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/*
* Copyright (C) 2013-2019 Argonne National Laboratory, Department of Energy,
* UChicago Argonne, LLC and The HDF Group.
* All rights reserved.
*
* The full copyright notice, including terms governing use, modification,
* and redistribution, is contained in the COPYING file that can be
* found at the root of the source code distribution tree.
*/
#ifndef MERCURY_THREAD_MUTEX_H
#define MERCURY_THREAD_MUTEX_H
#include "mercury_util_config.h"
#ifdef _WIN32
# include <windows.h>
# define HG_THREAD_MUTEX_INITIALIZER NULL
typedef CRITICAL_SECTION hg_thread_mutex_t;
#else
# include <pthread.h>
# define HG_THREAD_MUTEX_INITIALIZER PTHREAD_MUTEX_INITIALIZER
typedef pthread_mutex_t hg_thread_mutex_t;
#endif
#ifdef __cplusplus
extern "C" {
#endif
/**
* Initialize the mutex.
*
* \param mutex [IN/OUT] pointer to mutex object
*
* \return Non-negative on success or negative on failure
*/
HG_UTIL_PUBLIC int
hg_thread_mutex_init(hg_thread_mutex_t *mutex);
/**
* Destroy the mutex.
*
* \param mutex [IN/OUT] pointer to mutex object
*
* \return Non-negative on success or negative on failure
*/
HG_UTIL_PUBLIC int
hg_thread_mutex_destroy(hg_thread_mutex_t *mutex);
/**
* Lock the mutex.
*
* \param mutex [IN/OUT] pointer to mutex object
*
* \return Non-negative on success or negative on failure
*/
static HG_UTIL_INLINE int
hg_thread_mutex_lock(hg_thread_mutex_t *mutex);
/**
* Try locking the mutex.
*
* \param mutex [IN/OUT] pointer to mutex object
*
* \return Non-negative on success or negative on failure
*/
static HG_UTIL_INLINE int
hg_thread_mutex_try_lock(hg_thread_mutex_t *mutex);
/**
* Unlock the mutex.
*
* \param mutex [IN/OUT] pointer to mutex object
*
* \return Non-negative on success or negative on failure
*/
static HG_UTIL_INLINE int
hg_thread_mutex_unlock(hg_thread_mutex_t *mutex);
/*---------------------------------------------------------------------------*/
static HG_UTIL_INLINE int
hg_thread_mutex_lock(hg_thread_mutex_t *mutex)
{
#ifdef _WIN32
EnterCriticalSection(mutex);
#else
if (pthread_mutex_lock(mutex))
return HG_UTIL_FAIL;
#endif
return HG_UTIL_SUCCESS;
}
/*---------------------------------------------------------------------------*/
static HG_UTIL_INLINE int
hg_thread_mutex_try_lock(hg_thread_mutex_t *mutex)
{
#ifdef _WIN32
if (!TryEnterCriticalSection(mutex))
return HG_UTIL_FAIL;
#else
if (pthread_mutex_trylock(mutex))
return HG_UTIL_FAIL;
#endif
return HG_UTIL_SUCCESS;
}
/*---------------------------------------------------------------------------*/
static HG_UTIL_INLINE int
hg_thread_mutex_unlock(hg_thread_mutex_t *mutex)
{
#ifdef _WIN32
LeaveCriticalSection(mutex);
#else
if (pthread_mutex_unlock(mutex))
return HG_UTIL_FAIL;
#endif
return HG_UTIL_SUCCESS;
}
#ifdef __cplusplus
}
#endif
#endif /* MERCURY_THREAD_MUTEX_H */
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