Mercurial > trustbridge > nss-cmake-static

annotate nspr/pr/src/md/windows/w32ipcsem.c @ 3:150b72113545

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Add DBM and legacydb support
author Andre Heinecke <andre.heinecke@intevation.de>
date Tue, 05 Aug 2014 18:32:02 +0200
parents 1e5118fa0cb1
children
rev   line source
0
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1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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2 /* This Source Code Form is subject to the terms of the Mozilla Public
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3 * License, v. 2.0. If a copy of the MPL was not distributed with this
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4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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5
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6 /*
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7 * File: w32ipcsem.c
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8 * Description: implements named semaphores for NT and WIN95.
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9 */
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10
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11 #include "primpl.h"
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12
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13 #ifdef WINCE
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14 static HANDLE OpenSemaphore(DWORD inDesiredAccess,
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15 BOOL inInheritHandle,
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16 const char *inName)
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17 {
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18 HANDLE retval = NULL;
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19 HANDLE semaphore = NULL;
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20 PRUnichar wideName[MAX_PATH]; /* name size is limited to MAX_PATH */
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21
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22 MultiByteToWideChar(CP_ACP, 0, inName, -1, wideName, MAX_PATH);
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23 /* 0x7fffffff is the max count for our semaphore */
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24 semaphore = CreateSemaphoreW(NULL, 0, 0x7fffffff, wideName);
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25 if (NULL != semaphore) {
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26 DWORD lastErr = GetLastError();
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27
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28 if (ERROR_ALREADY_EXISTS != lastErr)
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29 CloseHandle(semaphore);
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30 else
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31 retval = semaphore;
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32 }
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33 return retval;
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34 }
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35 #endif
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36
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37 /*
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38 * NSPR-to-NT access right mapping table for semaphore objects.
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39 *
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40 * The SYNCHRONIZE access is required by WaitForSingleObject.
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41 * The SEMAPHORE_MODIFY_STATE access is required by ReleaseSemaphore.
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42 * The OR of these three access masks must equal SEMAPHORE_ALL_ACCESS.
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43 * This is because if a semaphore object with the specified name
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44 * exists, CreateSemaphore requests SEMAPHORE_ALL_ACCESS access to
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45 * the existing object.
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46 */
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47 static DWORD semAccessTable[] = {
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48 STANDARD_RIGHTS_REQUIRED|0x1, /* read (0x1 is "query state") */
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49 STANDARD_RIGHTS_REQUIRED|SYNCHRONIZE|SEMAPHORE_MODIFY_STATE, /* write */
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50 0 /* execute */
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51 };
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52
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53 #ifndef _PR_GLOBAL_THREADS_ONLY
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54
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55 /*
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56 * A fiber cannot call WaitForSingleObject because that
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57 * will block the other fibers running on the same thread.
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58 * If a fiber needs to wait on a (semaphore) handle, we
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59 * create a native thread to call WaitForSingleObject and
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60 * have the fiber join the native thread.
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61 */
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62
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63 /*
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64 * Arguments, return value, and error code for WaitForSingleObject
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65 */
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66 struct WaitSingleArg {
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67 HANDLE handle;
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68 DWORD timeout;
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69 DWORD rv;
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70 DWORD error;
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71 };
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72
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73 static void WaitSingleThread(void *arg)
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74 {
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75 struct WaitSingleArg *warg = (struct WaitSingleArg *) arg;
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76
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77 warg->rv = WaitForSingleObject(warg->handle, warg->timeout);
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78 if (warg->rv == WAIT_FAILED) {
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79 warg->error = GetLastError();
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80 }
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81 }
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82
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83 static DWORD FiberSafeWaitForSingleObject(
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84 HANDLE hHandle,
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85 DWORD dwMilliseconds
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86 )
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87 {
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88 PRThread *me = _PR_MD_CURRENT_THREAD();
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89
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90 if (_PR_IS_NATIVE_THREAD(me)) {
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91 return WaitForSingleObject(hHandle, dwMilliseconds);
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92 } else {
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93 PRThread *waitThread;
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94 struct WaitSingleArg warg;
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95 PRStatus rv;
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96
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97 warg.handle = hHandle;
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98 warg.timeout = dwMilliseconds;
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99 waitThread = PR_CreateThread(
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100 PR_USER_THREAD, WaitSingleThread, &warg,
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101 PR_PRIORITY_NORMAL, PR_GLOBAL_THREAD, PR_JOINABLE_THREAD, 0);
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102 if (waitThread == NULL) {
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103 return WAIT_FAILED;
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104 }
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105
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106 rv = PR_JoinThread(waitThread);
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107 PR_ASSERT(rv == PR_SUCCESS);
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108 if (rv == PR_FAILURE) {
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109 return WAIT_FAILED;
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110 }
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111 if (warg.rv == WAIT_FAILED) {
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112 SetLastError(warg.error);
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113 }
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114 return warg.rv;
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115 }
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116 }
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117
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118 #endif /* !_PR_GLOBAL_THREADS_ONLY */
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119
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120 PRSem *_PR_MD_OPEN_SEMAPHORE(
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121 const char *osname, PRIntn flags, PRIntn mode, PRUintn value)
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122 {
