| Index: mozilla/nsprpub/pr/src/threads/prsem.c
|
| ===================================================================
|
| --- mozilla/nsprpub/pr/src/threads/prsem.c (revision 191424)
|
| +++ mozilla/nsprpub/pr/src/threads/prsem.c (working copy)
|
| @@ -1,138 +0,0 @@
|
| -/* -*- 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/. */
|
| -
|
| -#include "primpl.h"
|
| -#include "obsolete/prsem.h"
|
| -
|
| -/************************************************************************/
|
| -
|
| -/*
|
| -** Create a new semaphore.
|
| -*/
|
| -PR_IMPLEMENT(PRSemaphore*) PR_NewSem(PRUintn value)
|
| -{
|
| - PRSemaphore *sem;
|
| - PRCondVar *cvar;
|
| - PRLock *lock;
|
| -
|
| - sem = PR_NEWZAP(PRSemaphore);
|
| - if (sem) {
|
| -#ifdef HAVE_CVAR_BUILT_ON_SEM
|
| - _PR_MD_NEW_SEM(&sem->md, value);
|
| -#else
|
| - lock = PR_NewLock();
|
| - if (!lock) {
|
| - PR_DELETE(sem);
|
| - return NULL;
|
| - }
|
| -
|
| - cvar = PR_NewCondVar(lock);
|
| - if (!cvar) {
|
| - PR_DestroyLock(lock);
|
| - PR_DELETE(sem);
|
| - return NULL;
|
| - }
|
| - sem->cvar = cvar;
|
| - sem->count = value;
|
| -#endif
|
| - }
|
| - return sem;
|
| -}
|
| -
|
| -/*
|
| -** Destroy a semaphore. There must be no thread waiting on the semaphore.
|
| -** The caller is responsible for guaranteeing that the semaphore is
|
| -** no longer in use.
|
| -*/
|
| -PR_IMPLEMENT(void) PR_DestroySem(PRSemaphore *sem)
|
| -{
|
| -#ifdef HAVE_CVAR_BUILT_ON_SEM
|
| - _PR_MD_DESTROY_SEM(&sem->md);
|
| -#else
|
| - PR_ASSERT(sem->waiters == 0);
|
| -
|
| - PR_DestroyLock(sem->cvar->lock);
|
| - PR_DestroyCondVar(sem->cvar);
|
| -#endif
|
| - PR_DELETE(sem);
|
| -}
|
| -
|
| -/*
|
| -** Wait on a Semaphore.
|
| -**
|
| -** This routine allows a calling thread to wait or proceed depending upon the
|
| -** state of the semahore sem. The thread can proceed only if the counter value
|
| -** of the semaphore sem is currently greater than 0. If the value of semaphore
|
| -** sem is positive, it is decremented by one and the routine returns immediately
|
| -** allowing the calling thread to continue. If the value of semaphore sem is 0,
|
| -** the calling thread blocks awaiting the semaphore to be released by another
|
| -** thread.
|
| -**
|
| -** This routine can return PR_PENDING_INTERRUPT if the waiting thread
|
| -** has been interrupted.
|
| -*/
|
| -PR_IMPLEMENT(PRStatus) PR_WaitSem(PRSemaphore *sem)
|
| -{
|
| - PRStatus status = PR_SUCCESS;
|
| -
|
| -#ifdef HAVE_CVAR_BUILT_ON_SEM
|
| - return _PR_MD_WAIT_SEM(&sem->md);
|
| -#else
|
| - PR_Lock(sem->cvar->lock);
|
| - while (sem->count == 0) {
|
| - sem->waiters++;
|
| - status = PR_WaitCondVar(sem->cvar, PR_INTERVAL_NO_TIMEOUT);
|
| - sem->waiters--;
|
| - if (status != PR_SUCCESS)
|
| - break;
|
| - }
|
| - if (status == PR_SUCCESS)
|
| - sem->count--;
|
| - PR_Unlock(sem->cvar->lock);
|
| -#endif
|
| -
|
| - return (status);
|
| -}
|
| -
|
| -/*
|
| -** This routine increments the counter value of the semaphore. If other threads
|
| -** are blocked for the semaphore, then the scheduler will determine which ONE
|
| -** thread will be unblocked.
|
| -*/
|
| -PR_IMPLEMENT(void) PR_PostSem(PRSemaphore *sem)
|
| -{
|
| -#ifdef HAVE_CVAR_BUILT_ON_SEM
|
| - _PR_MD_POST_SEM(&sem->md);
|
| -#else
|
| - PR_Lock(sem->cvar->lock);
|
| - if (sem->waiters)
|
| - PR_NotifyCondVar(sem->cvar);
|
| - sem->count++;
|
| - PR_Unlock(sem->cvar->lock);
|
| -#endif
|
| -}
|
| -
|
| -#if DEBUG
|
| -/*
|
| -** Returns the value of the semaphore referenced by sem without affecting
|
| -** the state of the semaphore. The value represents the semaphore vaule
|
| -** at the time of the call, but may not be the actual value when the
|
| -** caller inspects it. (FOR DEBUGGING ONLY)
|
| -*/
|
| -PR_IMPLEMENT(PRUintn) PR_GetValueSem(PRSemaphore *sem)
|
| -{
|
| - PRUintn rv;
|
| -
|
| -#ifdef HAVE_CVAR_BUILT_ON_SEM
|
| - rv = _PR_MD_GET_VALUE_SEM(&sem->md);
|
| -#else
|
| - PR_Lock(sem->cvar->lock);
|
| - rv = sem->count;
|
| - PR_Unlock(sem->cvar->lock);
|
| -#endif
|
| -
|
| - return rv;
|
| -}
|
| -#endif
|
|
|