trustbridge/nss-cmake-static: nspr/pr/src/md/unix/unix.c comparison

comparison nspr/pr/src/md/unix/unix.c @ 0:1e5118fa0cb1

This is NSS with a Cmake Buildsyste To compile a static NSS library for Windows we've used the Chromium-NSS fork and added a Cmake buildsystem to compile it statically for Windows. See README.chromium for chromium changes and README.trustbridge for our modifications.

author	Andre Heinecke <andre.heinecke@intevation.de>
date	Mon, 28 Jul 2014 10:47:06 +0200
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--1:000000000000
+:1e5118fa0cb1
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+* License, v. 2.0. If a copy of the MPL was not distributed with this
+* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+#include "primpl.h"
+#include <string.h>
+#include <signal.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <sys/time.h>
+#include <sys/ioctl.h>
+#include <sys/mman.h>
+#include <unistd.h>
+#include <sys/utsname.h>
+#ifdef _PR_POLL_AVAILABLE
+#include <poll.h>
+#endif
+/* To get FIONREAD */
+#if defined(UNIXWARE)
+#include <sys/filio.h>
+#endif
+#if defined(NTO)
+#include <sys/statvfs.h>
+#endif
+/*
+* Make sure _PRSockLen_t is 32-bit, because we will cast a PRUint32* or
+* PRInt32* pointer to a _PRSockLen_t* pointer.
+*/
+#if defined(HAVE_SOCKLEN_T) \
+|| (defined(__GLIBC__) && __GLIBC__ >= 2)
+#define _PRSockLen_t socklen_t
+#elif defined(IRIX) || defined(HPUX) || defined(OSF1) || defined(SOLARIS) \
+|| defined(AIX4_1) || defined(LINUX) \
+|| defined(BSDI) || defined(SCO) \
+|| defined(DARWIN) \
+|| defined(QNX)
+#define _PRSockLen_t int
+#elif (defined(AIX) && !defined(AIX4_1)) || defined(FREEBSD) \
+|| defined(NETBSD) || defined(OPENBSD) || defined(UNIXWARE) \
+|| defined(DGUX) || defined(NTO) || defined(RISCOS)
+#define _PRSockLen_t size_t
+#else
+#error "Cannot determine architecture"
+#endif
+/*
+** Global lock variable used to bracket calls into rusty libraries that
+** aren't thread safe (like libc, libX, etc).
+*/
+static PRLock *_pr_rename_lock = NULL;
+static PRMonitor *_pr_Xfe_mon = NULL;
+static PRInt64 minus_one;
+sigset_t timer_set;
+#if !defined(_PR_PTHREADS)
+static sigset_t empty_set;
+#ifdef SOLARIS
+#include <sys/file.h>
+#include <sys/filio.h>
+#endif
+#ifndef PIPE_BUF
+#define PIPE_BUF 512
+#endif
+/*
+* _nspr_noclock - if set clock interrupts are disabled
+*/
+int _nspr_noclock = 1;
+#ifdef IRIX
+extern PRInt32 _nspr_terminate_on_error;
+#endif
+/*
+* There is an assertion in this code that NSPR's definition of PRIOVec
+* is bit compatible with UNIX' definition of a struct iovec. This is
+* applicable to the 'writev()' operations where the types are casually
+* cast to avoid warnings.
+*/
+int _pr_md_pipefd[2] = { -1, -1 };
+static char _pr_md_pipebuf[PIPE_BUF];
+static PRInt32 local_io_wait(PRInt32 osfd, PRInt32 wait_flag,
+							PRIntervalTime timeout);
+_PRInterruptTable _pr_interruptTable[] = {
+{
+"clock", _PR_MISSED_CLOCK, _PR_ClockInterrupt,     },
+{
+0     }
+};
+void _MD_unix_init_running_cpu(_PRCPU *cpu)
+{
+PR_INIT_CLIST(&(cpu->md.md_unix.ioQ));
+cpu->md.md_unix.ioq_max_osfd = -1;
+cpu->md.md_unix.ioq_timeout = PR_INTERVAL_NO_TIMEOUT;
+}
+PRStatus _MD_open_dir(_MDDir *d, const char *name)
+{
+int err;
+d->d = opendir(name);
+if (!d->d) {
+err = _MD_ERRNO();
+_PR_MD_MAP_OPENDIR_ERROR(err);
+return PR_FAILURE;
+}
+return PR_SUCCESS;
+}
+PRInt32 _MD_close_dir(_MDDir *d)
+{
+int rv = 0, err;
+if (d->d) {
+rv = closedir(d->d);
+if (rv == -1) {
+err = _MD_ERRNO();
+_PR_MD_MAP_CLOSEDIR_ERROR(err);
+}
+}
+return rv;
+}
+char * _MD_read_dir(_MDDir *d, PRIntn flags)
+{
+struct dirent *de;
+int err;
+for (;;) {
+/*
+* XXX: readdir() is not MT-safe. There is an MT-safe version
+* readdir_r() on some systems.
+*/
+_MD_ERRNO() = 0;
+de = readdir(d->d);
+if (!de) {
+err = _MD_ERRNO();
+_PR_MD_MAP_READDIR_ERROR(err);
+return 0;
+}
+if ((flags & PR_SKIP_DOT) &&
+(de->d_name[0] == '.') && (de->d_name[1] == 0))
+continue;
+if ((flags & PR_SKIP_DOT_DOT) &&
+(de->d_name[0] == '.') && (de->d_name[1] == '.') &&
+(de->d_name[2] == 0))
+continue;
+if ((flags & PR_SKIP_HIDDEN) && (de->d_name[0] == '.'))
+continue;
+break;
+}
+return de->d_name;
+}
+PRInt32 _MD_delete(const char *name)
+{
+PRInt32 rv, err;
+#ifdef UNIXWARE
+sigset_t set, oset;
+#endif
+#ifdef UNIXWARE
+sigfillset(&set);
+sigprocmask(SIG_SETMASK, &set, &oset);
+#endif
+rv = unlink(name);
+#ifdef UNIXWARE
+sigprocmask(SIG_SETMASK, &oset, NULL);
+#endif
+if (rv == -1) {
+err = _MD_ERRNO();
+_PR_MD_MAP_UNLINK_ERROR(err);
+}
+return(rv);
+}
+PRInt32 _MD_rename(const char *from, const char *to)
+{
+PRInt32 rv = -1, err;
+/*
+** This is trying to enforce the semantics of WINDOZE' rename
+** operation. That means one is not allowed to rename over top
+** of an existing file. Holding a lock across these two function
+** and the open function is known to be a bad idea, but ....
+*/
+if (NULL != _pr_rename_lock)
+PR_Lock(_pr_rename_lock);
+if (0 == access(to, F_OK))
+PR_SetError(PR_FILE_EXISTS_ERROR, 0);
+else
+{
+rv = rename(from, to);
+if (rv < 0) {
+err = _MD_ERRNO();
+_PR_MD_MAP_RENAME_ERROR(err);
+}
+}
+if (NULL != _pr_rename_lock)
+PR_Unlock(_pr_rename_lock);
+return rv;
+}
+PRInt32 _MD_access(const char *name, PRAccessHow how)
+{
+PRInt32 rv, err;
+int amode;
+switch (how) {
+case PR_ACCESS_WRITE_OK:
+amode = W_OK;
+break;
+case PR_ACCESS_READ_OK:
+amode = R_OK;
+break;
+case PR_ACCESS_EXISTS:
+amode = F_OK;
+break;
+default:
+PR_SetError(PR_INVALID_ARGUMENT_ERROR, 0);
+rv = -1;
+goto done;
+}
+rv = access(name, amode);
+if (rv < 0) {
+err = _MD_ERRNO();
+_PR_MD_MAP_ACCESS_ERROR(err);
+}
+done:
+return(rv);
+}
+PRInt32 _MD_mkdir(const char *name, PRIntn mode)
+{
+int rv, err;
+/*
+** This lock is used to enforce rename semantics as described
+** in PR_Rename. Look there for more fun details.
+*/
+if (NULL !=_pr_rename_lock)
+PR_Lock(_pr_rename_lock);
+rv = mkdir(name, mode);
+if (rv < 0) {
+err = _MD_ERRNO();
+_PR_MD_MAP_MKDIR_ERROR(err);
+}
+if (NULL !=_pr_rename_lock)
+PR_Unlock(_pr_rename_lock);
+return rv;
+}
+PRInt32 _MD_rmdir(const char *name)
+{
+int rv, err;
+rv = rmdir(name);
+if (rv == -1) {
+err = _MD_ERRNO();
+_PR_MD_MAP_RMDIR_ERROR(err);
+}
+return rv;
+}
+PRInt32 _MD_read(PRFileDesc *fd, void *buf, PRInt32 amount)
+{
+PRThread *me = _PR_MD_CURRENT_THREAD();
+PRInt32 rv, err;
+#ifndef _PR_USE_POLL
+fd_set rd;
+#else
+struct pollfd pfd;
+#endif /* _PR_USE_POLL */
+PRInt32 osfd = fd->secret->md.osfd;
+#ifndef _PR_USE_POLL
+FD_ZERO(&rd);
+FD_SET(osfd, &rd);
+#else
+pfd.fd = osfd;
+pfd.events = POLLIN;
+#endif /* _PR_USE_POLL */
+while ((rv = read(osfd,buf,amount)) == -1) {
+err = _MD_ERRNO();
+if ((err == EAGAIN) || (err == EWOULDBLOCK)) {
+if (fd->secret->nonblocking) {
+break;
+}
+if (!_PR_IS_NATIVE_THREAD(me)) {
+if ((rv = local_io_wait(osfd, _PR_UNIX_POLL_READ,
+										PR_INTERVAL_NO_TIMEOUT)) < 0)
+					goto done;
+} else {
+#ifndef _PR_USE_POLL
+while ((rv = _MD_SELECT(osfd + 1, &rd, NULL, NULL, NULL))
+== -1 && (err = _MD_ERRNO()) == EINTR) {
+/* retry _MD_SELECT() if it is interrupted */
+}
+#else /* _PR_USE_POLL */
+while ((rv = _MD_POLL(&pfd, 1, -1))
+== -1 && (err = _MD_ERRNO()) == EINTR) {
+/* retry _MD_POLL() if it is interrupted */
+}
+#endif /* _PR_USE_POLL */
+if (rv == -1) {
+break;
+}
+}
+if (_PR_PENDING_INTERRUPT(me))
+break;
+} else if ((err == EINTR) && (!_PR_PENDING_INTERRUPT(me))){
+continue;
+} else {
+break;
+}
+}
+if (rv < 0) {
+if (_PR_PENDING_INTERRUPT(me)) {
+me->flags &= ~_PR_INTERRUPT;
+PR_SetError(PR_PENDING_INTERRUPT_ERROR, 0);
+} else {
+_PR_MD_MAP_READ_ERROR(err);
+}
+}
+done:
+return(rv);
+}
+PRInt32 _MD_write(PRFileDesc *fd, const void *buf, PRInt32 amount)
+{
+PRThread *me = _PR_MD_CURRENT_THREAD();
+PRInt32 rv, err;
+#ifndef _PR_USE_POLL
+fd_set wd;
+#else
+struct pollfd pfd;
+#endif /* _PR_USE_POLL */
+PRInt32 osfd = fd->secret->md.osfd;
+#ifndef _PR_USE_POLL
+FD_ZERO(&wd);
+FD_SET(osfd, &wd);
+#else
+pfd.fd = osfd;
+pfd.events = POLLOUT;
+#endif /* _PR_USE_POLL */
+while ((rv = write(osfd,buf,amount)) == -1) {
+err = _MD_ERRNO();
+if ((err == EAGAIN) || (err == EWOULDBLOCK)) {
+if (fd->secret->nonblocking) {
+break;
+}
+if (!_PR_IS_NATIVE_THREAD(me)) {
+if ((rv = local_io_wait(osfd, _PR_UNIX_POLL_WRITE,
+										PR_INTERVAL_NO_TIMEOUT)) < 0)
+goto done;
+} else {
+#ifndef _PR_USE_POLL
+while ((rv = _MD_SELECT(osfd + 1, NULL, &wd, NULL, NULL))
+== -1 && (err = _MD_ERRNO()) == EINTR) {
+/* retry _MD_SELECT() if it is interrupted */
+}
+#else /* _PR_USE_POLL */
+while ((rv = _MD_POLL(&pfd, 1, -1))
+== -1 && (err = _MD_ERRNO()) == EINTR) {
+/* retry _MD_POLL() if it is interrupted */
+}
+#endif /* _PR_USE_POLL */
+if (rv == -1) {
+break;
+}
+}
+if (_PR_PENDING_INTERRUPT(me))
+break;
+} else if ((err == EINTR) && (!_PR_PENDING_INTERRUPT(me))){
+continue;
+} else {
+break;
+}
+}
+if (rv < 0) {
+if (_PR_PENDING_INTERRUPT(me)) {
+me->flags &= ~_PR_INTERRUPT;
+PR_SetError(PR_PENDING_INTERRUPT_ERROR, 0);
+} else {
+_PR_MD_MAP_WRITE_ERROR(err);
+}
+}
+done:
+return(rv);
+}
+PRInt32 _MD_fsync(PRFileDesc *fd)
+{
+PRInt32 rv, err;
+rv = fsync(fd->secret->md.osfd);
+if (rv == -1) {
+err = _MD_ERRNO();
+_PR_MD_MAP_FSYNC_ERROR(err);
+}
+return(rv);
+}
+PRInt32 _MD_close(PRInt32 osfd)
+{
+PRInt32 rv, err;
+rv = close(osfd);
+if (rv == -1) {
+err = _MD_ERRNO();
+_PR_MD_MAP_CLOSE_ERROR(err);
+}
+return(rv);
+}
+PRInt32 _MD_socket(PRInt32 domain, PRInt32 type, PRInt32 proto)
+{
+PRInt32 osfd, err;
+osfd = socket(domain, type, proto);
+if (osfd == -1) {
+err = _MD_ERRNO();
+_PR_MD_MAP_SOCKET_ERROR(err);
+return(osfd);
+}
+return(osfd);
+}
+PRInt32 _MD_socketavailable(PRFileDesc *fd)
+{
+PRInt32 result;
+if (ioctl(fd->secret->md.osfd, FIONREAD, &result) < 0) {
+_PR_MD_MAP_SOCKETAVAILABLE_ERROR(_MD_ERRNO());
+return -1;
+}
+return result;
+}
+PRInt64 _MD_socketavailable64(PRFileDesc *fd)
+{
+PRInt64 result;
+LL_I2L(result, _MD_socketavailable(fd));
+return result;
+}  /* _MD_socketavailable64 */
+#define READ_FD        1
+#define WRITE_FD    2
+/*
+* socket_io_wait --
+*
+* wait for socket i/o, periodically checking for interrupt
+*
+* The first implementation uses select(), for platforms without
+* poll().  The second (preferred) implementation uses poll().
+*/
+#ifndef _PR_USE_POLL
+static PRInt32 socket_io_wait(PRInt32 osfd, PRInt32 fd_type,
+PRIntervalTime timeout)
+{
+PRInt32 rv = -1;
+struct timeval tv;
+PRThread *me = _PR_MD_CURRENT_THREAD();
+PRIntervalTime epoch, now, elapsed, remaining;
+PRBool wait_for_remaining;
+PRInt32 syserror;
+fd_set rd_wr;
+switch (timeout) {
+case PR_INTERVAL_NO_WAIT:
+PR_SetError(PR_IO_TIMEOUT_ERROR, 0);
+break;
+case PR_INTERVAL_NO_TIMEOUT:
+/*
+* This is a special case of the 'default' case below.
+* Please see the comments there.
+*/
+tv.tv_sec = _PR_INTERRUPT_CHECK_INTERVAL_SECS;
+tv.tv_usec = 0;
+FD_ZERO(&rd_wr);
+do {
+FD_SET(osfd, &rd_wr);
+if (fd_type == READ_FD)
+rv = _MD_SELECT(osfd + 1, &rd_wr, NULL, NULL, &tv);
+else
+rv = _MD_SELECT(osfd + 1, NULL, &rd_wr, NULL, &tv);
+if (rv == -1 && (syserror = _MD_ERRNO()) != EINTR) {
+_PR_MD_MAP_SELECT_ERROR(syserror);
+break;
+}
+if (_PR_PENDING_INTERRUPT(me)) {
+me->flags &= ~_PR_INTERRUPT;
+PR_SetError(PR_PENDING_INTERRUPT_ERROR, 0);
+rv = -1;
+break;
+}
+} while (rv == 0 || (rv == -1 && syserror == EINTR));
+break;
+default:
+now = epoch = PR_IntervalNow();
+remaining = timeout;
+FD_ZERO(&rd_wr);
+do {
+/*
+* We block in _MD_SELECT for at most
+* _PR_INTERRUPT_CHECK_INTERVAL_SECS seconds,
+* so that there is an upper limit on the delay
+* before the interrupt bit is checked.