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123 PRSem *sem;
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124 SECURITY_ATTRIBUTES sa;
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125 LPSECURITY_ATTRIBUTES lpSA = NULL;
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126 PSECURITY_DESCRIPTOR pSD = NULL;
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127 PACL pACL = NULL;
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128
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129 sem = PR_NEW(PRSem);
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130 if (sem == NULL) {
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131 PR_SetError(PR_OUT_OF_MEMORY_ERROR, 0);
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132 return NULL;
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
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133 }
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
134 if (flags & PR_SEM_CREATE) {
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
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diff changeset
135 if (_PR_NT_MakeSecurityDescriptorACL(mode, semAccessTable,
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
136 &pSD, &pACL) == PR_SUCCESS) {
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
137 sa.nLength = sizeof(sa);
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
138 sa.lpSecurityDescriptor = pSD;
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
139 sa.bInheritHandle = FALSE;
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
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140 lpSA = &sa;
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
141 }
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
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142 #ifdef WINCE
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Andre Heinecke <andre.heinecke@intevation.de>
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143 {
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
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144 /* The size of a sem's name is limited to MAX_PATH. */
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
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145 PRUnichar wosname[MAX_PATH];
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
146 MultiByteToWideChar(CP_ACP, 0, osname, -1, wosname, MAX_PATH);
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
147 sem->sem = CreateSemaphoreW(lpSA, value, 0x7fffffff, wosname);
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
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148 }
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
149 #else
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Andre Heinecke <andre.heinecke@intevation.de>
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diff changeset
150 sem->sem = CreateSemaphoreA(lpSA, value, 0x7fffffff, osname);
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
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151 #endif
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
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152 if (lpSA != NULL) {
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
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diff changeset
153 _PR_NT_FreeSecurityDescriptorACL(pSD, pACL);
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
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154 }
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
155 if (sem->sem == NULL) {
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
156 _PR_MD_MAP_DEFAULT_ERROR(GetLastError());
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Andre Heinecke <andre.heinecke@intevation.de>
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157 PR_DELETE(sem);
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
158 return NULL;
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
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159 }
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
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diff changeset
160 if ((flags & PR_SEM_EXCL) && (GetLastError() == ERROR_ALREADY_EXISTS)) {
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
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161 PR_SetError(PR_FILE_EXISTS_ERROR, ERROR_ALREADY_EXISTS);
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
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162 CloseHandle(sem->sem);
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
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163 PR_DELETE(sem);
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
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164 return NULL;
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
165 }
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
166 } else {
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
167 sem->sem = OpenSemaphore(
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
168 SEMAPHORE_MODIFY_STATE|SYNCHRONIZE, FALSE, osname);
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
169 if (sem->sem == NULL) {
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Andre Heinecke <andre.heinecke@intevation.de>
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diff changeset
170 DWORD err = GetLastError();
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
171
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
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diff changeset
172 /*
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
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173 * If we open a nonexistent named semaphore, NT
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
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174 * returns ERROR_FILE_NOT_FOUND, while Win95
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
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175 * returns ERROR_INVALID_NAME
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
176 */
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
177 if (err == ERROR_INVALID_NAME) {
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
178 PR_SetError(PR_FILE_NOT_FOUND_ERROR, err);
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
179 } else {
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
180 _PR_MD_MAP_DEFAULT_ERROR(GetLastError());
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
181 }
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
182 PR_DELETE(sem);
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
183 return NULL;
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
184 }
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
185 }
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
186 return sem;
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
187 }
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
188
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
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diff changeset
189 PRStatus _PR_MD_WAIT_SEMAPHORE(PRSem *sem)
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
190 {
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
191 DWORD rv;
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
192
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
193 #ifdef _PR_GLOBAL_THREADS_ONLY
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
194 rv = WaitForSingleObject(sem->sem, INFINITE);
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
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195 #else
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
196 rv = FiberSafeWaitForSingleObject(sem->sem, INFINITE);
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
197 #endif
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
198 PR_ASSERT(rv == WAIT_FAILED || rv == WAIT_OBJECT_0);
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
199 if (rv == WAIT_FAILED) {
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
200 _PR_MD_MAP_DEFAULT_ERROR(GetLastError());
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
201 return PR_FAILURE;
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
202 }
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
203 if (rv != WAIT_OBJECT_0) {
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
204 /* Should not happen */
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
205 PR_SetError(PR_UNKNOWN_ERROR, 0);
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
206 return PR_FAILURE;
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
207 }
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
208 return PR_SUCCESS;
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
209 }
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
210
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
211 PRStatus _PR_MD_POST_SEMAPHORE(PRSem *sem)
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
212 {
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
213 if (ReleaseSemaphore(sem->sem, 1, NULL) == FALSE) {
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
214 _PR_MD_MAP_DEFAULT_ERROR(GetLastError());
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
215 return PR_FAILURE;
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
216 }
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
217 return PR_SUCCESS;
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
218 }
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
219
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
220 PRStatus _PR_MD_CLOSE_SEMAPHORE(PRSem *sem)
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
221 {
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
222 if (CloseHandle(sem->sem) == FALSE) {
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
223 _PR_MD_MAP_CLOSE_ERROR(GetLastError());
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
224 return PR_FAILURE;
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
225 }
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
226 PR_DELETE(sem);
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
227 return PR_SUCCESS;
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
228 }
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