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/**
* Copyright (c) 2013-2022 UChicago Argonne, LLC and The HDF Group.
* Copyright (c) 2022-2023 Intel Corporation.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#ifndef MERCURY_THREAD_MUTEX_H
#define MERCURY_THREAD_MUTEX_H
#include "mercury_util_config.h"
#include "mercury_thread_annotation.h"
#ifdef _WIN32
#define _WINSOCKAPI_
#include <windows.h>
/* clang-format off */
# define HG_THREAD_MUTEX_INITIALIZER {NULL}
/* clang-format on */
typedef CRITICAL_SECTION hg_thread_mutex_t;
#else
#include <pthread.h>
#define HG_THREAD_MUTEX_INITIALIZER PTHREAD_MUTEX_INITIALIZER
typedef pthread_mutex_t HG_LOCK_CAPABILITY("mutex") 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);
/**
* Initialize the mutex, asking for "fast" 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_fast(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
*/
static HG_UTIL_INLINE void hg_thread_mutex_lock(hg_thread_mutex_t *mutex) HG_LOCK_ACQUIRE(*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)
HG_LOCK_TRY_ACQUIRE(HG_UTIL_SUCCESS, *mutex);
/**
* Unlock the mutex.
*
* \param mutex [IN/OUT] pointer to mutex object
*/
static HG_UTIL_INLINE void hg_thread_mutex_unlock(hg_thread_mutex_t *mutex) HG_LOCK_RELEASE(*mutex);
/*---------------------------------------------------------------------------*/
static HG_UTIL_INLINE void
hg_thread_mutex_lock(hg_thread_mutex_t *mutex) HG_LOCK_NO_THREAD_SAFETY_ANALYSIS
{
#ifdef _WIN32
EnterCriticalSection(mutex);
#else
(void)pthread_mutex_lock(mutex);
#endif
}
/*---------------------------------------------------------------------------*/
static HG_UTIL_INLINE int
hg_thread_mutex_try_lock(hg_thread_mutex_t *mutex) HG_LOCK_NO_THREAD_SAFETY_ANALYSIS
{
#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 void
hg_thread_mutex_unlock(hg_thread_mutex_t *mutex) HG_LOCK_NO_THREAD_SAFETY_ANALYSIS
{
#ifdef _WIN32
LeaveCriticalSection(mutex);
#else
(void)pthread_mutex_unlock(mutex);
#endif
}
#ifdef __cplusplus
}
#endif
#endif /* MERCURY_THREAD_MUTEX_H */
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