--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/nspr/pr/src/io/prmmap.c	Mon Jul 28 10:47:06 2014 +0200
@@ -0,0 +1,69 @@
+/* -*- 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/. */
+
+/*
+ *********************************************************************
+ *
+ * Memory-mapped files
+ *
+ *********************************************************************
+ */
+
+#include "primpl.h"
+
+PR_IMPLEMENT(PRFileMap *) PR_CreateFileMap(
+    PRFileDesc *fd,
+    PRInt64 size,
+    PRFileMapProtect prot)
+{
+    PRFileMap *fmap;
+
+    PR_ASSERT(prot == PR_PROT_READONLY || prot == PR_PROT_READWRITE
+            || prot == PR_PROT_WRITECOPY);
+    fmap = PR_NEWZAP(PRFileMap);
+    if (NULL == fmap) {
+	PR_SetError(PR_OUT_OF_MEMORY_ERROR, 0);
+	return NULL;
+    }
+    fmap->fd = fd;
+    fmap->prot = prot;
+    if (_PR_MD_CREATE_FILE_MAP(fmap, size) == PR_SUCCESS) {
+	return fmap;
+    } else {
+	PR_DELETE(fmap);
+	return NULL;
+    }
+}
+
+PR_IMPLEMENT(PRInt32) PR_GetMemMapAlignment(void)
+{
+    return _PR_MD_GET_MEM_MAP_ALIGNMENT();
+}
+
+PR_IMPLEMENT(void *) PR_MemMap(
+    PRFileMap *fmap,
+    PROffset64 offset,
+    PRUint32 len)
+{
+    return _PR_MD_MEM_MAP(fmap, offset, len);
+}
+
+PR_IMPLEMENT(PRStatus) PR_MemUnmap(void *addr, PRUint32 len)
+{
+    return _PR_MD_MEM_UNMAP(addr, len);
+}
+
+PR_IMPLEMENT(PRStatus) PR_CloseFileMap(PRFileMap *fmap)
+{
+    return _PR_MD_CLOSE_FILE_MAP(fmap);
+}
+
+PR_IMPLEMENT(PRStatus) PR_SyncMemMap(
+    PRFileDesc *fd,
+    void *addr,
+    PRUint32 len)
+{
+  return _PR_MD_SYNC_MEM_MAP(fd, addr, len);
+}