C++ (Cpp) add_select_sync_pool_entry 예제들

예제 #1

파일: fifo.cpp 프로젝트: mylegacy/haiku

status_t
Inode::Select(uint8 event, selectsync* sync, int openMode)
{
	bool writer = true;
	select_sync_pool** pool;
	if ((openMode & O_RWMASK) == O_RDONLY) {
		pool = &fReadSelectSyncPool;
		writer = false;
	} else if ((openMode & O_RWMASK) == O_WRONLY) {
		pool = &fWriteSelectSyncPool;
	} else
		return B_NOT_ALLOWED;

	if (add_select_sync_pool_entry(pool, sync, event) != B_OK)
		return B_ERROR;

	// signal right away, if the condition holds already
	if (writer) {
		if ((event == B_SELECT_WRITE
				&& (fBuffer.Writable() > 0 || fReaderCount == 0))
			|| (event == B_SELECT_ERROR && fReaderCount == 0)) {
			return notify_select_event(sync, event);
		}
	} else {
		if (event == B_SELECT_READ
				&& (fBuffer.Readable() > 0 || fWriterCount == 0)) {
			return notify_select_event(sync, event);
		}
	}

	return B_OK;
}

예제 #2

파일: net_socket.cpp 프로젝트: mmadia/Haiku-services-branch

status_t
socket_request_notification(net_socket* _socket, uint8 event, selectsync* sync)
{
	net_socket_private* socket = (net_socket_private*)_socket;

	mutex_lock(&socket->lock);

	status_t status = add_select_sync_pool_entry(&socket->select_pool, sync,
		event);

	mutex_unlock(&socket->lock);

	if (status != B_OK)
		return status;

	// check if the event is already present
	// TODO: add support for poll() types

	switch (event) {
		case B_SELECT_READ:
		{
			ssize_t available = socket_read_avail(socket);
			if ((ssize_t)socket->receive.low_water_mark <= available
				|| available < B_OK)
				notify_select_event(sync, event);
			break;
		}
		case B_SELECT_WRITE:
		{
			ssize_t available = socket_send_avail(socket);
			if ((ssize_t)socket->send.low_water_mark <= available
				|| available < B_OK)
				notify_select_event(sync, event);
			break;
		}
		case B_SELECT_ERROR:
			// TODO: B_SELECT_ERROR condition!
			break;
	}

	return B_OK;
}