C++ (Cpp) TaskQueue::takeFirst Examples

Example #1

File: IDBTransactionBackendImpl.cpp Project: fatman2021/webkitgtk

void IDBTransactionBackendImpl::taskTimerFired(Timer<IDBTransactionBackendImpl>*)
{
    IDB_TRACE("IDBTransactionBackendImpl::taskTimerFired");
    ASSERT(!isTaskQueueEmpty());

    if (m_state == StartPending) {
        m_transaction.begin();
        m_state = Running;
    }

    // The last reference to this object may be released while performing the
    // tasks. Take take a self reference to keep this object alive so that
    // the loop termination conditions can be checked.
    RefPtr<IDBTransactionBackendImpl> protect(this);

    TaskQueue* taskQueue = m_pendingPreemptiveEvents ? &m_preemptiveTaskQueue : &m_taskQueue;
    while (!taskQueue->isEmpty() && m_state != Finished) {
        ASSERT(m_state == Running);
        OwnPtr<Operation> task(taskQueue->takeFirst());
        task->perform(this);

        // Event itself may change which queue should be processed next.
        taskQueue = m_pendingPreemptiveEvents ? &m_preemptiveTaskQueue : &m_taskQueue;
    }

    // If there are no pending tasks, we haven't already committed/aborted,
    // and the front-end requested a commit, it is now safe to do so.
    if (!hasPendingTasks() && m_state != Finished && m_commitPending)
        commit();
}

Example #2

void IDBTransactionBackendImpl::taskTimerFired(Timer<IDBTransactionBackendImpl>*)
{
    IDB_TRACE("IDBTransactionBackendImpl::taskTimerFired");
    ASSERT(!isTaskQueueEmpty());

    if (m_state == StartPending) {
        m_transaction->begin();
        m_state = Running;
    }

    TaskQueue* taskQueue = m_pendingPreemptiveEvents ? &m_preemptiveTaskQueue : &m_taskQueue;
    while (!taskQueue->isEmpty() && m_state != Finished) {
        ASSERT(m_state == Running);
        OwnPtr<ScriptExecutionContext::Task> task(taskQueue->takeFirst());
        m_pendingEvents++;
        task->performTask(0);

        // Event itself may change which queue should be processed next.
        taskQueue = m_pendingPreemptiveEvents ? &m_preemptiveTaskQueue : &m_taskQueue;
    }
}