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ntsem.c
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00001 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
00002 /* ***** BEGIN LICENSE BLOCK *****
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00015  * The Original Code is the Netscape Portable Runtime (NSPR).
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00024  * Alternatively, the contents of this file may be used under the terms of
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00037 
00038 /*
00039  * NT-specific semaphore handling code.
00040  *
00041  */
00042 
00043 
00044 #include "primpl.h"
00045 
00046 
00047 void 
00048 _PR_MD_NEW_SEM(_MDSemaphore *md, PRUintn value)
00049 {
00050     md->sem = CreateSemaphore(NULL, value, 0x7fffffff, NULL);
00051 }
00052 
00053 void 
00054 _PR_MD_DESTROY_SEM(_MDSemaphore *md)
00055 {
00056     CloseHandle(md->sem);
00057 }
00058 
00059 PRStatus 
00060 _PR_MD_TIMED_WAIT_SEM(_MDSemaphore *md, PRIntervalTime ticks)
00061 {
00062     int rv;
00063 
00064     rv = WaitForSingleObject(md->sem, PR_IntervalToMilliseconds(ticks));
00065 
00066     if (rv == WAIT_OBJECT_0)
00067         return PR_SUCCESS;
00068     else
00069         return PR_FAILURE;
00070 }
00071 
00072 PRStatus 
00073 _PR_MD_WAIT_SEM(_MDSemaphore *md)
00074 {
00075     return _PR_MD_TIMED_WAIT_SEM(md, PR_INTERVAL_NO_TIMEOUT);
00076 }
00077 
00078 void 
00079 _PR_MD_POST_SEM(_MDSemaphore *md)
00080 {
00081     int old_count;
00082 
00083     ReleaseSemaphore(md->sem, 1, &old_count);
00084 }