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fff98f6316
git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@3693 d0543943-73ff-0310-b7d9-9358b9ac24b2
117 lines
3.1 KiB
C
117 lines
3.1 KiB
C
/* -*- Mode: C++; c-basic-offset: 4 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is the Netscape Portable Runtime (NSPR).
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998-2000
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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/*
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** File: btlocks.c
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** Description: Implemenation for thread locks using bthreads
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** Exports: prlock.h
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*/
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#include "primpl.h"
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#include <string.h>
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#include <sys/time.h>
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void
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_PR_InitLocks (void)
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{
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}
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PR_IMPLEMENT(PRLock*)
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PR_NewLock (void)
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{
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PRLock *lock;
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status_t semresult;
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if (!_pr_initialized) _PR_ImplicitInitialization();
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lock = PR_NEWZAP(PRLock);
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if (lock != NULL) {
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lock->benaphoreCount = 0;
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lock->semaphoreID = create_sem( 0, "nsprLockSem" );
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if( lock->semaphoreID < B_NO_ERROR ) {
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PR_DELETE( lock );
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lock = NULL;
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}
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}
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return lock;
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}
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PR_IMPLEMENT(void)
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PR_DestroyLock (PRLock* lock)
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{
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status_t result;
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PR_ASSERT(NULL != lock);
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result = delete_sem(lock->semaphoreID);
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PR_ASSERT(result == B_NO_ERROR);
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PR_DELETE(lock);
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}
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PR_IMPLEMENT(void)
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PR_Lock (PRLock* lock)
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{
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PR_ASSERT(lock != NULL);
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if( atomic_add( &lock->benaphoreCount, 1 ) > 0 ) {
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if( acquire_sem(lock->semaphoreID ) != B_NO_ERROR ) {
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atomic_add( &lock->benaphoreCount, -1 );
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return;
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}
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}
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lock->owner = find_thread( NULL );
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}
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PR_IMPLEMENT(PRStatus)
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PR_Unlock (PRLock* lock)
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{
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PR_ASSERT(lock != NULL);
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lock->owner = NULL;
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if( atomic_add( &lock->benaphoreCount, -1 ) > 1 ) {
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release_sem_etc( lock->semaphoreID, 1, B_DO_NOT_RESCHEDULE );
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}
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return PR_SUCCESS;
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}
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