SemaphoreLocker.h

/**************************************************************************
 * basf2 (Belle II Analysis Software Framework)                           *
 * Author: The Belle II Collaboration                                     *
 *                                                                        *
 * See git log for contributors and copyright holders.                    *
 * This file is licensed under LGPL-3.0, see LICENSE.md.                  *
 **************************************************************************/
#pragma once
 
#include <sys/types.h>
 
namespace Belle2 {
  class SemaphoreLocker {
  public:
    explicit SemaphoreLocker(int semId): m_id(semId) { lock(); }
    ~SemaphoreLocker() { unlock(); }
 
    static int create(key_t semkey);
    static void destroy(int semId);
 
    static bool isLocked(int semId);
 
    void lock();
    void unlock();
 
  private:
    int m_id; 
  };
}