C++ (Cpp) fthYield примеры использования

Пример #1

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Файл: fthXLock.c Проект: AlfredChenxf/zetascale

/**
 * @brief Wait for cross lock (callable from fth thread ONLY).
 *
 * @param cross <IN> cross lock structure pointer
 * @param write <IN> Nonzero for write lock, zero for read lock
 */
void fthXLock(XLock_t *cross, int write) {

    // Wait for the fth lock to be free
    while (__sync_val_compare_and_swap(&cross->fthLock, 0, 1) != 0) {
        fthYield(0);
    }

    // Now aquire the queing lock (should be free except for race)
    while (pthread_rwlock_trywrlock(&cross->qLock) != 0) {
        // Another fthread might be waiting for the lock - avoid race
        fthYield(0);                         // Avoid race between 2 fthreads
    }

     // Release the FTH lock now that we have the Q lock
    (void) __sync_fetch_and_sub(&cross->fthLock, 1);

    // Now we have the pthread queueing lock so everyone will wait behind us
    if (write) {
        while (pthread_rwlock_trywrlock(&cross->lock) != 0) { // Try to get it
            fthYield(0);                     // Let everyone else run
        }
    } else {
        while (pthread_rwlock_tryrdlock(&cross->lock) != 0) { // Try to get it
            fthYield(0);                     // Let everyone else run
        }
   }

    // Release the Q lock now that we have the full lock
    pthread_rwlock_unlock(&cross->qLock);

}

Пример #2

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Файл: fthSparseTest.c Проект: AlfredChenxf/zetascale

void initThread(uint64_t arg) {
    fthWaitEl_t *wait = fthLock(&lock1, 1, NULL);
    slt = FTH_MALLOC(FTH_SPARSE_LOCK_TABLE_SIZE(16));
    fthSparseLockTableInit(slt, 16);
    
    fthResume(fthSpawn(&threadRoutine1, 4096), 0);
    fthYield(100);
    for (int i=0; i<100; i++) {
        fthResume(fthSpawn(&threadRoutine2, 4096), i);
    }
    fthYield(1000);
    fthUnlock(wait);

}

Пример #3

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Файл: testhomedir.c Проект: carriercomm/zetascale

void testget()
{
    uint64_t cguid = 1;
    SDF_container_type_t ctype = SDF_BLOCK_CONTAINER;

    for (int blockNum = 0; blockNum < numBlocks*2; blockNum++) {
        local_key_t *lkey = get_local_block_key(blockNum);
        DirEntry *entry = HomeDir_get(homedir, cguid, ctype, lkey);
        // {{
        if (blockNum < numBlocks) {
            plat_assert_always(entry);
            fthWaitEl_t *wait = reqq_lock(entry->q); // LOCK REQQ
            fthThread_t *top = reqq_peek(entry->q);
            plat_assert_always(top == fthSelf());
            fthThread_t *self = reqq_dequeue(entry->q);
            plat_assert_always(self == fthSelf());
            reqq_unlock(entry->q, wait); // UNLOCK REQQ
            if (NULL != (top = reqq_peek(entry->q))) {
                fthResume(top, 0);
                printf("Thread 1: yielding after setting thread 2 to run for block=%u\n", blockNum);
                fthYield(1);
            }
        }
        // }}
        free_local_key(lkey);
    }
    printf("Thread 1: Got %d blocks from the directory\n", numBlocks);
}

Пример #4

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Файл: queue_order_test_fth.c Проект: AlfredChenxf/zetascale

void * OrderTestFthPthreadRoutine(void *arg) {
    fthThread_t *sched;

    plat_log_msg(PLAT_LOG_ID_INITIAL, LOG_CAT, PLAT_LOG_LEVEL_TRACE,
            "\nNode %d FTH threads firing up\n", myid);

    sched = fthInit(); // Init a scheduler

    plat_log_msg(PLAT_LOG_ID_INITIAL, LOG_CAT, PLAT_LOG_LEVEL_TRACE,
            "\nNode %d FTH scheduler has initialized\n", myid);

    // Start a thread
    fthResume(fthSpawn(&fthThreadReceiver1, 16384), 1);
    fthResume(fthSpawn(&fthThreadReceiver2, 16384), 2); // Start a thread
    fthResume(fthSpawn(&sdf_msg_resp_gc, 16384), (uint64_t)myid); // Start response collector
    usleep(500);
    fthResume(fthSpawn(&fthThreadSender, 16384), 0);

    fthStartScheduler(sched);
    fthYield(1); // let them run

    plat_log_msg(PLAT_LOG_ID_INITIAL, LOG_CAT, PLAT_LOG_LEVEL_TRACE,
            "\nFTH scheduler halted\n");
    return (0);

}

Пример #5

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