+*/
+wait_for_remaining = PR_TRUE;
+tv.tv_sec = PR_IntervalToSeconds(remaining);
+if (tv.tv_sec > _PR_INTERRUPT_CHECK_INTERVAL_SECS) {
+wait_for_remaining = PR_FALSE;
+tv.tv_sec = _PR_INTERRUPT_CHECK_INTERVAL_SECS;
+tv.tv_usec = 0;
+} else {
+tv.tv_usec = PR_IntervalToMicroseconds(
+remaining -
+PR_SecondsToInterval(tv.tv_sec));
+}
+FD_SET(osfd, &rd_wr);
+if (fd_type == READ_FD)
+rv = _MD_SELECT(osfd + 1, &rd_wr, NULL, NULL, &tv);
+else
+rv = _MD_SELECT(osfd + 1, NULL, &rd_wr, NULL, &tv);
+/*
+* we don't consider EINTR a real error
+*/
+if (rv == -1 && (syserror = _MD_ERRNO()) != EINTR) {
+_PR_MD_MAP_SELECT_ERROR(syserror);
+break;
+}
+if (_PR_PENDING_INTERRUPT(me)) {
+me->flags &= ~_PR_INTERRUPT;
+PR_SetError(PR_PENDING_INTERRUPT_ERROR, 0);
+rv = -1;
+break;
+}
+/*
+* We loop again if _MD_SELECT timed out or got interrupted
+* by a signal, and the timeout deadline has not passed yet.
+*/
+if (rv == 0 || (rv == -1 && syserror == EINTR)) {
+/*
+* If _MD_SELECT timed out, we know how much time
+* we spent in blocking, so we can avoid a
+* PR_IntervalNow() call.
+*/
+if (rv == 0) {
+if (wait_for_remaining) {
+now += remaining;
+} else {
+now += PR_SecondsToInterval(tv.tv_sec)
++ PR_MicrosecondsToInterval(tv.tv_usec);
+}
+} else {
+now = PR_IntervalNow();
+}
+elapsed = (PRIntervalTime) (now - epoch);
+if (elapsed >= timeout) {
+PR_SetError(PR_IO_TIMEOUT_ERROR, 0);
+rv = -1;
+break;
+} else {
+remaining = timeout - elapsed;
+}
+}
+} while (rv == 0 || (rv == -1 && syserror == EINTR));
+break;
+}
+return(rv);
+}
+#else /* _PR_USE_POLL */
+static PRInt32 socket_io_wait(PRInt32 osfd, PRInt32 fd_type,
+PRIntervalTime timeout)
+{
+PRInt32 rv = -1;
+int msecs;
+PRThread *me = _PR_MD_CURRENT_THREAD();
+PRIntervalTime epoch, now, elapsed, remaining;
+PRBool wait_for_remaining;
+PRInt32 syserror;
+struct pollfd pfd;
+switch (timeout) {
+case PR_INTERVAL_NO_WAIT:
+PR_SetError(PR_IO_TIMEOUT_ERROR, 0);
+break;
+case PR_INTERVAL_NO_TIMEOUT:
+/*
+* This is a special case of the 'default' case below.
+* Please see the comments there.
+*/
+msecs = _PR_INTERRUPT_CHECK_INTERVAL_SECS * 1000;
+pfd.fd = osfd;
+if (fd_type == READ_FD) {
+pfd.events = POLLIN;
+} else {
+pfd.events = POLLOUT;
+}
+do {
+rv = _MD_POLL(&pfd, 1, msecs);
+if (rv == -1 && (syserror = _MD_ERRNO()) != EINTR) {
+_PR_MD_MAP_POLL_ERROR(syserror);
+break;
+}
+				/*
+				 * If POLLERR is set, don't process it; retry the operation
+				 */
+if ((rv == 1) && (pfd.revents & (POLLHUP | POLLNVAL))) {
+					rv = -1;
+_PR_MD_MAP_POLL_REVENTS_ERROR(pfd.revents);
+break;
+}
+if (_PR_PENDING_INTERRUPT(me)) {
+me->flags &= ~_PR_INTERRUPT;
+PR_SetError(PR_PENDING_INTERRUPT_ERROR, 0);
+rv = -1;
+break;
+}
+} while (rv == 0 || (rv == -1 && syserror == EINTR));
+break;
+default:
+now = epoch = PR_IntervalNow();
+remaining = timeout;
+pfd.fd = osfd;
+if (fd_type == READ_FD) {
+pfd.events = POLLIN;
+} else {
+pfd.events = POLLOUT;
+}
+do {
+/*
+* We block in _MD_POLL for at most
+* _PR_INTERRUPT_CHECK_INTERVAL_SECS seconds,
+* so that there is an upper limit on the delay
+* before the interrupt bit is checked.
+*/
+wait_for_remaining = PR_TRUE;
+msecs = PR_IntervalToMilliseconds(remaining);
+if (msecs > _PR_INTERRUPT_CHECK_INTERVAL_SECS * 1000) {
+wait_for_remaining = PR_FALSE;
+msecs = _PR_INTERRUPT_CHECK_INTERVAL_SECS * 1000;
+}
+rv = _MD_POLL(&pfd, 1, msecs);
+/*
+* we don't consider EINTR a real error
+*/
+if (rv == -1 && (syserror = _MD_ERRNO()) != EINTR) {
+_PR_MD_MAP_POLL_ERROR(syserror);
+break;
+}
+if (_PR_PENDING_INTERRUPT(me)) {
+me->flags &= ~_PR_INTERRUPT;
+PR_SetError(PR_PENDING_INTERRUPT_ERROR, 0);
+rv = -1;
+break;
+}
+				/*
+				 * If POLLERR is set, don't process it; retry the operation
+				 */
+if ((rv == 1) && (pfd.revents & (POLLHUP | POLLNVAL))) {
+					rv = -1;
+_PR_MD_MAP_POLL_REVENTS_ERROR(pfd.revents);
+break;
+}
+/*
+* We loop again if _MD_POLL timed out or got interrupted
+* by a signal, and the timeout deadline has not passed yet.
+*/
+if (rv == 0 || (rv == -1 && syserror == EINTR)) {
+/*
+* If _MD_POLL timed out, we know how much time
+* we spent in blocking, so we can avoid a
+* PR_IntervalNow() call.
+*/
+if (rv == 0) {
+if (wait_for_remaining) {
+now += remaining;
+} else {
+now += PR_MillisecondsToInterval(msecs);
+}
+} else {
+now = PR_IntervalNow();
+}
+elapsed = (PRIntervalTime) (now - epoch);
+if (elapsed >= timeout) {
+PR_SetError(PR_IO_TIMEOUT_ERROR, 0);
+rv = -1;
+break;
+} else {
+remaining = timeout - elapsed;
+}
+}
+} while (rv == 0 || (rv == -1 && syserror == EINTR));
+break;
+}
+return(rv);
+}
+#endif /* _PR_USE_POLL */
+static PRInt32 local_io_wait(
+PRInt32 osfd,
+PRInt32 wait_flag,
+PRIntervalTime timeout)
+{
+_PRUnixPollDesc pd;
+PRInt32 rv;
+PR_LOG(_pr_io_lm, PR_LOG_MIN,
+("waiting to %s on osfd=%d",
+(wait_flag == _PR_UNIX_POLL_READ) ? "read" : "write",
+osfd));
+if (timeout == PR_INTERVAL_NO_WAIT) return 0;
+pd.osfd = osfd;
+pd.in_flags = wait_flag;
+pd.out_flags = 0;
+rv = _PR_WaitForMultipleFDs(&pd, 1, timeout);
+if (rv == 0) {
+PR_SetError(PR_IO_TIMEOUT_ERROR, 0);
+rv = -1;
+}
+return rv;
+}
+PRInt32 _MD_recv(PRFileDesc *fd, void *buf, PRInt32 amount,
+PRInt32 flags, PRIntervalTime timeout)
+{
+PRInt32 osfd = fd->secret->md.osfd;
+PRInt32 rv, err;
+PRThread *me = _PR_MD_CURRENT_THREAD();
+/*
+* Many OS's (Solaris, Unixware) have a broken recv which won't read
+* from socketpairs.  As long as we don't use flags on socketpairs, this
+* is a decent fix. - mikep
+*/
+#if defined(UNIXWARE) || defined(SOLARIS)
+while ((rv = read(osfd,buf,amount)) == -1) {
+#else
+while ((rv = recv(osfd,buf,amount,flags)) == -1) {
+#endif
+err = _MD_ERRNO();
+if ((err == EAGAIN) || (err == EWOULDBLOCK)) {
+if (fd->secret->nonblocking) {
+break;
+}
+if (!_PR_IS_NATIVE_THREAD(me)) {
+				if ((rv = local_io_wait(osfd,_PR_UNIX_POLL_READ,timeout)) < 0)
+					goto done;
+} else {
+if ((rv = socket_io_wait(osfd, READ_FD, timeout)) < 0)
+goto done;
+}
+} else if ((err == EINTR) && (!_PR_PENDING_INTERRUPT(me))){
+continue;
+} else {
+break;
+}
+}
+if (rv < 0) {
+_PR_MD_MAP_RECV_ERROR(err);
+}
+done:
+return(rv);
+}
+PRInt32 _MD_recvfrom(PRFileDesc *fd, void *buf, PRInt32 amount,
+PRIntn flags, PRNetAddr *addr, PRUint32 *addrlen,
+PRIntervalTime timeout)
+{
+PRInt32 osfd = fd->secret->md.osfd;
+PRInt32 rv, err;
+PRThread *me = _PR_MD_CURRENT_THREAD();
+while ((*addrlen = PR_NETADDR_SIZE(addr)),
+((rv = recvfrom(osfd, buf, amount, flags,
+(struct sockaddr *) addr, (_PRSockLen_t *)addrlen)) == -1)) {
+err = _MD_ERRNO();
+if ((err == EAGAIN) || (err == EWOULDBLOCK)) {
+if (fd->secret->nonblocking) {
+break;
+}
+if (!_PR_IS_NATIVE_THREAD(me)) {
+if ((rv = local_io_wait(osfd, _PR_UNIX_POLL_READ, timeout)) < 0)
+goto done;
+} else {
+if ((rv = socket_io_wait(osfd, READ_FD, timeout)) < 0)
+goto done;
+}
+} else if ((err == EINTR) && (!_PR_PENDING_INTERRUPT(me))){
+continue;
+} else {
+break;
+}
+}
+if (rv < 0) {
+_PR_MD_MAP_RECVFROM_ERROR(err);
+}
+done:
+#ifdef _PR_HAVE_SOCKADDR_LEN
+if (rv != -1) {
+/* ignore the sa_len field of struct sockaddr */
+if (addr) {
+addr->raw.family = ((struct sockaddr *) addr)->sa_family;
+}
+}
+#endif /* _PR_HAVE_SOCKADDR_LEN */
+return(rv);
+}
+PRInt32 _MD_send(PRFileDesc *fd, const void *buf, PRInt32 amount,
+PRInt32 flags, PRIntervalTime timeout)
+{
+PRInt32 osfd = fd->secret->md.osfd;
+PRInt32 rv, err;
+PRThread *me = _PR_MD_CURRENT_THREAD();
+#if defined(SOLARIS)
+	PRInt32 tmp_amount = amount;
+#endif
+/*
+* On pre-2.6 Solaris, send() is much slower than write().
+* On 2.6 and beyond, with in-kernel sockets, send() and
+* write() are fairly equivalent in performance.
+*/
+#if defined(SOLARIS)
+PR_ASSERT(0 == flags);
+while ((rv = write(osfd,buf,tmp_amount)) == -1) {
+#else
+while ((rv = send(osfd,buf,amount,flags)) == -1) {
+#endif
+err = _MD_ERRNO();
+if ((err == EAGAIN) || (err == EWOULDBLOCK))    {
+if (fd->secret->nonblocking) {
+break;
+}
+if (!_PR_IS_NATIVE_THREAD(me)) {
+if ((rv = local_io_wait(osfd, _PR_UNIX_POLL_WRITE, timeout)) < 0)
+goto done;
+} else {
+if ((rv = socket_io_wait(osfd, WRITE_FD, timeout))< 0)
+goto done;
+}
+} else if ((err == EINTR) && (!_PR_PENDING_INTERRUPT(me))){
+continue;
+} else {
+#if defined(SOLARIS)
+			/*
+			 * The write system call has been reported to return the ERANGE
+			 * error on occasion. Try to write in smaller chunks to workaround
+			 * this bug.
+			 */
+			if (err == ERANGE) {
+				if (tmp_amount > 1) {
+					tmp_amount = tmp_amount/2;	/* half the bytes */
+					continue;
+				}
+			}
+#endif
+break;
+}
+}
+/*
+* optimization; if bytes sent is less than "amount" call
+* select before returning. This is because it is likely that
+* the next send() call will return EWOULDBLOCK.
+*/
+if ((!fd->secret->nonblocking) && (rv > 0) && (rv < amount)
+&& (timeout != PR_INTERVAL_NO_WAIT)) {
+if (_PR_IS_NATIVE_THREAD(me)) {
+			if (socket_io_wait(osfd, WRITE_FD, timeout)< 0) {
+				rv = -1;
+				goto done;
+			}
+} else {
+			if (local_io_wait(osfd, _PR_UNIX_POLL_WRITE, timeout) < 0) {
+				rv = -1;
+				goto done;
+			}
+}
+}
+if (rv < 0) {
+_PR_MD_MAP_SEND_ERROR(err);
+}
+done:
+return(rv);
+}
+PRInt32 _MD_sendto(
+PRFileDesc *fd, const void *buf, PRInt32 amount, PRIntn flags,
+const PRNetAddr *addr, PRUint32 addrlen, PRIntervalTime timeout)
+{
+PRInt32 osfd = fd->secret->md.osfd;
+PRInt32 rv, err;
+PRThread *me = _PR_MD_CURRENT_THREAD();
+#ifdef _PR_HAVE_SOCKADDR_LEN
+PRNetAddr addrCopy;
+addrCopy = *addr;
+((struct sockaddr *) &addrCopy)->sa_len = addrlen;
+((struct sockaddr *) &addrCopy)->sa_family = addr->raw.family;
+while ((rv = sendto(osfd, buf, amount, flags,
+(struct sockaddr *) &addrCopy, addrlen)) == -1) {
+#else
+while ((rv = sendto(osfd, buf, amount, flags,
+(struct sockaddr *) addr, addrlen)) == -1) {
+#endif
+err = _MD_ERRNO();
+if ((err == EAGAIN) || (err == EWOULDBLOCK))    {
+if (fd->secret->nonblocking) {
+break;
+}
+if (!_PR_IS_NATIVE_THREAD(me)) {
+				if ((rv = local_io_wait(osfd, _PR_UNIX_POLL_WRITE, timeout)) < 0)
+					goto done;
+} else {
+if ((rv = socket_io_wait(osfd, WRITE_FD, timeout))< 0)
+goto done;
+}
+} else if ((err == EINTR) && (!_PR_PENDING_INTERRUPT(me))){
+continue;
+} else {
+break;
+}
+}
+if (rv < 0) {
+_PR_MD_MAP_SENDTO_ERROR(err);
+}
+done:
+return(rv);
+}
+PRInt32 _MD_writev(
+PRFileDesc *fd, const PRIOVec *iov,
+PRInt32 iov_size, PRIntervalTime timeout)
+{
+PRInt32 rv, err;
+PRThread *me = _PR_MD_CURRENT_THREAD();
+PRInt32 index, amount = 0;
+PRInt32 osfd = fd->secret->md.osfd;
+/*
+* Calculate the total number of bytes to be sent; needed for
+* optimization later.
+* We could avoid this if this number was passed in; but it is
+* probably not a big deal because iov_size is usually small (less than
+* 3)
+*/
+if (!fd->secret->nonblocking) {
+for (index=0; index<iov_size; index++) {
+amount += iov[index].iov_len;
+}
+}
+while ((rv = writev(osfd, (const struct iovec*)iov, iov_size)) == -1) {
+err = _MD_ERRNO();
+if ((err == EAGAIN) || (err == EWOULDBLOCK))    {
+if (fd->secret->nonblocking) {
+break;
+}
+if (!_PR_IS_NATIVE_THREAD(me)) {
+				if ((rv = local_io_wait(osfd, _PR_UNIX_POLL_WRITE, timeout)) < 0)
+					goto done;
+} else {
+if ((rv = socket_io_wait(osfd, WRITE_FD, timeout))<0)
+goto done;
+}
+} else if ((err == EINTR) && (!_PR_PENDING_INTERRUPT(me))){
+continue;
+} else {
+break;
+}
+}
+/*
+* optimization; if bytes sent is less than "amount" call
+* select before returning. This is because it is likely that
+* the next writev() call will return EWOULDBLOCK.
