C++ PZ_Unlock函数代码示例

void
terminateWorkerThreads(void)
{
    int i;

    VLOG(("httpserv: server_thread: waiting on stopping"));
    PZ_Lock(qLock);
    PZ_NotifyAllCondVar(jobQNotEmptyCv);
    PZ_Unlock(qLock);

    /* Wait for worker threads to terminate. */
    for (i = 0; i < maxThreads; ++i) {
        perThread *slot = threads + i;
        if (slot->prThread) {
            PR_JoinThread(slot->prThread);
        }
    }

    /* The worker threads empty the jobQ before they terminate. */
    PZ_Lock(qLock);
    PORT_Assert(threadCount == 0);
    PORT_Assert(PR_CLIST_IS_EMPTY(&jobQ));
    PZ_Unlock(qLock);

    DESTROY_CONDVAR(jobQNotEmptyCv);
    DESTROY_CONDVAR(freeListNotEmptyCv);
    DESTROY_CONDVAR(threadCountChangeCv);

    PR_DestroyLock(lastLoadedCrlLock);
    DESTROY_LOCK(qLock);
    PR_Free(jobTable);
    PR_Free(threads);
}

static void
port_ArenaRelease(PLArenaPool *arena, void *mark, PRBool zero)
{
    PORTArenaPool *pool = (PORTArenaPool *)arena;
    if (ARENAPOOL_MAGIC == pool->magic ) {
	PZ_Lock(pool->lock);
#ifdef THREADMARK
	{
	    threadmark_mark **pw, *tm;

	    if (PR_GetCurrentThread() != pool->marking_thread ) {
		PZ_Unlock(pool->lock);
		PORT_SetError(SEC_ERROR_NO_MEMORY);
		PORT_Assert(0);
		return /* no error indication available */ ;
	    }

	    pw = &pool->first_mark;
	    while( *pw && (mark != (*pw)->mark) ) {
		pw = &(*pw)->next;
	    }

	    if (! *pw ) {
		/* bad mark */
		PZ_Unlock(pool->lock);
		PORT_SetError(SEC_ERROR_NO_MEMORY);
		PORT_Assert(0);
		return /* no error indication available */ ;
	    }

	    tm = *pw;
	    *pw = (threadmark_mark *)NULL;

	    if (zero) {
		port_ArenaZeroAfterMark(arena, mark);
	    }
	    PL_ARENA_RELEASE(arena, mark);

	    if (! pool->first_mark ) {
		pool->marking_thread = (PRThread *)NULL;
	    }
	}
#else /* THREADMARK */
	if (zero) {
	    port_ArenaZeroAfterMark(arena, mark);
	}
	PL_ARENA_RELEASE(arena, mark);
#endif /* THREADMARK */
	PZ_Unlock(pool->lock);
    } else {
	if (zero) {
	    port_ArenaZeroAfterMark(arena, mark);
	}
	PL_ARENA_RELEASE(arena, mark);
    }
}

void *
PORT_ArenaMark(PLArenaPool *arena)
{
    void * result;

    PORTArenaPool *pool = (PORTArenaPool *)arena;
    if (ARENAPOOL_MAGIC == pool->magic ) {
	PZ_Lock(pool->lock);
#ifdef THREADMARK
	{
	  threadmark_mark *tm, **pw;
	  PRThread * currentThread = PR_GetCurrentThread();

	    if (! pool->marking_thread ) {
		/* First mark */
		pool->marking_thread = currentThread;
	    } else if (currentThread != pool->marking_thread ) {
		PZ_Unlock(pool->lock);
		PORT_SetError(SEC_ERROR_NO_MEMORY);
		PORT_Assert(0);
		return NULL;
	    }

	    result = PL_ARENA_MARK(arena);
	    PL_ARENA_ALLOCATE(tm, arena, sizeof(threadmark_mark));
	    if (!tm) {
		PZ_Unlock(pool->lock);
		PORT_SetError(SEC_ERROR_NO_MEMORY);
		return NULL;
	    }

	    tm->mark = result;
	    tm->next = (threadmark_mark *)NULL;

	    pw = &pool->first_mark;
	    while( *pw ) {
		 pw = &(*pw)->next;
	    }

	    *pw = tm;
	}
#else /* THREADMARK */
	result = PL_ARENA_MARK(arena);
#endif /* THREADMARK */
	PZ_Unlock(pool->lock);
    } else {
	/* a "pure" NSPR arena */
	result = PL_ARENA_MARK(arena);
    }
    return result;
}

