#ifndef __SynchronizedLog_ah__
#define __SynchronizedLog_ah__

#include <pthread.h>

aspect SynchronizedLog {
  // introduce a mutex into the Log class
  // -> there is one mutex instance per log object
  advice "Log": slice struct {
    pthread_mutex_t _mutex;
  };

  // initialize the mutex upon Log construction
  advice construction("Log") : before () {
    pthread_mutex_t helper = PTHREAD_MUTEX_INITIALIZER;
    tjp->that ()->_mutex = helper;
  }

  // protect the critical section
  advice execution("% Log::print(...)") : around () {
    pthread_mutex_lock(&tjp->that ()->_mutex);
    tjp->proceed ();
    pthread_mutex_unlock(&tjp->that ()->_mutex);
  }
};

#endif // __SynchronizedLog_ah__