+*/
+if ((!fd->secret->nonblocking) && (rv > 0) && (rv < amount)
+&& (timeout != PR_INTERVAL_NO_WAIT)) {
+if (_PR_IS_NATIVE_THREAD(me)) {
+if (socket_io_wait(osfd, WRITE_FD, timeout) < 0) {
+				rv = -1;
+goto done;
+			}
+} else {
+			if (local_io_wait(osfd, _PR_UNIX_POLL_WRITE, timeout) < 0) {
+				rv = -1;
+				goto done;
+			}
+}
+}
+if (rv < 0) {
+_PR_MD_MAP_WRITEV_ERROR(err);
+}
+done:
+return(rv);
+}
+PRInt32 _MD_accept(PRFileDesc *fd, PRNetAddr *addr,
+PRUint32 *addrlen, PRIntervalTime timeout)
+{
+PRInt32 osfd = fd->secret->md.osfd;
+PRInt32 rv, err;
+PRThread *me = _PR_MD_CURRENT_THREAD();
+while ((rv = accept(osfd, (struct sockaddr *) addr,
+(_PRSockLen_t *)addrlen)) == -1) {
+err = _MD_ERRNO();
+if ((err == EAGAIN) || (err == EWOULDBLOCK) || (err == ECONNABORTED)) {
+if (fd->secret->nonblocking) {
+break;
+}
+if (!_PR_IS_NATIVE_THREAD(me)) {
+				if ((rv = local_io_wait(osfd, _PR_UNIX_POLL_READ, timeout)) < 0)
+					goto done;
+} else {
+if ((rv = socket_io_wait(osfd, READ_FD, timeout)) < 0)
+goto done;
+}
+} else if ((err == EINTR) && (!_PR_PENDING_INTERRUPT(me))){
+continue;
+} else {
+break;
+}
+}
+if (rv < 0) {
+_PR_MD_MAP_ACCEPT_ERROR(err);
+}
+done:
+#ifdef _PR_HAVE_SOCKADDR_LEN
+if (rv != -1) {
+/* ignore the sa_len field of struct sockaddr */
+if (addr) {
+addr->raw.family = ((struct sockaddr *) addr)->sa_family;
+}
+}
+#endif /* _PR_HAVE_SOCKADDR_LEN */
+return(rv);
+}
+extern int _connect (int s, const struct sockaddr *name, int namelen);
+PRInt32 _MD_connect(
+PRFileDesc *fd, const PRNetAddr *addr, PRUint32 addrlen, PRIntervalTime timeout)
+{
+PRInt32 rv, err;
+PRThread *me = _PR_MD_CURRENT_THREAD();
+PRInt32 osfd = fd->secret->md.osfd;
+#ifdef IRIX
+extern PRInt32 _MD_irix_connect(
+PRInt32 osfd, const PRNetAddr *addr, PRInt32 addrlen, PRIntervalTime timeout);
+#endif
+#ifdef _PR_HAVE_SOCKADDR_LEN
+PRNetAddr addrCopy;
+addrCopy = *addr;
+((struct sockaddr *) &addrCopy)->sa_len = addrlen;
+((struct sockaddr *) &addrCopy)->sa_family = addr->raw.family;
+#endif
+/*
+* We initiate the connection setup by making a nonblocking connect()
+* call.  If the connect() call fails, there are two cases we handle
+* specially:
+* 1. The connect() call was interrupted by a signal.  In this case
+*    we simply retry connect().
+* 2. The NSPR socket is nonblocking and connect() fails with
+*    EINPROGRESS.  We first wait until the socket becomes writable.
+*    Then we try to find out whether the connection setup succeeded
+*    or failed.
+*/
+retry:
+#ifdef IRIX
+if ((rv = _MD_irix_connect(osfd, addr, addrlen, timeout)) == -1) {
+#else
+#ifdef _PR_HAVE_SOCKADDR_LEN
+if ((rv = connect(osfd, (struct sockaddr *)&addrCopy, addrlen)) == -1) {
+#else
+if ((rv = connect(osfd, (struct sockaddr *)addr, addrlen)) == -1) {
+#endif
+#endif
+err = _MD_ERRNO();
+if (err == EINTR) {
+if (_PR_PENDING_INTERRUPT(me)) {
+me->flags &= ~_PR_INTERRUPT;
+PR_SetError( PR_PENDING_INTERRUPT_ERROR, 0);
+return -1;
+}
+goto retry;
+}
+if (!fd->secret->nonblocking && (err == EINPROGRESS)) {
+if (!_PR_IS_NATIVE_THREAD(me)) {
+				if ((rv = local_io_wait(osfd, _PR_UNIX_POLL_WRITE, timeout)) < 0)
+return -1;
+} else {
+/*
+* socket_io_wait() may return -1 or 1.
+*/
+rv = socket_io_wait(osfd, WRITE_FD, timeout);
+if (rv == -1) {
+return -1;
+}
+}
+PR_ASSERT(rv == 1);
+if (_PR_PENDING_INTERRUPT(me)) {
+me->flags &= ~_PR_INTERRUPT;
+PR_SetError( PR_PENDING_INTERRUPT_ERROR, 0);
+return -1;
+}
+err = _MD_unix_get_nonblocking_connect_error(osfd);
+if (err != 0) {
+_PR_MD_MAP_CONNECT_ERROR(err);
+return -1;
+}
+return 0;
+}
+_PR_MD_MAP_CONNECT_ERROR(err);
+}
+return rv;
+}  /* _MD_connect */
+PRInt32 _MD_bind(PRFileDesc *fd, const PRNetAddr *addr, PRUint32 addrlen)
+{
+PRInt32 rv, err;
+#ifdef _PR_HAVE_SOCKADDR_LEN
+PRNetAddr addrCopy;
+addrCopy = *addr;
+((struct sockaddr *) &addrCopy)->sa_len = addrlen;
+((struct sockaddr *) &addrCopy)->sa_family = addr->raw.family;
+rv = bind(fd->secret->md.osfd, (struct sockaddr *) &addrCopy, (int )addrlen);
+#else
+rv = bind(fd->secret->md.osfd, (struct sockaddr *) addr, (int )addrlen);
+#endif
+if (rv < 0) {
+err = _MD_ERRNO();
+_PR_MD_MAP_BIND_ERROR(err);
+}
+return(rv);
+}
+PRInt32 _MD_listen(PRFileDesc *fd, PRIntn backlog)
+{
+PRInt32 rv, err;
+rv = listen(fd->secret->md.osfd, backlog);
+if (rv < 0) {
+err = _MD_ERRNO();
+_PR_MD_MAP_LISTEN_ERROR(err);
+}
+return(rv);
+}
+PRInt32 _MD_shutdown(PRFileDesc *fd, PRIntn how)
+{
+PRInt32 rv, err;
+rv = shutdown(fd->secret->md.osfd, how);
+if (rv < 0) {
+err = _MD_ERRNO();
+_PR_MD_MAP_SHUTDOWN_ERROR(err);
+}
+return(rv);
+}
+PRInt32 _MD_socketpair(int af, int type, int flags,
+PRInt32 *osfd)
+{
+PRInt32 rv, err;
+rv = socketpair(af, type, flags, osfd);
+if (rv < 0) {
+err = _MD_ERRNO();
+_PR_MD_MAP_SOCKETPAIR_ERROR(err);
+}
+return rv;
+}
+PRStatus _MD_getsockname(PRFileDesc *fd, PRNetAddr *addr,
+PRUint32 *addrlen)
+{
+PRInt32 rv, err;
+rv = getsockname(fd->secret->md.osfd,
+(struct sockaddr *) addr, (_PRSockLen_t *)addrlen);
+#ifdef _PR_HAVE_SOCKADDR_LEN
+if (rv == 0) {
+/* ignore the sa_len field of struct sockaddr */
+if (addr) {
+addr->raw.family = ((struct sockaddr *) addr)->sa_family;
+}
+}
+#endif /* _PR_HAVE_SOCKADDR_LEN */
+if (rv < 0) {
+err = _MD_ERRNO();
+_PR_MD_MAP_GETSOCKNAME_ERROR(err);
+}
+return rv==0?PR_SUCCESS:PR_FAILURE;
+}
+PRStatus _MD_getpeername(PRFileDesc *fd, PRNetAddr *addr,
+PRUint32 *addrlen)
+{
+PRInt32 rv, err;
+rv = getpeername(fd->secret->md.osfd,
+(struct sockaddr *) addr, (_PRSockLen_t *)addrlen);
+#ifdef _PR_HAVE_SOCKADDR_LEN
+if (rv == 0) {
+/* ignore the sa_len field of struct sockaddr */
+if (addr) {
+addr->raw.family = ((struct sockaddr *) addr)->sa_family;
+}
+}
+#endif /* _PR_HAVE_SOCKADDR_LEN */
+if (rv < 0) {
+err = _MD_ERRNO();
+_PR_MD_MAP_GETPEERNAME_ERROR(err);
+}
+return rv==0?PR_SUCCESS:PR_FAILURE;
+}
+PRStatus _MD_getsockopt(PRFileDesc *fd, PRInt32 level,
+PRInt32 optname, char* optval, PRInt32* optlen)
+{
+PRInt32 rv, err;
+rv = getsockopt(fd->secret->md.osfd, level, optname, optval, (_PRSockLen_t *)optlen);
+if (rv < 0) {
+err = _MD_ERRNO();
+_PR_MD_MAP_GETSOCKOPT_ERROR(err);
+}
+return rv==0?PR_SUCCESS:PR_FAILURE;
+}
+PRStatus _MD_setsockopt(PRFileDesc *fd, PRInt32 level,
+PRInt32 optname, const char* optval, PRInt32 optlen)
+{
+PRInt32 rv, err;
+rv = setsockopt(fd->secret->md.osfd, level, optname, optval, optlen);
+if (rv < 0) {
+err = _MD_ERRNO();
+_PR_MD_MAP_SETSOCKOPT_ERROR(err);
+}
+return rv==0?PR_SUCCESS:PR_FAILURE;
+}
+PRStatus _MD_set_fd_inheritable(PRFileDesc *fd, PRBool inheritable)
+{
+int rv;
+rv = fcntl(fd->secret->md.osfd, F_SETFD, inheritable ? 0 : FD_CLOEXEC);
+if (-1 == rv) {
+PR_SetError(PR_UNKNOWN_ERROR, _MD_ERRNO());
+return PR_FAILURE;
+}
+return PR_SUCCESS;
+}
+void _MD_init_fd_inheritable(PRFileDesc *fd, PRBool imported)
+{
+if (imported) {
+fd->secret->inheritable = _PR_TRI_UNKNOWN;
+} else {
+/* By default, a Unix fd is not closed on exec. */
+#ifdef DEBUG
+{
+int flags = fcntl(fd->secret->md.osfd, F_GETFD, 0);
+PR_ASSERT(0 == flags);
+}
+#endif
+fd->secret->inheritable = _PR_TRI_TRUE;
+}
+}
+/************************************************************************/
+#if !defined(_PR_USE_POLL)
+/*
+** Scan through io queue and find any bad fd's that triggered the error
+** from _MD_SELECT
+*/
+static void FindBadFDs(void)
+{
+PRCList *q;
+PRThread *me = _MD_CURRENT_THREAD();
+PR_ASSERT(!_PR_IS_NATIVE_THREAD(me));
+q = (_PR_IOQ(me->cpu)).next;
+_PR_IOQ_MAX_OSFD(me->cpu) = -1;
+_PR_IOQ_TIMEOUT(me->cpu) = PR_INTERVAL_NO_TIMEOUT;
+while (q != &_PR_IOQ(me->cpu)) {
+PRPollQueue *pq = _PR_POLLQUEUE_PTR(q);
+PRBool notify = PR_FALSE;
+_PRUnixPollDesc *pds = pq->pds;
+_PRUnixPollDesc *epds = pds + pq->npds;
+PRInt32 pq_max_osfd = -1;
+q = q->next;
+for (; pds < epds; pds++) {
+PRInt32 osfd = pds->osfd;
+pds->out_flags = 0;
+PR_ASSERT(osfd >= 0 || pds->in_flags == 0);
+if (pds->in_flags == 0) {
+continue;  /* skip this fd */
+}
+if (fcntl(osfd, F_GETFL, 0) == -1) {
+/* Found a bad descriptor, remove it from the fd_sets. */
+PR_LOG(_pr_io_lm, PR_LOG_MAX,
+("file descriptor %d is bad", osfd));
+pds->out_flags = _PR_UNIX_POLL_NVAL;
+notify = PR_TRUE;
+}
+if (osfd > pq_max_osfd) {
+pq_max_osfd = osfd;
+}
+}
+if (notify) {
+PRIntn pri;
+PR_REMOVE_LINK(&pq->links);
+pq->on_ioq = PR_FALSE;
+/*
+* Decrement the count of descriptors for each desciptor/event
+* because this I/O request is being removed from the
+* ioq
+*/
+pds = pq->pds;
+for (; pds < epds; pds++) {
+PRInt32 osfd = pds->osfd;
+PRInt16 in_flags = pds->in_flags;
+PR_ASSERT(osfd >= 0 || in_flags == 0);
+if (in_flags & _PR_UNIX_POLL_READ) {
+if (--(_PR_FD_READ_CNT(me->cpu))[osfd] == 0)
+FD_CLR(osfd, &_PR_FD_READ_SET(me->cpu));
+}
+if (in_flags & _PR_UNIX_POLL_WRITE) {
+if (--(_PR_FD_WRITE_CNT(me->cpu))[osfd] == 0)
+FD_CLR(osfd, &_PR_FD_WRITE_SET(me->cpu));
+}
+if (in_flags & _PR_UNIX_POLL_EXCEPT) {
+if (--(_PR_FD_EXCEPTION_CNT(me->cpu))[osfd] == 0)
+FD_CLR(osfd, &_PR_FD_EXCEPTION_SET(me->cpu));
+}
+}
+_PR_THREAD_LOCK(pq->thr);
+if (pq->thr->flags & (_PR_ON_PAUSEQ|_PR_ON_SLEEPQ)) {
+_PRCPU *cpu = pq->thr->cpu;
+_PR_SLEEPQ_LOCK(pq->thr->cpu);
+_PR_DEL_SLEEPQ(pq->thr, PR_TRUE);
+_PR_SLEEPQ_UNLOCK(pq->thr->cpu);
+				if (pq->thr->flags & _PR_SUSPENDING) {
+				    /*
+				     * set thread state to SUSPENDED;
+				     * a Resume operation on the thread
+				     * will move it to the runQ
+				     */
+				    pq->thr->state = _PR_SUSPENDED;
+				    _PR_MISCQ_LOCK(pq->thr->cpu);
+				    _PR_ADD_SUSPENDQ(pq->thr, pq->thr->cpu);
+				    _PR_MISCQ_UNLOCK(pq->thr->cpu);
+				} else {
+				    pri = pq->thr->priority;
+				    pq->thr->state = _PR_RUNNABLE;
+				    _PR_RUNQ_LOCK(cpu);
+				    _PR_ADD_RUNQ(pq->thr, cpu, pri);
+				    _PR_RUNQ_UNLOCK(cpu);
+				}
+}
+_PR_THREAD_UNLOCK(pq->thr);
+} else {
+if (pq->timeout < _PR_IOQ_TIMEOUT(me->cpu))
+_PR_IOQ_TIMEOUT(me->cpu) = pq->timeout;
+if (_PR_IOQ_MAX_OSFD(me->cpu) < pq_max_osfd)
+_PR_IOQ_MAX_OSFD(me->cpu) = pq_max_osfd;
+}
+}
+if (_PR_IS_NATIVE_THREAD_SUPPORTED()) {
+if (_PR_IOQ_MAX_OSFD(me->cpu) < _pr_md_pipefd[0])
+_PR_IOQ_MAX_OSFD(me->cpu) = _pr_md_pipefd[0];
+}
+}
+#endif  /* !defined(_PR_USE_POLL) */
+/************************************************************************/
+/*
+** Called by the scheduler when there is nothing to do. This means that
+** all threads are blocked on some monitor somewhere.
+**
+** Note: this code doesn't release the scheduler lock.