NSS_IMPLEMENT void
nssTrustDomain_UnlockCertCache (
  NSSTrustDomain *td
)
{
    PZ_Unlock(td->cache->lock);
}

void
nssSlot_ExitMonitor(NSSSlot *slot)
{
    if (slot->lock) {
	PZ_Unlock(slot->lock);
    }
}

NSS_IMPLEMENT PRStatus
nssSession_ExitMonitor (
  nssSession *s
)
{
    return (s->lock) ? PZ_Unlock(s->lock) : PR_SUCCESS;
}

/*
 * If zero is true, zeroize the arena memory before freeing it.
 */
void
PORT_FreeArena(PLArenaPool *arena, PRBool zero)
{
    PORTArenaPool *pool = (PORTArenaPool *)arena;
    PRLock *lock = (PRLock *)0;
    size_t len = sizeof *arena;

    if (!pool)
        return;
    if (ARENAPOOL_MAGIC == pool->magic) {
        len = sizeof *pool;
        lock = pool->lock;
        PZ_Lock(lock);
    }
    if (zero) {
        PL_ClearArenaPool(arena, 0);
    }
    (void)PR_CallOnce(&setupUseFreeListOnce, &SetupUseFreeList);
    if (useFreeList) {
        PL_FreeArenaPool(arena);
    } else {
        PL_FinishArenaPool(arena);
    }
    PORT_ZFree(arena, len);
    if (lock) {
        PZ_Unlock(lock);
        PZ_DestroyLock(lock);
    }
}

/*
 * nssHash_Add
 *
 */
NSS_IMPLEMENT PRStatus
nssHash_Add
(
  nssHash *hash,
  const void *key,
  const void *value
)
{
  PRStatus error = PR_FAILURE;
  PLHashEntry *he;

  PZ_Lock(hash->mutex);
  
  he = PL_HashTableAdd(hash->plHashTable, key, (void *)value);
  if( (PLHashEntry *)NULL == he ) {
    nss_SetError(NSS_ERROR_NO_MEMORY);
  } else if (he->value != value) {
    nss_SetError(NSS_ERROR_HASH_COLLISION);
  } else {
    hash->count++;
    error = PR_SUCCESS;
  }

  (void)PZ_Unlock(hash->mutex);

  return error;
}

int
jobLoop(PRFileDesc *a, PRFileDesc *b, int c)
{
    PRCList *myLink = 0;
    JOB *myJob;

    PZ_Lock(qLock);
    do {
        myLink = 0;
        while (PR_CLIST_IS_EMPTY(&jobQ) && !stopping) {
            PZ_WaitCondVar(jobQNotEmptyCv, PR_INTERVAL_NO_TIMEOUT);
        }
        if (!PR_CLIST_IS_EMPTY(&jobQ)) {
            myLink = PR_LIST_HEAD(&jobQ);
            PR_REMOVE_AND_INIT_LINK(myLink);
        }
        PZ_Unlock(qLock);
        myJob = (JOB *)myLink;
        /* myJob will be null when stopping is true and jobQ is empty */
        if (!myJob)
            break;
        handle_connection(myJob->tcp_sock, myJob->model_sock,
                          myJob->requestCert);
        PZ_Lock(qLock);
        PR_APPEND_LINK(myLink, &freeJobs);
        PZ_NotifyCondVar(freeListNotEmptyCv);
    } while (PR_TRUE);
    return 0;
}

