host/libs/msg_queue/msg_queue.h

/*
 * Copyright (C) 2020 The Android Open Source Project
 *
 * 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.
 */
#pragma once

#include <string>

namespace cuttlefish {
class SysVMessageQueue {
 public:
  static std::unique_ptr<SysVMessageQueue> Create(const std::string& path,
                                                  char proj_id);
  ~SysVMessageQueue();

  int Send(void* data, size_t size, bool block);
  ssize_t Receive(void* data, size_t size, long msgtyp, bool block);

 private:
  SysVMessageQueue(int msgid);
  int msgid;
};
}  // namespace cuttlefish