+*/
+/*
+** Pause the current CPU. longjmp to the cpu's pause stack
+**
+** This must be called with the scheduler locked
+*/
+void _MD_PauseCPU(PRIntervalTime ticks)
+{
+PRThread *me = _MD_CURRENT_THREAD();
+#ifdef _PR_USE_POLL
+int timeout;
+struct pollfd *pollfds;    /* an array of pollfd structures */
+struct pollfd *pollfdPtr;    /* a pointer that steps through the array */
+unsigned long npollfds;     /* number of pollfd structures in array */
+unsigned long pollfds_size;
+int nfd;                    /* to hold the return value of poll() */
+#else
+struct timeval timeout, *tvp;
+fd_set r, w, e;
+fd_set *rp, *wp, *ep;
+PRInt32 max_osfd, nfd;
+#endif  /* _PR_USE_POLL */
+PRInt32 rv;
+PRCList *q;
+PRUint32 min_timeout;
+sigset_t oldset;
+#ifdef IRIX
+extern sigset_t ints_off;
+#endif
+PR_ASSERT(_PR_MD_GET_INTSOFF() != 0);
+_PR_MD_IOQ_LOCK();
+#ifdef _PR_USE_POLL
+/* Build up the pollfd structure array to wait on */
+/* Find out how many pollfd structures are needed */
+npollfds = _PR_IOQ_OSFD_CNT(me->cpu);
+PR_ASSERT(npollfds >= 0);
+/*
+* We use a pipe to wake up a native thread.  An fd is needed
+* for the pipe and we poll it for reading.
+*/
+if (_PR_IS_NATIVE_THREAD_SUPPORTED()) {
+npollfds++;
+#ifdef	IRIX
+		/*
+		 * On Irix, a second pipe is used to cause the primordial cpu to
+		 * wakeup and exit, when the process is exiting because of a call
+		 * to exit/PR_ProcessExit.
+		 */
+		if (me->cpu->id == 0) {
+	npollfds++;
+		}
+#endif
+	}
+/*
+* if the cpu's pollfd array is not big enough, release it and allocate a new one
+*/
+if (npollfds > _PR_IOQ_POLLFDS_SIZE(me->cpu)) {
+if (_PR_IOQ_POLLFDS(me->cpu) != NULL)
+PR_DELETE(_PR_IOQ_POLLFDS(me->cpu));
+pollfds_size =  PR_MAX(_PR_IOQ_MIN_POLLFDS_SIZE(me->cpu), npollfds);
+pollfds = (struct pollfd *) PR_MALLOC(pollfds_size * sizeof(struct pollfd));
+_PR_IOQ_POLLFDS(me->cpu) = pollfds;
+_PR_IOQ_POLLFDS_SIZE(me->cpu) = pollfds_size;
+} else {
+pollfds = _PR_IOQ_POLLFDS(me->cpu);
+}
+pollfdPtr = pollfds;
+/*
+* If we need to poll the pipe for waking up a native thread,
+* the pipe's fd is the first element in the pollfds array.
+*/
+if (_PR_IS_NATIVE_THREAD_SUPPORTED()) {
+pollfdPtr->fd = _pr_md_pipefd[0];
+pollfdPtr->events = POLLIN;
+pollfdPtr++;
+#ifdef	IRIX
+		/*
+		 * On Irix, the second element is the exit pipe
+		 */
+		if (me->cpu->id == 0) {
+			pollfdPtr->fd = _pr_irix_primoridal_cpu_fd[0];
+			pollfdPtr->events = POLLIN;
+			pollfdPtr++;
+		}
+#endif
+}
+min_timeout = PR_INTERVAL_NO_TIMEOUT;
+for (q = _PR_IOQ(me->cpu).next; q != &_PR_IOQ(me->cpu); q = q->next) {
+PRPollQueue *pq = _PR_POLLQUEUE_PTR(q);
+_PRUnixPollDesc *pds = pq->pds;
+_PRUnixPollDesc *epds = pds + pq->npds;
+if (pq->timeout < min_timeout) {
+min_timeout = pq->timeout;
+}
+for (; pds < epds; pds++, pollfdPtr++) {
+/*
+* Assert that the pollfdPtr pointer does not go
+* beyond the end of the pollfds array
+*/
+PR_ASSERT(pollfdPtr < pollfds + npollfds);
+pollfdPtr->fd = pds->osfd;
+/* direct copy of poll flags */
+pollfdPtr->events = pds->in_flags;
+}
+}
+_PR_IOQ_TIMEOUT(me->cpu) = min_timeout;
+#else
+/*
+* assigment of fd_sets
+*/
+r = _PR_FD_READ_SET(me->cpu);
+w = _PR_FD_WRITE_SET(me->cpu);
+e = _PR_FD_EXCEPTION_SET(me->cpu);
+rp = &r;
+wp = &w;
+ep = &e;
+max_osfd = _PR_IOQ_MAX_OSFD(me->cpu) + 1;
+min_timeout = _PR_IOQ_TIMEOUT(me->cpu);
+#endif  /* _PR_USE_POLL */
+/*
+** Compute the minimum timeout value: make it the smaller of the
+** timeouts specified by the i/o pollers or the timeout of the first
+** sleeping thread.
+*/
+q = _PR_SLEEPQ(me->cpu).next;
+if (q != &_PR_SLEEPQ(me->cpu)) {
+PRThread *t = _PR_THREAD_PTR(q);
+if (t->sleep < min_timeout) {
+min_timeout = t->sleep;
+}
+}
+if (min_timeout > ticks) {
+min_timeout = ticks;
+}
+#ifdef _PR_USE_POLL
+if (min_timeout == PR_INTERVAL_NO_TIMEOUT)
+timeout = -1;
+else
+timeout = PR_IntervalToMilliseconds(min_timeout);
+#else
+if (min_timeout == PR_INTERVAL_NO_TIMEOUT) {
+tvp = NULL;
+} else {
+timeout.tv_sec = PR_IntervalToSeconds(min_timeout);
+timeout.tv_usec = PR_IntervalToMicroseconds(min_timeout)
+% PR_USEC_PER_SEC;
+tvp = &timeout;
+}
+#endif  /* _PR_USE_POLL */
+_PR_MD_IOQ_UNLOCK();
+_MD_CHECK_FOR_EXIT();
+/*
+* check for i/o operations
+*/
+#ifndef _PR_NO_CLOCK_TIMER
+/*
+* Disable the clock interrupts while we are in select, if clock interrupts
+* are enabled. Otherwise, when the select/poll calls are interrupted, the
+* timer value starts ticking from zero again when the system call is restarted.
+*/
+#ifdef IRIX
+/*
+* SIGCHLD signal is used on Irix to detect he termination of an
+* sproc by SIGSEGV, SIGBUS or SIGABRT signals when
+* _nspr_terminate_on_error is set.
+*/
+if ((!_nspr_noclock) || (_nspr_terminate_on_error))
+#else
+if (!_nspr_noclock)
+#endif    /* IRIX */
+#ifdef IRIX
+sigprocmask(SIG_BLOCK, &ints_off, &oldset);
+#else
+PR_ASSERT(sigismember(&timer_set, SIGALRM));
+sigprocmask(SIG_BLOCK, &timer_set, &oldset);
+#endif    /* IRIX */
+#endif  /* !_PR_NO_CLOCK_TIMER */
+#ifndef _PR_USE_POLL
+PR_ASSERT(FD_ISSET(_pr_md_pipefd[0],rp));
+nfd = _MD_SELECT(max_osfd, rp, wp, ep, tvp);
+#else
+nfd = _MD_POLL(pollfds, npollfds, timeout);
+#endif  /* !_PR_USE_POLL */
+#ifndef _PR_NO_CLOCK_TIMER
+#ifdef IRIX
+if ((!_nspr_noclock) || (_nspr_terminate_on_error))
+#else
+if (!_nspr_noclock)
+#endif    /* IRIX */
+sigprocmask(SIG_SETMASK, &oldset, 0);
+#endif  /* !_PR_NO_CLOCK_TIMER */
+_MD_CHECK_FOR_EXIT();
+#ifdef IRIX
+	_PR_MD_primordial_cpu();
+#endif
+_PR_MD_IOQ_LOCK();
+/*
+** Notify monitors that are associated with the selected descriptors.
+*/
+#ifdef _PR_USE_POLL
+if (nfd > 0) {
+pollfdPtr = pollfds;
+if (_PR_IS_NATIVE_THREAD_SUPPORTED()) {
+/*
+			 * Assert that the pipe is the first element in the
+			 * pollfds array.
+			 */
+PR_ASSERT(pollfds[0].fd == _pr_md_pipefd[0]);
+if ((pollfds[0].revents & POLLIN) && (nfd == 1)) {
+/*
+				 * woken up by another thread; read all the data
+				 * in the pipe to empty the pipe
+				 */
+while ((rv = read(_pr_md_pipefd[0], _pr_md_pipebuf,
+PIPE_BUF)) == PIPE_BUF){
+}
+PR_ASSERT((rv > 0) || ((rv == -1) && (errno == EAGAIN)));
+}
+pollfdPtr++;
+#ifdef	IRIX
+			/*
+			 * On Irix, check to see if the primordial cpu needs to exit
+			 * to cause the process to terminate
+			 */
+			if (me->cpu->id == 0) {
+	PR_ASSERT(pollfds[1].fd == _pr_irix_primoridal_cpu_fd[0]);
+				if (pollfdPtr->revents & POLLIN) {
+					if (_pr_irix_process_exit) {
+						/*
+						 * process exit due to a call to PR_ProcessExit
+						 */
+						prctl(PR_SETEXITSIG, SIGKILL);
+						_exit(_pr_irix_process_exit_code);
+					} else {
+						while ((rv = read(_pr_irix_primoridal_cpu_fd[0],
+							_pr_md_pipebuf, PIPE_BUF)) == PIPE_BUF) {
+						}
+						PR_ASSERT(rv > 0);
+					}
+				}
+				pollfdPtr++;
+			}
+#endif
+}
+for (q = _PR_IOQ(me->cpu).next; q != &_PR_IOQ(me->cpu); q = q->next) {
+PRPollQueue *pq = _PR_POLLQUEUE_PTR(q);
+PRBool notify = PR_FALSE;
+_PRUnixPollDesc *pds = pq->pds;
+_PRUnixPollDesc *epds = pds + pq->npds;
+for (; pds < epds; pds++, pollfdPtr++) {
+/*
+* Assert that the pollfdPtr pointer does not go beyond
+* the end of the pollfds array.
+*/
+PR_ASSERT(pollfdPtr < pollfds + npollfds);
+/*
+* Assert that the fd's in the pollfds array (stepped
+* through by pollfdPtr) are in the same order as
+* the fd's in _PR_IOQ() (stepped through by q and pds).
+* This is how the pollfds array was created earlier.
+*/
+PR_ASSERT(pollfdPtr->fd == pds->osfd);
+pds->out_flags = pollfdPtr->revents;
+/* Negative fd's are ignored by poll() */
+if (pds->osfd >= 0 && pds->out_flags) {
+notify = PR_TRUE;
+}
+}
+if (notify) {
+PRIntn pri;
+PRThread *thred;
+PR_REMOVE_LINK(&pq->links);
+pq->on_ioq = PR_FALSE;
+thred = pq->thr;
+_PR_THREAD_LOCK(thred);
+if (pq->thr->flags & (_PR_ON_PAUSEQ|_PR_ON_SLEEPQ)) {
+_PRCPU *cpu = pq->thr->cpu;
+_PR_SLEEPQ_LOCK(pq->thr->cpu);
+_PR_DEL_SLEEPQ(pq->thr, PR_TRUE);
+_PR_SLEEPQ_UNLOCK(pq->thr->cpu);
+					if (pq->thr->flags & _PR_SUSPENDING) {
+					    /*
+					     * set thread state to SUSPENDED;
+					     * a Resume operation on the thread
+					     * will move it to the runQ
+					     */
+					    pq->thr->state = _PR_SUSPENDED;
+					    _PR_MISCQ_LOCK(pq->thr->cpu);
+					    _PR_ADD_SUSPENDQ(pq->thr, pq->thr->cpu);
+					    _PR_MISCQ_UNLOCK(pq->thr->cpu);
+					} else {
+						pri = pq->thr->priority;
+						pq->thr->state = _PR_RUNNABLE;
+						_PR_RUNQ_LOCK(cpu);
+						_PR_ADD_RUNQ(pq->thr, cpu, pri);
+						_PR_RUNQ_UNLOCK(cpu);
+						if (_pr_md_idle_cpus > 1)
+							_PR_MD_WAKEUP_WAITER(thred);
+					}
+}
+_PR_THREAD_UNLOCK(thred);
+_PR_IOQ_OSFD_CNT(me->cpu) -= pq->npds;
+PR_ASSERT(_PR_IOQ_OSFD_CNT(me->cpu) >= 0);
+}
+}
+} else if (nfd == -1) {
+PR_LOG(_pr_io_lm, PR_LOG_MAX, ("poll() failed with errno %d", errno));
+}
+#else
+if (nfd > 0) {
+q = _PR_IOQ(me->cpu).next;
+_PR_IOQ_MAX_OSFD(me->cpu) = -1;
+_PR_IOQ_TIMEOUT(me->cpu) = PR_INTERVAL_NO_TIMEOUT;
+while (q != &_PR_IOQ(me->cpu)) {
+PRPollQueue *pq = _PR_POLLQUEUE_PTR(q);
+PRBool notify = PR_FALSE;
+_PRUnixPollDesc *pds = pq->pds;
+_PRUnixPollDesc *epds = pds + pq->npds;
+PRInt32 pq_max_osfd = -1;
+q = q->next;
+for (; pds < epds; pds++) {
+PRInt32 osfd = pds->osfd;
+PRInt16 in_flags = pds->in_flags;
+PRInt16 out_flags = 0;
+PR_ASSERT(osfd >= 0 || in_flags == 0);
+if ((in_flags & _PR_UNIX_POLL_READ) && FD_ISSET(osfd, rp)) {
+out_flags |= _PR_UNIX_POLL_READ;
+}
+if ((in_flags & _PR_UNIX_POLL_WRITE) && FD_ISSET(osfd, wp)) {
+out_flags |= _PR_UNIX_POLL_WRITE;
+}
+if ((in_flags & _PR_UNIX_POLL_EXCEPT) && FD_ISSET(osfd, ep)) {
+out_flags |= _PR_UNIX_POLL_EXCEPT;
+}
+pds->out_flags = out_flags;
+if (out_flags) {
+notify = PR_TRUE;
+}
+if (osfd > pq_max_osfd) {
+pq_max_osfd = osfd;
+}
+}
+if (notify == PR_TRUE) {
+PRIntn pri;
+PRThread *thred;
+PR_REMOVE_LINK(&pq->links);
+pq->on_ioq = PR_FALSE;
+/*
+* Decrement the count of descriptors for each desciptor/event
+* because this I/O request is being removed from the
+* ioq
+*/
+pds = pq->pds;
+for (; pds < epds; pds++) {
+PRInt32 osfd = pds->osfd;
+PRInt16 in_flags = pds->in_flags;
+PR_ASSERT(osfd >= 0 || in_flags == 0);
+if (in_flags & _PR_UNIX_POLL_READ) {
+if (--(_PR_FD_READ_CNT(me->cpu))[osfd] == 0)
+FD_CLR(osfd, &_PR_FD_READ_SET(me->cpu));
+}
+if (in_flags & _PR_UNIX_POLL_WRITE) {
+if (--(_PR_FD_WRITE_CNT(me->cpu))[osfd] == 0)
+FD_CLR(osfd, &_PR_FD_WRITE_SET(me->cpu));
+}
+if (in_flags & _PR_UNIX_POLL_EXCEPT) {
+if (--(_PR_FD_EXCEPTION_CNT(me->cpu))[osfd] == 0)
+FD_CLR(osfd, &_PR_FD_EXCEPTION_SET(me->cpu));
+}
+}
+/*
+* Because this thread can run on a different cpu right
+* after being added to the run queue, do not dereference
+* pq
+*/
+thred = pq->thr;
+_PR_THREAD_LOCK(thred);
+if (pq->thr->flags & (_PR_ON_PAUSEQ|_PR_ON_SLEEPQ)) {
+_PRCPU *cpu = thred->cpu;
+_PR_SLEEPQ_LOCK(pq->thr->cpu);
+_PR_DEL_SLEEPQ(pq->thr, PR_TRUE);
+_PR_SLEEPQ_UNLOCK(pq->thr->cpu);
+					if (pq->thr->flags & _PR_SUSPENDING) {
+					    /*
+					     * set thread state to SUSPENDED;
+					     * a Resume operation on the thread
