Method append

rocclr/platform/commandqueue.cpp:317–352

}

void HostQueue::append(Command& command) {
  // We retain the command here. It will be released when its status
  // changes to CL_COMPLETE
  if ((command.getWaitBits() & 0x1) != 0) {
    finish();
  }
  command.retain();
  command.setStatus(CL_QUEUED);
  queue_.enqueue(&command);
  if (!IS_HIP) {
    return;
  }

  // Set last submitted command
  Command* prevLastEnqueueCommand = nullptr;

  // Attach only real commands and skip internal notifications for CPU queue
  if (command.waitingEvent() == nullptr) {
    command.retain();

    // lastCmdLock_ ensures that lastEnqueueCommand() can retain the command before it is swapped
    // out. We want to keep this critical section as short as possible, so the command should be
    // released outside this section.
    ScopedLock l(lastCmdLock_);

    prevLastEnqueueCommand = lastEnqueueCommand_;
    lastEnqueueCommand_ = &command;
  }

  if (prevLastEnqueueCommand != nullptr) {
    prevLastEnqueueCommand->release();
  } else {
    // The queue becomes active. Add it to the set of activeQueues.
    device_.addToActiveQueues(this);
  }
}

bool HostQueue::isEmpty() {
  // Get a snapshot of queue size