faux-folly/folly/futures/QueuedImmediateExecutor.cpp

/*
 * Copyright 2015 Facebook, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include <folly/futures/QueuedImmediateExecutor.h>
#include <folly/ThreadLocal.h>
#include <queue>

namespace folly {

void QueuedImmediateExecutor::addStatic(Func callback) {
  static folly::ThreadLocal<std::queue<Func>> q_;

  if (q_->empty()) {
    q_->push(std::move(callback));
    while (!q_->empty()) {
      q_->front()();
      q_->pop();
    }
  } else {
    q_->push(callback);
  }
}

} // namespace