+					     * will move it to the runQ
+					     */
+					    pq->thr->state = _PR_SUSPENDED;
+					    _PR_MISCQ_LOCK(pq->thr->cpu);
+					    _PR_ADD_SUSPENDQ(pq->thr, pq->thr->cpu);
+					    _PR_MISCQ_UNLOCK(pq->thr->cpu);
+					} else {
+						pri = pq->thr->priority;
+						pq->thr->state = _PR_RUNNABLE;
+						pq->thr->cpu = cpu;
+						_PR_RUNQ_LOCK(cpu);
+						_PR_ADD_RUNQ(pq->thr, cpu, pri);
+						_PR_RUNQ_UNLOCK(cpu);
+						if (_pr_md_idle_cpus > 1)
+							_PR_MD_WAKEUP_WAITER(thred);
+					}
+}
+_PR_THREAD_UNLOCK(thred);
+} else {
+if (pq->timeout < _PR_IOQ_TIMEOUT(me->cpu))
+_PR_IOQ_TIMEOUT(me->cpu) = pq->timeout;
+if (_PR_IOQ_MAX_OSFD(me->cpu) < pq_max_osfd)
+_PR_IOQ_MAX_OSFD(me->cpu) = pq_max_osfd;
+}
+}
+if (_PR_IS_NATIVE_THREAD_SUPPORTED()) {
+if ((FD_ISSET(_pr_md_pipefd[0], rp)) && (nfd == 1)) {
+/*
+* woken up by another thread; read all the data
+* in the pipe to empty the pipe
+*/
+while ((rv =
+read(_pr_md_pipefd[0], _pr_md_pipebuf, PIPE_BUF))
+== PIPE_BUF){
+}
+PR_ASSERT((rv > 0) ||
+((rv == -1) && (errno == EAGAIN)));
+}
+if (_PR_IOQ_MAX_OSFD(me->cpu) < _pr_md_pipefd[0])
+_PR_IOQ_MAX_OSFD(me->cpu) = _pr_md_pipefd[0];
+#ifdef	IRIX
+			if ((me->cpu->id == 0) &&
+						(FD_ISSET(_pr_irix_primoridal_cpu_fd[0], rp))) {
+				if (_pr_irix_process_exit) {
+					/*
+					 * process exit due to a call to PR_ProcessExit
+					 */
+					prctl(PR_SETEXITSIG, SIGKILL);
+					_exit(_pr_irix_process_exit_code);
+				} else {
+						while ((rv = read(_pr_irix_primoridal_cpu_fd[0],
+							_pr_md_pipebuf, PIPE_BUF)) == PIPE_BUF) {
+						}
+						PR_ASSERT(rv > 0);
+				}
+			}
+			if (me->cpu->id == 0) {
+				if (_PR_IOQ_MAX_OSFD(me->cpu) < _pr_irix_primoridal_cpu_fd[0])
+					_PR_IOQ_MAX_OSFD(me->cpu) = _pr_irix_primoridal_cpu_fd[0];
+			}
+#endif
+}
+} else if (nfd < 0) {
+if (errno == EBADF) {
+FindBadFDs();
+} else {
+PR_LOG(_pr_io_lm, PR_LOG_MAX, ("select() failed with errno %d",
+errno));
+}
+} else {
+PR_ASSERT(nfd == 0);
+/*
+* compute the new value of _PR_IOQ_TIMEOUT
+*/
+q = _PR_IOQ(me->cpu).next;
+_PR_IOQ_MAX_OSFD(me->cpu) = -1;
+_PR_IOQ_TIMEOUT(me->cpu) = PR_INTERVAL_NO_TIMEOUT;
+while (q != &_PR_IOQ(me->cpu)) {
+PRPollQueue *pq = _PR_POLLQUEUE_PTR(q);
+_PRUnixPollDesc *pds = pq->pds;
+_PRUnixPollDesc *epds = pds + pq->npds;
+PRInt32 pq_max_osfd = -1;
+q = q->next;
+for (; pds < epds; pds++) {
+if (pds->osfd > pq_max_osfd) {
+pq_max_osfd = pds->osfd;
+}
+}
+if (pq->timeout < _PR_IOQ_TIMEOUT(me->cpu))
+_PR_IOQ_TIMEOUT(me->cpu) = pq->timeout;
+if (_PR_IOQ_MAX_OSFD(me->cpu) < pq_max_osfd)
+_PR_IOQ_MAX_OSFD(me->cpu) = pq_max_osfd;
+}
+if (_PR_IS_NATIVE_THREAD_SUPPORTED()) {
+if (_PR_IOQ_MAX_OSFD(me->cpu) < _pr_md_pipefd[0])
+_PR_IOQ_MAX_OSFD(me->cpu) = _pr_md_pipefd[0];
+}
+}
+#endif  /* _PR_USE_POLL */
+_PR_MD_IOQ_UNLOCK();
+}
+void _MD_Wakeup_CPUs()
+{
+PRInt32 rv, data;
+data = 0;
+rv = write(_pr_md_pipefd[1], &data, 1);
+while ((rv < 0) && (errno == EAGAIN)) {
+/*
+* pipe full, read all data in pipe to empty it
+*/
+while ((rv =
+read(_pr_md_pipefd[0], _pr_md_pipebuf, PIPE_BUF))
+== PIPE_BUF) {
+}
+PR_ASSERT((rv > 0) ||
+((rv == -1) && (errno == EAGAIN)));
+rv = write(_pr_md_pipefd[1], &data, 1);
+}
+}
+void _MD_InitCPUS()
+{
+PRInt32 rv, flags;
+PRThread *me = _MD_CURRENT_THREAD();
+rv = pipe(_pr_md_pipefd);
+PR_ASSERT(rv == 0);
+_PR_IOQ_MAX_OSFD(me->cpu) = _pr_md_pipefd[0];
+#ifndef _PR_USE_POLL
+FD_SET(_pr_md_pipefd[0], &_PR_FD_READ_SET(me->cpu));
+#endif
+flags = fcntl(_pr_md_pipefd[0], F_GETFL, 0);
+fcntl(_pr_md_pipefd[0], F_SETFL, flags | O_NONBLOCK);
+flags = fcntl(_pr_md_pipefd[1], F_GETFL, 0);
+fcntl(_pr_md_pipefd[1], F_SETFL, flags | O_NONBLOCK);
+}
+/*
+** Unix SIGALRM (clock) signal handler
+*/
+static void ClockInterruptHandler()
+{
+int olderrno;
+PRUintn pri;
+_PRCPU *cpu = _PR_MD_CURRENT_CPU();
+PRThread *me = _MD_CURRENT_THREAD();
+#ifdef SOLARIS
+if (!me || _PR_IS_NATIVE_THREAD(me)) {
+_pr_primordialCPU->u.missed[_pr_primordialCPU->where] |= _PR_MISSED_CLOCK;
+return;
+}
+#endif
+if (_PR_MD_GET_INTSOFF() != 0) {
+cpu->u.missed[cpu->where] |= _PR_MISSED_CLOCK;
+return;
+}
+_PR_MD_SET_INTSOFF(1);
+olderrno = errno;
+_PR_ClockInterrupt();
+errno = olderrno;
+/*
+** If the interrupt wants a resched or if some other thread at
+** the same priority needs the cpu, reschedule.
+*/
+pri = me->priority;
+if ((cpu->u.missed[3] || (_PR_RUNQREADYMASK(me->cpu) >> pri))) {
+#ifdef _PR_NO_PREEMPT
+cpu->resched = PR_TRUE;
+if (pr_interruptSwitchHook) {
+(*pr_interruptSwitchHook)(pr_interruptSwitchHookArg);
+}
+#else /* _PR_NO_PREEMPT */
+/*
+** Re-enable unix interrupts (so that we can use
+** setjmp/longjmp for context switching without having to
+** worry about the signal state)
+*/
+sigprocmask(SIG_SETMASK, &empty_set, 0);
+PR_LOG(_pr_sched_lm, PR_LOG_MIN, ("clock caused context switch"));
+if(!(me->flags & _PR_IDLE_THREAD)) {
+_PR_THREAD_LOCK(me);
+me->state = _PR_RUNNABLE;
+me->cpu = cpu;
+_PR_RUNQ_LOCK(cpu);
+_PR_ADD_RUNQ(me, cpu, pri);
+_PR_RUNQ_UNLOCK(cpu);
+_PR_THREAD_UNLOCK(me);
+} else
+me->state = _PR_RUNNABLE;
+_MD_SWITCH_CONTEXT(me);
+PR_LOG(_pr_sched_lm, PR_LOG_MIN, ("clock back from context switch"));
+#endif /* _PR_NO_PREEMPT */
+}
+/*
+* Because this thread could be running on a different cpu after
+* a context switch the current cpu should be accessed and the
+* value of the 'cpu' variable should not be used.
+*/
+_PR_MD_SET_INTSOFF(0);
+}
+/*
+* On HP-UX 9, we have to use the sigvector() interface to restart
+* interrupted system calls, because sigaction() does not have the
+* SA_RESTART flag.
+*/
+#ifdef HPUX9
+static void HPUX9_ClockInterruptHandler(
+int sig,
+int code,
+struct sigcontext *scp)
+{
+ClockInterruptHandler();
+scp->sc_syscall_action = SIG_RESTART;
+}
+#endif /* HPUX9 */
+/* # of milliseconds per clock tick that we will use */
+#define MSEC_PER_TICK    50
+void _MD_StartInterrupts()
+{
+char *eval;
+if ((eval = getenv("NSPR_NOCLOCK")) != NULL) {
+if (atoi(eval) == 0)
+_nspr_noclock = 0;
+else
+_nspr_noclock = 1;
+}
+#ifndef _PR_NO_CLOCK_TIMER
+if (!_nspr_noclock) {
+_MD_EnableClockInterrupts();
+}
+#endif
+}
+void _MD_StopInterrupts()
+{
+sigprocmask(SIG_BLOCK, &timer_set, 0);
+}
+void _MD_EnableClockInterrupts()
+{
+struct itimerval itval;
+extern PRUintn _pr_numCPU;
+#ifdef HPUX9
+struct sigvec vec;
+vec.sv_handler = (void (*)()) HPUX9_ClockInterruptHandler;
+vec.sv_mask = 0;
+vec.sv_flags = 0;
+sigvector(SIGALRM, &vec, 0);
+#else
+struct sigaction vtact;
+vtact.sa_handler = (void (*)()) ClockInterruptHandler;
+sigemptyset(&vtact.sa_mask);
+vtact.sa_flags = SA_RESTART;
+sigaction(SIGALRM, &vtact, 0);
+#endif /* HPUX9 */
+PR_ASSERT(_pr_numCPU == 1);
+	itval.it_interval.tv_sec = 0;
+	itval.it_interval.tv_usec = MSEC_PER_TICK * PR_USEC_PER_MSEC;
+	itval.it_value = itval.it_interval;
+	setitimer(ITIMER_REAL, &itval, 0);
+}
+void _MD_DisableClockInterrupts()
+{
+struct itimerval itval;
+extern PRUintn _pr_numCPU;
+PR_ASSERT(_pr_numCPU == 1);
+	itval.it_interval.tv_sec = 0;
+	itval.it_interval.tv_usec = 0;
+	itval.it_value = itval.it_interval;
+	setitimer(ITIMER_REAL, &itval, 0);
+}
+void _MD_BlockClockInterrupts()
+{
+sigprocmask(SIG_BLOCK, &timer_set, 0);
+}
+void _MD_UnblockClockInterrupts()
+{
+sigprocmask(SIG_UNBLOCK, &timer_set, 0);
+}
+void _MD_MakeNonblock(PRFileDesc *fd)
+{
+PRInt32 osfd = fd->secret->md.osfd;
+int flags;
+if (osfd <= 2) {
+/* Don't mess around with stdin, stdout or stderr */
+return;
+}
+flags = fcntl(osfd, F_GETFL, 0);
+/*
+* Use O_NONBLOCK (POSIX-style non-blocking I/O) whenever possible.
+* On SunOS 4, we must use FNDELAY (BSD-style non-blocking I/O),
+* otherwise connect() still blocks and can be interrupted by SIGALRM.
+*/
+fcntl(osfd, F_SETFL, flags | O_NONBLOCK);
+}
+PRInt32 _MD_open(const char *name, PRIntn flags, PRIntn mode)
+{
+PRInt32 osflags;
+PRInt32 rv, err;
+if (flags & PR_RDWR) {
+osflags = O_RDWR;
+} else if (flags & PR_WRONLY) {
+osflags = O_WRONLY;
+} else {
+osflags = O_RDONLY;
+}
+if (flags & PR_EXCL)
+osflags |= O_EXCL;
+if (flags & PR_APPEND)
+osflags |= O_APPEND;
+if (flags & PR_TRUNCATE)
+osflags |= O_TRUNC;
+if (flags & PR_SYNC) {
+#if defined(O_SYNC)
+osflags |= O_SYNC;
+#elif defined(O_FSYNC)
+osflags |= O_FSYNC;
+#else
+#error "Neither O_SYNC nor O_FSYNC is defined on this platform"
+#endif
+}
+/*
+** On creations we hold the 'create' lock in order to enforce
+** the semantics of PR_Rename. (see the latter for more details)
+*/
+if (flags & PR_CREATE_FILE)
+{
+osflags |= O_CREAT;
+if (NULL !=_pr_rename_lock)
+PR_Lock(_pr_rename_lock);
+}
+#if defined(ANDROID)
+osflags |= O_LARGEFILE;
+#endif
+rv = _md_iovector._open64(name, osflags, mode);
+if (rv < 0) {
+err = _MD_ERRNO();
+_PR_MD_MAP_OPEN_ERROR(err);
+}
+if ((flags & PR_CREATE_FILE) && (NULL !=_pr_rename_lock))
+PR_Unlock(_pr_rename_lock);
+return rv;
+}
+PRIntervalTime intr_timeout_ticks;
+#if defined(SOLARIS) || defined(IRIX)
+static void sigsegvhandler() {
+fprintf(stderr,"Received SIGSEGV\n");
+fflush(stderr);
+pause();
+}
+static void sigaborthandler() {
+fprintf(stderr,"Received SIGABRT\n");
+fflush(stderr);
+pause();
+}
+static void sigbushandler() {
+fprintf(stderr,"Received SIGBUS\n");
+fflush(stderr);
+pause();
+}
+#endif /* SOLARIS, IRIX */
+#endif  /* !defined(_PR_PTHREADS) */
+void _MD_query_fd_inheritable(PRFileDesc *fd)
+{
+int flags;
+PR_ASSERT(_PR_TRI_UNKNOWN == fd->secret->inheritable);
+flags = fcntl(fd->secret->md.osfd, F_GETFD, 0);
+PR_ASSERT(-1 != flags);
+fd->secret->inheritable = (flags & FD_CLOEXEC) ?
+_PR_TRI_FALSE : _PR_TRI_TRUE;
+}
+PROffset32 _MD_lseek(PRFileDesc *fd, PROffset32 offset, PRSeekWhence whence)
+{
+PROffset32 rv, where;
+switch (whence) {
+case PR_SEEK_SET:
+where = SEEK_SET;
+break;
+case PR_SEEK_CUR:
+where = SEEK_CUR;
+break;
+case PR_SEEK_END:
+where = SEEK_END;
+break;
+default:
+PR_SetError(PR_INVALID_ARGUMENT_ERROR, 0);
+rv = -1;
+goto done;
+}
+rv = lseek(fd->secret->md.osfd,offset,where);
+if (rv == -1)
+{
+PRInt32 syserr = _MD_ERRNO();
+_PR_MD_MAP_LSEEK_ERROR(syserr);
+}
+done:
+return(rv);
+}
+PROffset64 _MD_lseek64(PRFileDesc *fd, PROffset64 offset, PRSeekWhence whence)
+{
+PRInt32 where;
+PROffset64 rv;
+switch (whence)
+{
+case PR_SEEK_SET:
+where = SEEK_SET;
+break;
+case PR_SEEK_CUR:
+where = SEEK_CUR;
+break;
+case PR_SEEK_END:
+where = SEEK_END;
+break;
+default:
+PR_SetError(PR_INVALID_ARGUMENT_ERROR, 0);
+rv = minus_one;
+goto done;
+}
+rv = _md_iovector._lseek64(fd->secret->md.osfd, offset, where);
+if (LL_EQ(rv, minus_one))
+{
+PRInt32 syserr = _MD_ERRNO();
+_PR_MD_MAP_LSEEK_ERROR(syserr);
+}
+done:
+return rv;
+}  /* _MD_lseek64 */
+/*
+** _MD_set_fileinfo_times --
+**     Set the modifyTime and creationTime of the PRFileInfo
+**     structure using the values in struct stat.
+**
+** _MD_set_fileinfo64_times --
+**     Set the modifyTime and creationTime of the PRFileInfo64
+**     structure using the values in _MDStat64.
+*/
+#if defined(_PR_STAT_HAS_ST_ATIM)
+/*
+** struct stat has st_atim, st_mtim, and st_ctim fields of
+** type timestruc_t.