/*
 * If zero is true, zeroize the arena memory before freeing it.
 */
void
PORT_FreeArena(PLArenaPool *arena, PRBool zero)
{
    PORTArenaPool *pool = (PORTArenaPool *)arena;
    PRLock *       lock = (PRLock *)0;
    size_t         len  = sizeof *arena;
    static PRBool  checkedEnv = PR_FALSE;
    static PRBool  doFreeArenaPool = PR_FALSE;

    if (!pool)
    	return;
    if (ARENAPOOL_MAGIC == pool->magic ) {
	len  = sizeof *pool;
	lock = pool->lock;
	PZ_Lock(lock);
    }
    if (!checkedEnv) {
	/* no need for thread protection here */
	doFreeArenaPool = (PR_GetEnv("NSS_DISABLE_ARENA_FREE_LIST") == NULL);
	checkedEnv = PR_TRUE;
    }
    if (zero) {
	PL_ClearArenaPool(arena, 0);
    }
    if (doFreeArenaPool) {
	PL_FreeArenaPool(arena);
    } else {
	PL_FinishArenaPool(arena);
    }
    PORT_ZFree(arena, len);
    if (lock) {
	PZ_Unlock(lock);
	PZ_DestroyLock(lock);
    }
}

/* we can only get here if we've destroyed the module, or some one has
 * erroneously freed a slot that wasn't referenced. */
void
SECMOD_SlotDestroyModule(SECMODModule *module, PRBool fromSlot) 
{
    PRBool willfree = PR_FALSE;
    if (fromSlot) {
        PORT_Assert(module->refCount == 0);
	PZ_Lock(module->refLock);
	if (module->slotCount-- == 1) {
	    willfree = PR_TRUE;
	}
	PORT_Assert(willfree || (module->slotCount > 0));
	PZ_Unlock(module->refLock);
        if (!willfree) return;
    }

    if (module == pendingModule) {
	pendingModule = NULL;
    }

    if (module->loaded) {
	SECMOD_UnloadModule(module);
    }
    PZ_DestroyLock(module->refLock);
    PORT_FreeArena(module->arena,PR_FALSE);
    secmod_PrivateModuleCount--;
}

/*
 * make a new reference to a module so It doesn't go away on us
 */
SECMODModule *
SECMOD_ReferenceModule(SECMODModule *module) 
{
    PZ_Lock(module->refLock);
    PORT_Assert(module->refCount > 0);

    module->refCount++;
    PZ_Unlock(module->refLock);
    return module;
}

void
PK11_ExitContextMonitor(PK11Context *cx) {
    /* if we own the session and our slot is ThreadSafe, only monitor
     * the Context */
    if ((cx->ownSession) && (cx->slot->isThreadSafe)) {
        /* Should this use monitors instead? */
        PZ_Unlock(cx->sessionLock);
    } else {
        PK11_ExitSlotMonitor(cx->slot);
    }
}

NSS_IMPLEMENT void
nssCertificateStore_DumpStoreInfo (
  nssCertificateStore *store,
  void (* cert_dump_iter)(const void *, void *, void *),
  void *arg
)
{
    PZ_Lock(store->lock);
    nssHash_Iterate(store->issuer_and_serial, cert_dump_iter, arg);
    PZ_Unlock(store->lock);
}

void
PORT_ArenaUnmark(PLArenaPool *arena, void *mark)
{
#ifdef THREADMARK
    PORTArenaPool *pool = (PORTArenaPool *)arena;
    if (ARENAPOOL_MAGIC == pool->magic ) {
	threadmark_mark **pw, *tm;

	PZ_Lock(pool->lock);

	if (PR_GetCurrentThread() != pool->marking_thread ) {
	    PZ_Unlock(pool->lock);
	    PORT_SetError(SEC_ERROR_NO_MEMORY);
	    PORT_Assert(0);
	    return /* no error indication available */ ;
	}

	pw = &pool->first_mark;
	while( ((threadmark_mark *)NULL != *pw) && (mark != (*pw)->mark) ) {
	    pw = &(*pw)->next;
	}

	if ((threadmark_mark *)NULL == *pw ) {
	    /* bad mark */
	    PZ_Unlock(pool->lock);
	    PORT_SetError(SEC_ERROR_NO_MEMORY);
	    PORT_Assert(0);
	    return /* no error indication available */ ;
	}

	tm = *pw;
	*pw = (threadmark_mark *)NULL;

	if (! pool->first_mark ) {
	    pool->marking_thread = (PRThread *)NULL;
	}

	PZ_Unlock(pool->lock);
    }
#endif /* THREADMARK */
}