#include "mutex.h"

#ifndef WIN32
 static pthread_mutexattr_t  *sMutexAttr=NULL;
 static void MutexAttrInit();
 static pthread_once_t sMutexAttrInit = PTHREAD_ONCE_INIT;
#endif

MMutex::MMutex()
{
#ifdef WIN32
    ::InitializeCriticalSection(&fMutex);
#else
    (void)pthread_once(&sMutexAttrInit, MutexAttrInit);
    (void)pthread_mutex_init(&fMutex, sMutexAttr);
#endif
}

#ifndef WIN32
void MutexAttrInit()
{
    sMutexAttr = (pthread_mutexattr_t*)malloc(sizeof(pthread_mutexattr_t));
    ::memset(sMutexAttr, 0, sizeof(pthread_mutexattr_t));
    pthread_mutexattr_init(sMutexAttr);
}
#endif

MMutex::~MMutex()
{
#ifdef WIN32
    ::DeleteCriticalSection(&fMutex);
#else
    pthread_mutex_destroy(&fMutex);
#endif
}