+*/
+static void _MD_set_fileinfo_times(
+const struct stat *sb,
+PRFileInfo *info)
+{
+PRInt64 us, s2us;
+LL_I2L(s2us, PR_USEC_PER_SEC);
+LL_I2L(info->modifyTime, sb->st_mtim.tv_sec);
+LL_MUL(info->modifyTime, info->modifyTime, s2us);
+LL_I2L(us, sb->st_mtim.tv_nsec / 1000);
+LL_ADD(info->modifyTime, info->modifyTime, us);
+LL_I2L(info->creationTime, sb->st_ctim.tv_sec);
+LL_MUL(info->creationTime, info->creationTime, s2us);
+LL_I2L(us, sb->st_ctim.tv_nsec / 1000);
+LL_ADD(info->creationTime, info->creationTime, us);
+}
+static void _MD_set_fileinfo64_times(
+const _MDStat64 *sb,
+PRFileInfo64 *info)
+{
+PRInt64 us, s2us;
+LL_I2L(s2us, PR_USEC_PER_SEC);
+LL_I2L(info->modifyTime, sb->st_mtim.tv_sec);
+LL_MUL(info->modifyTime, info->modifyTime, s2us);
+LL_I2L(us, sb->st_mtim.tv_nsec / 1000);
+LL_ADD(info->modifyTime, info->modifyTime, us);
+LL_I2L(info->creationTime, sb->st_ctim.tv_sec);
+LL_MUL(info->creationTime, info->creationTime, s2us);
+LL_I2L(us, sb->st_ctim.tv_nsec / 1000);
+LL_ADD(info->creationTime, info->creationTime, us);
+}
+#elif defined(_PR_STAT_HAS_ST_ATIM_UNION)
+/*
+** The st_atim, st_mtim, and st_ctim fields in struct stat are
+** unions with a st__tim union member of type timestruc_t.
+*/
+static void _MD_set_fileinfo_times(
+const struct stat *sb,
+PRFileInfo *info)
+{
+PRInt64 us, s2us;
+LL_I2L(s2us, PR_USEC_PER_SEC);
+LL_I2L(info->modifyTime, sb->st_mtim.st__tim.tv_sec);
+LL_MUL(info->modifyTime, info->modifyTime, s2us);
+LL_I2L(us, sb->st_mtim.st__tim.tv_nsec / 1000);
+LL_ADD(info->modifyTime, info->modifyTime, us);
+LL_I2L(info->creationTime, sb->st_ctim.st__tim.tv_sec);
+LL_MUL(info->creationTime, info->creationTime, s2us);
+LL_I2L(us, sb->st_ctim.st__tim.tv_nsec / 1000);
+LL_ADD(info->creationTime, info->creationTime, us);
+}
+static void _MD_set_fileinfo64_times(
+const _MDStat64 *sb,
+PRFileInfo64 *info)
+{
+PRInt64 us, s2us;
+LL_I2L(s2us, PR_USEC_PER_SEC);
+LL_I2L(info->modifyTime, sb->st_mtim.st__tim.tv_sec);
+LL_MUL(info->modifyTime, info->modifyTime, s2us);
+LL_I2L(us, sb->st_mtim.st__tim.tv_nsec / 1000);
+LL_ADD(info->modifyTime, info->modifyTime, us);
+LL_I2L(info->creationTime, sb->st_ctim.st__tim.tv_sec);
+LL_MUL(info->creationTime, info->creationTime, s2us);
+LL_I2L(us, sb->st_ctim.st__tim.tv_nsec / 1000);
+LL_ADD(info->creationTime, info->creationTime, us);
+}
+#elif defined(_PR_STAT_HAS_ST_ATIMESPEC)
+/*
+** struct stat has st_atimespec, st_mtimespec, and st_ctimespec
+** fields of type struct timespec.
+*/
+#if defined(_PR_TIMESPEC_HAS_TS_SEC)
+static void _MD_set_fileinfo_times(
+const struct stat *sb,
+PRFileInfo *info)
+{
+PRInt64 us, s2us;
+LL_I2L(s2us, PR_USEC_PER_SEC);
+LL_I2L(info->modifyTime, sb->st_mtimespec.ts_sec);
+LL_MUL(info->modifyTime, info->modifyTime, s2us);
+LL_I2L(us, sb->st_mtimespec.ts_nsec / 1000);
+LL_ADD(info->modifyTime, info->modifyTime, us);
+LL_I2L(info->creationTime, sb->st_ctimespec.ts_sec);
+LL_MUL(info->creationTime, info->creationTime, s2us);
+LL_I2L(us, sb->st_ctimespec.ts_nsec / 1000);
+LL_ADD(info->creationTime, info->creationTime, us);
+}
+static void _MD_set_fileinfo64_times(
+const _MDStat64 *sb,
+PRFileInfo64 *info)
+{
+PRInt64 us, s2us;
+LL_I2L(s2us, PR_USEC_PER_SEC);
+LL_I2L(info->modifyTime, sb->st_mtimespec.ts_sec);
+LL_MUL(info->modifyTime, info->modifyTime, s2us);
+LL_I2L(us, sb->st_mtimespec.ts_nsec / 1000);
+LL_ADD(info->modifyTime, info->modifyTime, us);
+LL_I2L(info->creationTime, sb->st_ctimespec.ts_sec);
+LL_MUL(info->creationTime, info->creationTime, s2us);
+LL_I2L(us, sb->st_ctimespec.ts_nsec / 1000);
+LL_ADD(info->creationTime, info->creationTime, us);
+}
+#else /* _PR_TIMESPEC_HAS_TS_SEC */
+/*
+** The POSIX timespec structure has tv_sec and tv_nsec.
+*/
+static void _MD_set_fileinfo_times(
+const struct stat *sb,
+PRFileInfo *info)
+{
+PRInt64 us, s2us;
+LL_I2L(s2us, PR_USEC_PER_SEC);
+LL_I2L(info->modifyTime, sb->st_mtimespec.tv_sec);
+LL_MUL(info->modifyTime, info->modifyTime, s2us);
+LL_I2L(us, sb->st_mtimespec.tv_nsec / 1000);
+LL_ADD(info->modifyTime, info->modifyTime, us);
+LL_I2L(info->creationTime, sb->st_ctimespec.tv_sec);
+LL_MUL(info->creationTime, info->creationTime, s2us);
+LL_I2L(us, sb->st_ctimespec.tv_nsec / 1000);
+LL_ADD(info->creationTime, info->creationTime, us);
+}
+static void _MD_set_fileinfo64_times(
+const _MDStat64 *sb,
+PRFileInfo64 *info)
+{
+PRInt64 us, s2us;
+LL_I2L(s2us, PR_USEC_PER_SEC);
+LL_I2L(info->modifyTime, sb->st_mtimespec.tv_sec);
+LL_MUL(info->modifyTime, info->modifyTime, s2us);
+LL_I2L(us, sb->st_mtimespec.tv_nsec / 1000);
+LL_ADD(info->modifyTime, info->modifyTime, us);
+LL_I2L(info->creationTime, sb->st_ctimespec.tv_sec);
+LL_MUL(info->creationTime, info->creationTime, s2us);
+LL_I2L(us, sb->st_ctimespec.tv_nsec / 1000);
+LL_ADD(info->creationTime, info->creationTime, us);
+}
+#endif /* _PR_TIMESPEC_HAS_TS_SEC */
+#elif defined(_PR_STAT_HAS_ONLY_ST_ATIME)
+/*
+** struct stat only has st_atime, st_mtime, and st_ctime fields
+** of type time_t.
+*/
+static void _MD_set_fileinfo_times(
+const struct stat *sb,
+PRFileInfo *info)
+{
+PRInt64 s, s2us;
+LL_I2L(s2us, PR_USEC_PER_SEC);
+LL_I2L(s, sb->st_mtime);
+LL_MUL(s, s, s2us);
+info->modifyTime = s;
+LL_I2L(s, sb->st_ctime);
+LL_MUL(s, s, s2us);
+info->creationTime = s;
+}
+static void _MD_set_fileinfo64_times(
+const _MDStat64 *sb,
+PRFileInfo64 *info)
+{
+PRInt64 s, s2us;
+LL_I2L(s2us, PR_USEC_PER_SEC);
+LL_I2L(s, sb->st_mtime);
+LL_MUL(s, s, s2us);
+info->modifyTime = s;
+LL_I2L(s, sb->st_ctime);
+LL_MUL(s, s, s2us);
+info->creationTime = s;
+}
+#else
+#error "I don't know yet"
+#endif
+static int _MD_convert_stat_to_fileinfo(
+const struct stat *sb,
+PRFileInfo *info)
+{
+if (S_IFREG & sb->st_mode)
+info->type = PR_FILE_FILE;
+else if (S_IFDIR & sb->st_mode)
+info->type = PR_FILE_DIRECTORY;
+else
+info->type = PR_FILE_OTHER;
+#if defined(_PR_HAVE_LARGE_OFF_T)
+if (0x7fffffffL < sb->st_size)
+{
+PR_SetError(PR_FILE_TOO_BIG_ERROR, 0);
+return -1;
+}
+#endif /* defined(_PR_HAVE_LARGE_OFF_T) */
+info->size = sb->st_size;
+_MD_set_fileinfo_times(sb, info);
+return 0;
+}  /* _MD_convert_stat_to_fileinfo */
+static int _MD_convert_stat64_to_fileinfo64(
+const _MDStat64 *sb,
+PRFileInfo64 *info)
+{
+if (S_IFREG & sb->st_mode)
+info->type = PR_FILE_FILE;
+else if (S_IFDIR & sb->st_mode)
+info->type = PR_FILE_DIRECTORY;
+else
+info->type = PR_FILE_OTHER;
+LL_I2L(info->size, sb->st_size);
+_MD_set_fileinfo64_times(sb, info);
+return 0;
+}  /* _MD_convert_stat64_to_fileinfo64 */
+PRInt32 _MD_getfileinfo(const char *fn, PRFileInfo *info)
+{
+PRInt32 rv;
+struct stat sb;
+rv = stat(fn, &sb);
+if (rv < 0)
+_PR_MD_MAP_STAT_ERROR(_MD_ERRNO());
+else if (NULL != info)
+rv = _MD_convert_stat_to_fileinfo(&sb, info);
+return rv;
+}
+PRInt32 _MD_getfileinfo64(const char *fn, PRFileInfo64 *info)
+{
+_MDStat64 sb;
+PRInt32 rv = _md_iovector._stat64(fn, &sb);
+if (rv < 0)
+_PR_MD_MAP_STAT_ERROR(_MD_ERRNO());
+else if (NULL != info)
+rv = _MD_convert_stat64_to_fileinfo64(&sb, info);
+return rv;
+}
+PRInt32 _MD_getopenfileinfo(const PRFileDesc *fd, PRFileInfo *info)
+{
+struct stat sb;
+PRInt32 rv = fstat(fd->secret->md.osfd, &sb);
+if (rv < 0)
+_PR_MD_MAP_FSTAT_ERROR(_MD_ERRNO());
+else if (NULL != info)
+rv = _MD_convert_stat_to_fileinfo(&sb, info);
+return rv;
+}
+PRInt32 _MD_getopenfileinfo64(const PRFileDesc *fd, PRFileInfo64 *info)
+{
+_MDStat64 sb;
+PRInt32 rv = _md_iovector._fstat64(fd->secret->md.osfd, &sb);
+if (rv < 0)
+_PR_MD_MAP_FSTAT_ERROR(_MD_ERRNO());
+else if (NULL != info)
+rv = _MD_convert_stat64_to_fileinfo64(&sb, info);
+return rv;
+}
+/*
+* _md_iovector._open64 must be initialized to 'open' so that _PR_InitLog can
+* open the log file during NSPR initialization, before _md_iovector is
+* initialized by _PR_MD_FINAL_INIT.  This means the log file cannot be a
+* large file on some platforms.
+*/
+#ifdef SYMBIAN
+struct _MD_IOVector _md_iovector; /* Will crash if NSPR_LOG_FILE is set. */
+#else
+struct _MD_IOVector _md_iovector = { open };
+#endif
+/*
+** These implementations are to emulate large file routines on systems that
+** don't have them. Their goal is to check in case overflow occurs. Otherwise
+** they will just operate as normal using 32-bit file routines.
+**
+** The checking might be pre- or post-op, depending on the semantics.
+*/
+#if defined(SOLARIS2_5)
+static PRIntn _MD_solaris25_fstat64(PRIntn osfd, _MDStat64 *buf)
+{
+PRInt32 rv;
+struct stat sb;
+rv = fstat(osfd, &sb);
+if (rv >= 0)
+{
+/*
+** I'm only copying the fields that are immediately needed.
+** If somebody else calls this function, some of the fields
+** may not be defined.
+*/
+(void)memset(buf, 0, sizeof(_MDStat64));
+buf->st_mode = sb.st_mode;
+buf->st_ctim = sb.st_ctim;
+buf->st_mtim = sb.st_mtim;
+buf->st_size = sb.st_size;
+}
+return rv;
+}  /* _MD_solaris25_fstat64 */
+static PRIntn _MD_solaris25_stat64(const char *fn, _MDStat64 *buf)
+{
+PRInt32 rv;
+struct stat sb;
+rv = stat(fn, &sb);
+if (rv >= 0)
+{
+/*
+** I'm only copying the fields that are immediately needed.
+** If somebody else calls this function, some of the fields
+** may not be defined.
+*/
+(void)memset(buf, 0, sizeof(_MDStat64));
+buf->st_mode = sb.st_mode;
+buf->st_ctim = sb.st_ctim;
+buf->st_mtim = sb.st_mtim;
+buf->st_size = sb.st_size;
+}
+return rv;
+}  /* _MD_solaris25_stat64 */
+#endif /* defined(SOLARIS2_5) */
+#if defined(_PR_NO_LARGE_FILES) || defined(SOLARIS2_5)
+static PROffset64 _MD_Unix_lseek64(PRIntn osfd, PROffset64 offset, PRIntn whence)
+{
+PRUint64 maxoff;
+PROffset64 rv = minus_one;
+LL_I2L(maxoff, 0x7fffffff);
+if (LL_CMP(offset, <=, maxoff))
+{
+off_t off;
+LL_L2I(off, offset);
+LL_I2L(rv, lseek(osfd, off, whence));
+}
+else errno = EFBIG;  /* we can't go there */
+return rv;
+}  /* _MD_Unix_lseek64 */
+static void* _MD_Unix_mmap64(
+void *addr, PRSize len, PRIntn prot, PRIntn flags,
+PRIntn fildes, PRInt64 offset)
+{
+PR_SetError(PR_FILE_TOO_BIG_ERROR, 0);
+return NULL;
+}  /* _MD_Unix_mmap64 */
+#endif /* defined(_PR_NO_LARGE_FILES) || defined(SOLARIS2_5) */
+/* Android doesn't have mmap64. */
+#if defined(ANDROID)
+extern void *__mmap2(void *, size_t, int, int, int, size_t);
+#define ANDROID_PAGE_SIZE 4096
+static void *
+mmap64(void *addr, size_t len, int prot, int flags, int fd, loff_t offset)
+{
+if (offset & (ANDROID_PAGE_SIZE - 1)) {
+errno = EINVAL;
+return MAP_FAILED;
+}
+return __mmap2(addr, len, prot, flags, fd, offset / ANDROID_PAGE_SIZE);
+}
+#endif
+#if defined(OSF1) && defined(__GNUC__)
+/*
+* On OSF1 V5.0A, <sys/stat.h> defines stat and fstat as
+* macros when compiled under gcc, so it is rather tricky to
+* take the addresses of the real functions the macros expend
+* to.  A simple solution is to define forwarder functions
+* and take the addresses of the forwarder functions instead.
+*/
+static int stat_forwarder(const char *path, struct stat *buffer)
+{
+return stat(path, buffer);
+}
+static int fstat_forwarder(int filedes, struct stat *buffer)
+{
+return fstat(filedes, buffer);
+}
+#endif
+static void _PR_InitIOV(void)
+{
+#if defined(SOLARIS2_5)
+PRLibrary *lib;
+void *open64_func;
+open64_func = PR_FindSymbolAndLibrary("open64", &lib);
+if (NULL != open64_func)
+{
+PR_ASSERT(NULL != lib);
+_md_iovector._open64 = (_MD_Open64)open64_func;
+_md_iovector._mmap64 = (_MD_Mmap64)PR_FindSymbol(lib, "mmap64");
+_md_iovector._fstat64 = (_MD_Fstat64)PR_FindSymbol(lib, "fstat64");
+_md_iovector._stat64 = (_MD_Stat64)PR_FindSymbol(lib, "stat64");
+_md_iovector._lseek64 = (_MD_Lseek64)PR_FindSymbol(lib, "lseek64");
+(void)PR_UnloadLibrary(lib);
+}
+else
+{
+_md_iovector._open64 = open;
+_md_iovector._mmap64 = _MD_Unix_mmap64;
+_md_iovector._fstat64 = _MD_solaris25_fstat64;
+_md_iovector._stat64 = _MD_solaris25_stat64;
+_md_iovector._lseek64 = _MD_Unix_lseek64;
+}
+#elif defined(_PR_NO_LARGE_FILES)
+_md_iovector._open64 = open;
+_md_iovector._mmap64 = _MD_Unix_mmap64;
+_md_iovector._fstat64 = fstat;
+_md_iovector._stat64 = stat;
+_md_iovector._lseek64 = _MD_Unix_lseek64;
+#elif defined(_PR_HAVE_OFF64_T)
+#if defined(IRIX5_3) || defined(ANDROID)
+/*
+* Android doesn't have open64.  We pass the O_LARGEFILE flag to open
+* in _MD_open.
