text: /*
   * Copyright 2021 SkyAPM
   *
   * 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.
   *
   */
  
  
  #ifndef SKYWALKING_SKY_SHM_H
  #define SKYWALKING_SKY_SHM_H
  
  #include "string"
  
  #define ACCESS_BIT 0666
  #define SEM_EXIST (-2)
  
  #if !defined(__APPLE__) && !defined(__MACH__)
  union semun {
      int val;
      struct semid_ds *buf;
      unsigned short *array;
  };
  #endif
  
  int sky_sem_new();
  
  int sky_sem_get();
  
  int sky_sem_p(int sem_id);
  
  int sky_sem_v(int sem_id);
  
  int sky_sem_del(int sem_id);
  
  
  #endif //SKYWALKING_SKY_SHM_H
  