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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* 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/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.apache.org/licenses/LICENSE-2.0 .
*/
#include "system.h"
#include <osl/semaphor.h>
#include <osl/diagnose.h>
/* This is the (default) POSIX thread-local semaphore variant */
/*
Implemetation notes:
The void* represented by oslSemaphore is used
as a pointer to an sem_t struct
*/
/*****************************************************************************/
/* osl_createSemaphore */
/*****************************************************************************/
oslSemaphore SAL_CALL osl_createSemaphore(sal_uInt32 initialCount)
{
int ret = 0;
oslSemaphore Semaphore;
Semaphore= malloc(sizeof(sem_t));
OSL_ASSERT(Semaphore); /* ptr valid? */
if ( Semaphore == 0 )
{
return 0;
}
/* unnamed semaphore, not shared between processes */
ret= sem_init((sem_t*)Semaphore, 0, initialCount);
/* create failed? */
if (ret != 0)
{
OSL_TRACE("osl_createSemaphore failed. Errno: %d; %s\n",
errno,
strerror(errno));
free(Semaphore);
Semaphore = NULL;
}
return Semaphore;
}
/*****************************************************************************/
/* osl_destroySemaphore */
/*****************************************************************************/
void SAL_CALL osl_destroySemaphore(oslSemaphore Semaphore)
{
if(Semaphore) /* ptr valid? */
{
sem_destroy((sem_t*)Semaphore);
free(Semaphore);
}
}
/*****************************************************************************/
/* osl_acquireSemaphore */
/*****************************************************************************/
sal_Bool SAL_CALL osl_acquireSemaphore(oslSemaphore Semaphore) {
OSL_ASSERT(Semaphore != 0); /* abort in debug mode */
if (Semaphore != 0) /* be tolerant in release mode */
{
return (sem_wait((sem_t*)Semaphore) == 0);
}
return sal_False;
}
/*****************************************************************************/
/* osl_tryToAcquireSemaphore */
/*****************************************************************************/
sal_Bool SAL_CALL osl_tryToAcquireSemaphore(oslSemaphore Semaphore) {
OSL_ASSERT(Semaphore != 0); /* abort in debug mode */
if (Semaphore != 0) /* be tolerant in release mode */
{
return (sem_trywait((sem_t*)Semaphore) == 0);
}
return sal_False;
}
/*****************************************************************************/
/* osl_releaseSemaphore */
/*****************************************************************************/
sal_Bool SAL_CALL osl_releaseSemaphore(oslSemaphore Semaphore) {
OSL_ASSERT(Semaphore != 0); /* abort in debug mode */
if (Semaphore != 0) /* be tolerant in release mode */
{
return (sem_post((sem_t*)Semaphore) == 0);
}
return sal_False;
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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