+*/
+_md_iovector._open64 = open;
+#else
+_md_iovector._open64 = open64;
+#endif
+_md_iovector._mmap64 = mmap64;
+_md_iovector._fstat64 = fstat64;
+_md_iovector._stat64 = stat64;
+_md_iovector._lseek64 = lseek64;
+#elif defined(_PR_HAVE_LARGE_OFF_T)
+_md_iovector._open64 = open;
+_md_iovector._mmap64 = mmap;
+#if defined(OSF1) && defined(__GNUC__)
+_md_iovector._fstat64 = fstat_forwarder;
+_md_iovector._stat64 = stat_forwarder;
+#else
+_md_iovector._fstat64 = fstat;
+_md_iovector._stat64 = stat;
+#endif
+_md_iovector._lseek64 = lseek;
+#else
+#error "I don't know yet"
+#endif
+LL_I2L(minus_one, -1);
+}  /* _PR_InitIOV */
+void _PR_UnixInit(void)
+{
+struct sigaction sigact;
+int rv;
+sigemptyset(&timer_set);
+#if !defined(_PR_PTHREADS)
+sigaddset(&timer_set, SIGALRM);
+sigemptyset(&empty_set);
+intr_timeout_ticks =
+PR_SecondsToInterval(_PR_INTERRUPT_CHECK_INTERVAL_SECS);
+#if defined(SOLARIS) || defined(IRIX)
+if (getenv("NSPR_SIGSEGV_HANDLE")) {
+sigact.sa_handler = sigsegvhandler;
+sigact.sa_flags = 0;
+sigact.sa_mask = timer_set;
+sigaction(SIGSEGV, &sigact, 0);
+}
+if (getenv("NSPR_SIGABRT_HANDLE")) {
+sigact.sa_handler = sigaborthandler;
+sigact.sa_flags = 0;
+sigact.sa_mask = timer_set;
+sigaction(SIGABRT, &sigact, 0);
+}
+if (getenv("NSPR_SIGBUS_HANDLE")) {
+sigact.sa_handler = sigbushandler;
+sigact.sa_flags = 0;
+sigact.sa_mask = timer_set;
+sigaction(SIGBUS, &sigact, 0);
+}
+#endif
+#endif  /* !defined(_PR_PTHREADS) */
+/*
+* Under HP-UX DCE threads, sigaction() installs a per-thread
+* handler, so we use sigvector() to install a process-wide
+* handler.
+*/
+#if defined(HPUX) && defined(_PR_DCETHREADS)
+{
+struct sigvec vec;
+vec.sv_handler = SIG_IGN;
+vec.sv_mask = 0;
+vec.sv_flags = 0;
+rv = sigvector(SIGPIPE, &vec, NULL);
+PR_ASSERT(0 == rv);
+}
+#else
+sigact.sa_handler = SIG_IGN;
+sigemptyset(&sigact.sa_mask);
+sigact.sa_flags = 0;
+rv = sigaction(SIGPIPE, &sigact, 0);
+PR_ASSERT(0 == rv);
+#endif /* HPUX && _PR_DCETHREADS */
+_pr_rename_lock = PR_NewLock();
+PR_ASSERT(NULL != _pr_rename_lock);
+_pr_Xfe_mon = PR_NewMonitor();
+PR_ASSERT(NULL != _pr_Xfe_mon);
+_PR_InitIOV();  /* one last hack */
+}
+void _PR_UnixCleanup(void)
+{
+if (_pr_rename_lock) {
+PR_DestroyLock(_pr_rename_lock);
+_pr_rename_lock = NULL;
+}
+if (_pr_Xfe_mon) {
+PR_DestroyMonitor(_pr_Xfe_mon);
+_pr_Xfe_mon = NULL;
+}
+}
+#if !defined(_PR_PTHREADS)
+/*
+* Variables used by the GC code, initialized in _MD_InitSegs().
+*/
+static PRInt32 _pr_zero_fd = -1;
+static PRLock *_pr_md_lock = NULL;
+/*
+* _MD_InitSegs --
+*
+* This is Unix's version of _PR_MD_INIT_SEGS(), which is
+* called by _PR_InitSegs(), which in turn is called by
+* PR_Init().
+*/
+void _MD_InitSegs(void)
+{
+#ifdef DEBUG
+/*
+** Disable using mmap(2) if NSPR_NO_MMAP is set
+*/
+if (getenv("NSPR_NO_MMAP")) {
+_pr_zero_fd = -2;
+return;
+}
+#endif
+_pr_zero_fd = open("/dev/zero",O_RDWR , 0);
+/* Prevent the fd from being inherited by child processes */
+fcntl(_pr_zero_fd, F_SETFD, FD_CLOEXEC);
+_pr_md_lock = PR_NewLock();
+}
+PRStatus _MD_AllocSegment(PRSegment *seg, PRUint32 size, void *vaddr)
+{
+static char *lastaddr = (char*) _PR_STACK_VMBASE;
+PRStatus retval = PR_SUCCESS;
+int prot;
+void *rv;
+PR_ASSERT(seg != 0);
+PR_ASSERT(size != 0);
+PR_Lock(_pr_md_lock);
+if (_pr_zero_fd < 0) {
+from_heap:
+seg->vaddr = PR_MALLOC(size);
+if (!seg->vaddr) {
+retval = PR_FAILURE;
+}
+else {
+seg->size = size;
+}
+goto exit;
+}
+prot = PROT_READ|PROT_WRITE;
+/*
+* On Alpha Linux, the user-level thread stack needs
+* to be made executable because longjmp/signal seem
+* to put machine instructions on the stack.
+*/
+#if defined(LINUX) && defined(__alpha)
+prot |= PROT_EXEC;
+#endif
+rv = mmap((vaddr != 0) ? vaddr : lastaddr, size, prot,
+_MD_MMAP_FLAGS,
+_pr_zero_fd, 0);
+if (rv == (void*)-1) {
+goto from_heap;
+}
+lastaddr += size;
+seg->vaddr = rv;
+seg->size = size;
+seg->flags = _PR_SEG_VM;
+exit:
+PR_Unlock(_pr_md_lock);
+return retval;
+}
+void _MD_FreeSegment(PRSegment *seg)
+{
+if (seg->flags & _PR_SEG_VM)
+(void) munmap(seg->vaddr, seg->size);
+else
+PR_DELETE(seg->vaddr);
+}
+#endif /* _PR_PTHREADS */
+/*
+*-----------------------------------------------------------------------
+*
+* PR_Now --
+*
+*     Returns the current time in microseconds since the epoch.
+*     The epoch is midnight January 1, 1970 GMT.
+*     The implementation is machine dependent.  This is the Unix
+*     implementation.
+*     Cf. time_t time(time_t *tp)
+*
+*-----------------------------------------------------------------------
+*/
+PR_IMPLEMENT(PRTime)
+PR_Now(void)
+{
+struct timeval tv;
+PRInt64 s, us, s2us;
+GETTIMEOFDAY(&tv);
+LL_I2L(s2us, PR_USEC_PER_SEC);
+LL_I2L(s, tv.tv_sec);
+LL_I2L(us, tv.tv_usec);
+LL_MUL(s, s, s2us);
+LL_ADD(s, s, us);
+return s;
+}
+#if defined(_MD_INTERVAL_USE_GTOD)
+/*
+* This version of interval times is based on the time of day
+* capability offered by the system. This isn't valid for two reasons:
+* 1) The time of day is neither linear nor montonically increasing
+* 2) The units here are milliseconds. That's not appropriate for our use.
+*/
+PRIntervalTime _PR_UNIX_GetInterval()
+{
+struct timeval time;
+PRIntervalTime ticks;
+(void)GETTIMEOFDAY(&time);  /* fallicy of course */
+ticks = (PRUint32)time.tv_sec * PR_MSEC_PER_SEC;  /* that's in milliseconds */
+ticks += (PRUint32)time.tv_usec / PR_USEC_PER_MSEC;  /* so's that */
+return ticks;
+}  /* _PR_UNIX_GetInterval */
+PRIntervalTime _PR_UNIX_TicksPerSecond()
+{
+return 1000;  /* this needs some work :) */
+}
+#endif
+#if defined(HAVE_CLOCK_MONOTONIC)
+PRIntervalTime _PR_UNIX_GetInterval2()
+{
+struct timespec time;
+PRIntervalTime ticks;
+if (clock_gettime(CLOCK_MONOTONIC, &time) != 0) {
+fprintf(stderr, "clock_gettime failed: %d\n", errno);
+abort();
+}
+ticks = (PRUint32)time.tv_sec * PR_MSEC_PER_SEC;
+ticks += (PRUint32)time.tv_nsec / PR_NSEC_PER_MSEC;
+return ticks;
+}
+PRIntervalTime _PR_UNIX_TicksPerSecond2()
+{
+return 1000;
+}
+#endif
+#if !defined(_PR_PTHREADS)
+/*
+* Wait for I/O on multiple descriptors.
+*
+* Return 0 if timed out, return -1 if interrupted,
+* else return the number of ready descriptors.
+*/
+PRInt32 _PR_WaitForMultipleFDs(
+_PRUnixPollDesc *unixpds,
+PRInt32 pdcnt,
+PRIntervalTime timeout)
+{
+PRPollQueue pq;
+PRIntn is;
+PRInt32 rv;
+_PRCPU *io_cpu;
+_PRUnixPollDesc *unixpd, *eunixpd;
+PRThread *me = _PR_MD_CURRENT_THREAD();
+PR_ASSERT(!(me->flags & _PR_IDLE_THREAD));
+if (_PR_PENDING_INTERRUPT(me)) {
+me->flags &= ~_PR_INTERRUPT;
+PR_SetError(PR_PENDING_INTERRUPT_ERROR, 0);
+return -1;
+}
+pq.pds = unixpds;
+pq.npds = pdcnt;
+_PR_INTSOFF(is);
+_PR_MD_IOQ_LOCK();
+_PR_THREAD_LOCK(me);
+pq.thr = me;
+io_cpu = me->cpu;
+pq.on_ioq = PR_TRUE;
+pq.timeout = timeout;
+_PR_ADD_TO_IOQ(pq, me->cpu);
+#if !defined(_PR_USE_POLL)
+eunixpd = unixpds + pdcnt;
+for (unixpd = unixpds; unixpd < eunixpd; unixpd++) {
+PRInt32 osfd = unixpd->osfd;
+if (unixpd->in_flags & _PR_UNIX_POLL_READ) {
+FD_SET(osfd, &_PR_FD_READ_SET(me->cpu));
+_PR_FD_READ_CNT(me->cpu)[osfd]++;
+}
+if (unixpd->in_flags & _PR_UNIX_POLL_WRITE) {
+FD_SET(osfd, &_PR_FD_WRITE_SET(me->cpu));
+(_PR_FD_WRITE_CNT(me->cpu))[osfd]++;
+}
+if (unixpd->in_flags & _PR_UNIX_POLL_EXCEPT) {
+FD_SET(osfd, &_PR_FD_EXCEPTION_SET(me->cpu));
+(_PR_FD_EXCEPTION_CNT(me->cpu))[osfd]++;
+}
+if (osfd > _PR_IOQ_MAX_OSFD(me->cpu)) {
+_PR_IOQ_MAX_OSFD(me->cpu) = osfd;
+}
+}
+#endif  /* !defined(_PR_USE_POLL) */
+if (_PR_IOQ_TIMEOUT(me->cpu) > timeout) {
+_PR_IOQ_TIMEOUT(me->cpu) = timeout;
+}
+_PR_IOQ_OSFD_CNT(me->cpu) += pdcnt;
+_PR_SLEEPQ_LOCK(me->cpu);
+_PR_ADD_SLEEPQ(me, timeout);
+me->state = _PR_IO_WAIT;
+me->io_pending = PR_TRUE;
+me->io_suspended = PR_FALSE;
+_PR_SLEEPQ_UNLOCK(me->cpu);
+_PR_THREAD_UNLOCK(me);
+_PR_MD_IOQ_UNLOCK();
+_PR_MD_WAIT(me, timeout);
+me->io_pending = PR_FALSE;
+me->io_suspended = PR_FALSE;
+/*
+* This thread should run on the same cpu on which it was blocked; when
+* the IO request times out the fd sets and fd counts for the
+* cpu are updated below.
+*/
+PR_ASSERT(me->cpu == io_cpu);
+/*
+** If we timed out the pollq might still be on the ioq. Remove it
+** before continuing.
+*/
+if (pq.on_ioq) {
+_PR_MD_IOQ_LOCK();
+/*
+* Need to check pq.on_ioq again
+*/
+if (pq.on_ioq) {
+PR_REMOVE_LINK(&pq.links);
+#ifndef _PR_USE_POLL
+eunixpd = unixpds + pdcnt;
+for (unixpd = unixpds; unixpd < eunixpd; unixpd++) {
+PRInt32 osfd = unixpd->osfd;
+PRInt16 in_flags = unixpd->in_flags;
+if (in_flags & _PR_UNIX_POLL_READ) {
+if (--(_PR_FD_READ_CNT(me->cpu))[osfd] == 0)
+FD_CLR(osfd, &_PR_FD_READ_SET(me->cpu));
+}
+if (in_flags & _PR_UNIX_POLL_WRITE) {
+if (--(_PR_FD_WRITE_CNT(me->cpu))[osfd] == 0)
+FD_CLR(osfd, &_PR_FD_WRITE_SET(me->cpu));
+}
+if (in_flags & _PR_UNIX_POLL_EXCEPT) {
+if (--(_PR_FD_EXCEPTION_CNT(me->cpu))[osfd] == 0)
+FD_CLR(osfd, &_PR_FD_EXCEPTION_SET(me->cpu));
+}
+}
+#endif  /* _PR_USE_POLL */
+PR_ASSERT(pq.npds == pdcnt);
+_PR_IOQ_OSFD_CNT(me->cpu) -= pdcnt;
+PR_ASSERT(_PR_IOQ_OSFD_CNT(me->cpu) >= 0);
+}
+_PR_MD_IOQ_UNLOCK();
+}
+/* XXX Should we use _PR_FAST_INTSON or _PR_INTSON? */
+if (1 == pdcnt) {
+_PR_FAST_INTSON(is);
+} else {
+_PR_INTSON(is);
+}
+if (_PR_PENDING_INTERRUPT(me)) {
+me->flags &= ~_PR_INTERRUPT;
+PR_SetError(PR_PENDING_INTERRUPT_ERROR, 0);
+return -1;
+}
+rv = 0;
+if (pq.on_ioq == PR_FALSE) {
+/* Count the number of ready descriptors */
+while (--pdcnt >= 0) {
+if (unixpds->out_flags != 0) {
+rv++;
+}
+unixpds++;
+}
+}
+return rv;
+}
+/*
+* Unblock threads waiting for I/O
+*    used when interrupting threads
+*
+* NOTE: The thread lock should held when this function is called.
+* On return, the thread lock is released.
+*/
+void _PR_Unblock_IO_Wait(PRThread *thr)
+{
+int pri = thr->priority;
+_PRCPU *cpu = thr->cpu;
+/*
+* GLOBAL threads wakeup periodically to check for interrupt
+*/
+if (_PR_IS_NATIVE_THREAD(thr)) {
+_PR_THREAD_UNLOCK(thr);
+return;
+}
+PR_ASSERT(thr->flags & (_PR_ON_SLEEPQ | _PR_ON_PAUSEQ));
+_PR_SLEEPQ_LOCK(cpu);
+_PR_DEL_SLEEPQ(thr, PR_TRUE);
+_PR_SLEEPQ_UNLOCK(cpu);
+PR_ASSERT(!(thr->flags & _PR_IDLE_THREAD));
+thr->state = _PR_RUNNABLE;
+_PR_RUNQ_LOCK(cpu);
+_PR_ADD_RUNQ(thr, cpu, pri);
+_PR_RUNQ_UNLOCK(cpu);
+_PR_THREAD_UNLOCK(thr);
+_PR_MD_WAKEUP_WAITER(thr);
+}
+#endif  /* !defined(_PR_PTHREADS) */
+/*
+* When a nonblocking connect has completed, determine whether it
+* succeeded or failed, and if it failed, what the error code is.
+*
+* The function returns the error code.  An error code of 0 means
+* that the nonblocking connect succeeded.
+*/
+int _MD_unix_get_nonblocking_connect_error(int osfd)
+{
+#if defined(NTO)
+/* Neutrino does not support the SO_ERROR socket option */
+PRInt32      rv;
+PRNetAddr    addr;
+_PRSockLen_t addrlen = sizeof(addr);
+/* Test to see if we are using the Tiny TCP/IP Stack or the Full one. */
+struct statvfs superblock;
+rv = fstatvfs(osfd, &superblock);
+if (rv == 0) {
+if (strcmp(superblock.f_basetype, "ttcpip") == 0) {
+/* Using the Tiny Stack! */
+rv = getpeername(osfd, (struct sockaddr *) &addr,
+(_PRSockLen_t *) &addrlen);
+if (rv == -1) {
+int errno_copy = errno;    /* make a copy so I don't
+* accidentally reset */
+if (errno_copy == ENOTCONN) {
+struct stat StatInfo;
+rv = fstat(osfd, &StatInfo);
+if (rv == 0) {
+time_t current_time = time(NULL);
+/*
+* this is a real hack, can't explain why it
+* works it just does
+*/
+if (abs(current_time - StatInfo.st_atime) < 5) {
+return ECONNREFUSED;
+} else {
+return ETIMEDOUT;
+}
+} else {
+return ECONNREFUSED;
+}
+} else {
+return errno_copy;
+}
+} else {
+/* No Error */
+return 0;
+}
+} else {
+/* Have the FULL Stack which supports SO_ERROR */
+/* Hasn't been written yet, never been tested! */
+/* Jerry.Kirk@Nexwarecorp.com */
+int err;
+_PRSockLen_t optlen = sizeof(err);
+if (getsockopt(osfd, SOL_SOCKET, SO_ERROR,
+(char *) &err, &optlen) == -1) {
+return errno;
+} else {
+return err;
+}
+}
+} else {
+return ECONNREFUSED;
+}
+#elif defined(UNIXWARE)
+/*
+* getsockopt() fails with EPIPE, so use getmsg() instead.
+*/
+int rv;
+int flags = 0;
+rv = getmsg(osfd, NULL, NULL, &flags);
+PR_ASSERT(-1 == rv || 0 == rv);
+if (-1 == rv && errno != EAGAIN && errno != EWOULDBLOCK) {
+return errno;
+}
+return 0;  /* no error */
+#else
+int err;
+_PRSockLen_t optlen = sizeof(err);
+if (getsockopt(osfd, SOL_SOCKET, SO_ERROR, (char *) &err, &optlen) == -1) {
+return errno;
+} else {
+return err;
+}
+#endif
+}
+/************************************************************************/
+/*
+** Special hacks for xlib. Xlib/Xt/Xm is not re-entrant nor is it thread
+** safe.  Unfortunately, neither is mozilla. To make these programs work
+** in a pre-emptive threaded environment, we need to use a lock.
+*/
+void PR_XLock(void)
+{
+PR_EnterMonitor(_pr_Xfe_mon);
+}
+void PR_XUnlock(void)
+{
+PR_ExitMonitor(_pr_Xfe_mon);
+}
+PRBool PR_XIsLocked(void)
+{
+return (PR_InMonitor(_pr_Xfe_mon)) ? PR_TRUE : PR_FALSE;
+}
+void PR_XWait(int ms)
+{
+PR_Wait(_pr_Xfe_mon, PR_MillisecondsToInterval(ms));
+}
+void PR_XNotify(void)
+{
+PR_Notify(_pr_Xfe_mon);
+}
+void PR_XNotifyAll(void)
+{
+PR_NotifyAll(_pr_Xfe_mon);
+}
+#if defined(HAVE_FCNTL_FILE_LOCKING)
+PRStatus
+_MD_LockFile(PRInt32 f)
+{
+PRInt32 rv;
+struct flock arg;
+arg.l_type = F_WRLCK;
+arg.l_whence = SEEK_SET;
+arg.l_start = 0;
+arg.l_len = 0;  /* until EOF */
+rv = fcntl(f, F_SETLKW, &arg);
+if (rv == 0)
+return PR_SUCCESS;
+_PR_MD_MAP_FLOCK_ERROR(_MD_ERRNO());
+return PR_FAILURE;
+}
+PRStatus
+_MD_TLockFile(PRInt32 f)
+{
+PRInt32 rv;
+struct flock arg;
+arg.l_type = F_WRLCK;
+arg.l_whence = SEEK_SET;
+arg.l_start = 0;
+arg.l_len = 0;  /* until EOF */
+rv = fcntl(f, F_SETLK, &arg);
+if (rv == 0)
+return PR_SUCCESS;
+_PR_MD_MAP_FLOCK_ERROR(_MD_ERRNO());
+return PR_FAILURE;
+}
+PRStatus
+_MD_UnlockFile(PRInt32 f)
+{
+PRInt32 rv;
+struct flock arg;
+arg.l_type = F_UNLCK;
+arg.l_whence = SEEK_SET;
+arg.l_start = 0;
+arg.l_len = 0;  /* until EOF */
+rv = fcntl(f, F_SETLK, &arg);
+if (rv == 0)
+return PR_SUCCESS;
+_PR_MD_MAP_FLOCK_ERROR(_MD_ERRNO());
+return PR_FAILURE;
+}
+#elif defined(HAVE_BSD_FLOCK)
+#include <sys/file.h>
+PRStatus
+_MD_LockFile(PRInt32 f)
+{
+PRInt32 rv;
+rv = flock(f, LOCK_EX);
+if (rv == 0)
+return PR_SUCCESS;
+_PR_MD_MAP_FLOCK_ERROR(_MD_ERRNO());
+return PR_FAILURE;
+}
+PRStatus
+_MD_TLockFile(PRInt32 f)
+{
+PRInt32 rv;
+rv = flock(f, LOCK_EX|LOCK_NB);
+if (rv == 0)
+return PR_SUCCESS;
+_PR_MD_MAP_FLOCK_ERROR(_MD_ERRNO());
+return PR_FAILURE;
+}
+PRStatus
+_MD_UnlockFile(PRInt32 f)
+{
+PRInt32 rv;
+rv = flock(f, LOCK_UN);
+if (rv == 0)
+return PR_SUCCESS;
+_PR_MD_MAP_FLOCK_ERROR(_MD_ERRNO());
+return PR_FAILURE;
+}
+#else
+PRStatus
+_MD_LockFile(PRInt32 f)
+{
+PRInt32 rv;
+rv = lockf(f, F_LOCK, 0);
+if (rv == 0)
+return PR_SUCCESS;
+_PR_MD_MAP_LOCKF_ERROR(_MD_ERRNO());
+return PR_FAILURE;
+}
+PRStatus
+_MD_TLockFile(PRInt32 f)
+{
+PRInt32 rv;
+rv = lockf(f, F_TLOCK, 0);
+if (rv == 0)
+return PR_SUCCESS;
+_PR_MD_MAP_LOCKF_ERROR(_MD_ERRNO());
+return PR_FAILURE;
+}
+PRStatus
+_MD_UnlockFile(PRInt32 f)
+{
+PRInt32 rv;
+rv = lockf(f, F_ULOCK, 0);
+if (rv == 0)
+return PR_SUCCESS;
+_PR_MD_MAP_LOCKF_ERROR(_MD_ERRNO());
+return PR_FAILURE;
+}
+#endif
+PRStatus _MD_gethostname(char *name, PRUint32 namelen)
+{
+PRIntn rv;
+rv = gethostname(name, namelen);
+if (0 == rv) {
+return PR_SUCCESS;
+}
+_PR_MD_MAP_GETHOSTNAME_ERROR(_MD_ERRNO());
+return PR_FAILURE;
+}
+PRStatus _MD_getsysinfo(PRSysInfo cmd, char *name, PRUint32 namelen)
+{
+	struct utsname info;
+	PR_ASSERT((cmd == PR_SI_SYSNAME) || (cmd == PR_SI_RELEASE));
+	if (uname(&info) == -1) {
+		_PR_MD_MAP_DEFAULT_ERROR(errno);
+	return PR_FAILURE;
+	}
+	if (PR_SI_SYSNAME == cmd)
+		(void)PR_snprintf(name, namelen, info.sysname);
+	else if (PR_SI_RELEASE == cmd)
+		(void)PR_snprintf(name, namelen, info.release);
+	else
+		return PR_FAILURE;
+return PR_SUCCESS;
+}
+/*
+*******************************************************************
+*
+* Memory-mapped files
+*
+*******************************************************************
+*/
+PRStatus _MD_CreateFileMap(PRFileMap *fmap, PRInt64 size)
+{
+PRFileInfo info;
+PRUint32 sz;
+LL_L2UI(sz, size);
+if (sz) {
+if (PR_GetOpenFileInfo(fmap->fd, &info) == PR_FAILURE) {
+return PR_FAILURE;
+}
+if (sz > info.size) {
+/*
+* Need to extend the file
+*/
+if (fmap->prot != PR_PROT_READWRITE) {
+PR_SetError(PR_NO_ACCESS_RIGHTS_ERROR, 0);
+return PR_FAILURE;
+}
+if (PR_Seek(fmap->fd, sz - 1, PR_SEEK_SET) == -1) {
+return PR_FAILURE;
+}
+if (PR_Write(fmap->fd, "", 1) != 1) {
+return PR_FAILURE;
+}
+}
+}
+if (fmap->prot == PR_PROT_READONLY) {
+fmap->md.prot = PROT_READ;
+#ifdef OSF1V4_MAP_PRIVATE_BUG
+/*
+* Use MAP_SHARED to work around a bug in OSF1 V4.0D
+* (QAR 70220 in the OSF_QAR database) that results in
+* corrupted data in the memory-mapped region.  This
+* bug is fixed in V5.0.
+*/
+fmap->md.flags = MAP_SHARED;
+#else
+fmap->md.flags = MAP_PRIVATE;
+#endif
+} else if (fmap->prot == PR_PROT_READWRITE) {
+fmap->md.prot = PROT_READ | PROT_WRITE;
+fmap->md.flags = MAP_SHARED;
+} else {
+PR_ASSERT(fmap->prot == PR_PROT_WRITECOPY);
+fmap->md.prot = PROT_READ | PROT_WRITE;
+fmap->md.flags = MAP_PRIVATE;
+}
+return PR_SUCCESS;
+}
+void * _MD_MemMap(
+PRFileMap *fmap,
+PRInt64 offset,
+PRUint32 len)
+{
+PRInt32 off;
+void *addr;
+LL_L2I(off, offset);
+if ((addr = mmap(0, len, fmap->md.prot, fmap->md.flags,
+fmap->fd->secret->md.osfd, off)) == (void *) -1) {
+_PR_MD_MAP_MMAP_ERROR(_MD_ERRNO());
+addr = NULL;
+}
+return addr;
+}
+PRStatus _MD_MemUnmap(void *addr, PRUint32 len)
+{
+if (munmap(addr, len) == 0) {
+return PR_SUCCESS;
+}
+_PR_MD_MAP_DEFAULT_ERROR(errno);
+return PR_FAILURE;
+}
+PRStatus _MD_CloseFileMap(PRFileMap *fmap)
+{
+if ( PR_TRUE == fmap->md.isAnonFM ) {
+PRStatus rc = PR_Close( fmap->fd );
+if ( PR_FAILURE == rc ) {
+PR_LOG( _pr_io_lm, PR_LOG_DEBUG,
+("_MD_CloseFileMap(): error closing anonymnous file map osfd"));
+return PR_FAILURE;
+}
+}
+PR_DELETE(fmap);
+return PR_SUCCESS;
+}
+PRStatus _MD_SyncMemMap(
+PRFileDesc *fd,
+void *addr,
+PRUint32 len)
+{
+/* msync(..., MS_SYNC) alone is sufficient to flush modified data to disk
+* synchronously. It is not necessary to call fsync. */
+if (msync(addr, len, MS_SYNC) == 0) {
+return PR_SUCCESS;
+}
+_PR_MD_MAP_DEFAULT_ERROR(errno);
+return PR_FAILURE;
+}
+#if defined(_PR_NEED_FAKE_POLL)
+/*
+* Some platforms don't have poll().  For easier porting of code
+* that calls poll(), we emulate poll() using select().
+*/
+int poll(struct pollfd *filedes, unsigned long nfds, int timeout)
+{
+int i;
+int rv;
+int maxfd;
+fd_set rd, wr, ex;
+struct timeval tv, *tvp;
+if (timeout < 0 && timeout != -1) {
+errno = EINVAL;
+return -1;
+}
+if (timeout == -1) {
+tvp = NULL;
+} else {
+tv.tv_sec = timeout / 1000;
+tv.tv_usec = (timeout % 1000) * 1000;
+tvp = &tv;
+}
+maxfd = -1;
+FD_ZERO(&rd);
+FD_ZERO(&wr);
+FD_ZERO(&ex);
+for (i = 0; i < nfds; i++) {
+int osfd = filedes[i].fd;
+int events = filedes[i].events;
+PRBool fdHasEvent = PR_FALSE;
+if (osfd < 0) {
+continue;  /* Skip this osfd. */
+}
+/*
+* Map the poll events to the select fd_sets.
+*     POLLIN, POLLRDNORM  ===> readable
+*     POLLOUT, POLLWRNORM ===> writable
+*     POLLPRI, POLLRDBAND ===> exception
+*     POLLNORM, POLLWRBAND (and POLLMSG on some platforms)
+*     are ignored.
+*
+* The output events POLLERR and POLLHUP are never turned on.
+* POLLNVAL may be turned on.
+*/
+if (events & (POLLIN | POLLRDNORM)) {
+FD_SET(osfd, &rd);
+fdHasEvent = PR_TRUE;
+}
+if (events & (POLLOUT | POLLWRNORM)) {
+FD_SET(osfd, &wr);
+fdHasEvent = PR_TRUE;
+}
+if (events & (POLLPRI | POLLRDBAND)) {
+FD_SET(osfd, &ex);
+fdHasEvent = PR_TRUE;
+}
+if (fdHasEvent && osfd > maxfd) {
+maxfd = osfd;
+}
+}
+rv = select(maxfd + 1, &rd, &wr, &ex, tvp);
+/* Compute poll results */
+if (rv > 0) {
+rv = 0;
+for (i = 0; i < nfds; i++) {
+PRBool fdHasEvent = PR_FALSE;
+filedes[i].revents = 0;
+if (filedes[i].fd < 0) {
+continue;
+}
+if (FD_ISSET(filedes[i].fd, &rd)) {
+if (filedes[i].events & POLLIN) {
+filedes[i].revents |= POLLIN;
+}
+if (filedes[i].events & POLLRDNORM) {
+filedes[i].revents |= POLLRDNORM;
+}
+fdHasEvent = PR_TRUE;
+}
+if (FD_ISSET(filedes[i].fd, &wr)) {
+if (filedes[i].events & POLLOUT) {
+filedes[i].revents |= POLLOUT;
+}
+if (filedes[i].events & POLLWRNORM) {
+filedes[i].revents |= POLLWRNORM;
+}
+fdHasEvent = PR_TRUE;
+}
+if (FD_ISSET(filedes[i].fd, &ex)) {
+if (filedes[i].events & POLLPRI) {
+filedes[i].revents |= POLLPRI;
+}
+if (filedes[i].events & POLLRDBAND) {
+filedes[i].revents |= POLLRDBAND;
+}
+fdHasEvent = PR_TRUE;
+}
+if (fdHasEvent) {
+rv++;
+}
+}
+PR_ASSERT(rv > 0);
+} else if (rv == -1 && errno == EBADF) {
+rv = 0;
+for (i = 0; i < nfds; i++) {
+filedes[i].revents = 0;
+if (filedes[i].fd < 0) {
+continue;
+}
+if (fcntl(filedes[i].fd, F_GETFL, 0) == -1) {
+filedes[i].revents = POLLNVAL;
+rv++;
+}
+}
+PR_ASSERT(rv > 0);
+}
+PR_ASSERT(-1 != timeout || rv != 0);
+return rv;
+}
+#endif /* _PR_NEED_FAKE_POLL */

Mercurial > trustbridge > nss-cmake-static

comparison nspr/pr/src/md/unix/unix.c @ 0:1e5118fa0cb1