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/* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil -*- */
/*
* Copyright (c) 2004-2005 The Trustees of Indiana University and Indiana
* University Research and Technology
* Corporation. All rights reserved.
* Copyright (c) 2004-2006 The University of Tennessee and The University
* of Tennessee Research Foundation. All rights
* reserved.
* Copyright (c) 2004-2005 High Performance Computing Center Stuttgart,
* University of Stuttgart. All rights reserved.
* Copyright (c) 2004-2005 The Regents of the University of California.
* All rights reserved.
* Copyright (c) 2007-2015 Los Alamos National Security, LLC. All rights
* reserved.
* Copyright (c) 2015-2016 Research Organization for Information Science
* and Technology (RIST). All rights reserved.
* $COPYRIGHT$
*
* Additional copyrights may follow
*
* $HEADER$
*/
#ifndef OPAL_MUTEX_UNIX_H
#define OPAL_MUTEX_UNIX_H 1
/**
* @file:
*
* Mutual exclusion functions: Unix implementation.
*
* Functions for locking of critical sections.
*
* On unix, use pthreads or our own atomic operations as
* available.
*/
#include "opal_config.h"
#include <pthread.h>
#include <errno.h>
#include <stdio.h>
#include "opal/class/opal_object.h"
#include "opal/sys/atomic.h"
BEGIN_C_DECLS
struct opal_mutex_t {
opal_object_t super;
pthread_mutex_t m_lock_pthread;
#if OPAL_ENABLE_DEBUG
int m_lock_debug;
const char *m_lock_file;
int m_lock_line;
#endif
opal_atomic_lock_t m_lock_atomic;
};
OPAL_DECLSPEC OBJ_CLASS_DECLARATION(opal_mutex_t);
OPAL_DECLSPEC OBJ_CLASS_DECLARATION(opal_recursive_mutex_t);
#if defined(PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP)
#define OPAL_PTHREAD_RECURSIVE_MUTEX_INITIALIZER PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP
#elif defined(PTHREAD_RECURSIVE_MUTEX_INITIALIZER)
#define OPAL_PTHREAD_RECURSIVE_MUTEX_INITIALIZER PTHREAD_RECURSIVE_MUTEX_INITIALIZER
#endif
#if OPAL_ENABLE_DEBUG
#define OPAL_MUTEX_STATIC_INIT \
{ \
.super = OPAL_OBJ_STATIC_INIT(opal_mutex_t), \
.m_lock_pthread = PTHREAD_MUTEX_INITIALIZER, \
.m_lock_debug = 0, \
.m_lock_file = NULL, \
.m_lock_line = 0, \
.m_lock_atomic = { .u = { .lock = OPAL_ATOMIC_LOCK_UNLOCKED } }, \
}
#else
#define OPAL_MUTEX_STATIC_INIT \
{ \
.super = OPAL_OBJ_STATIC_INIT(opal_mutex_t), \
.m_lock_pthread = PTHREAD_MUTEX_INITIALIZER, \
.m_lock_atomic = { .u = { .lock = OPAL_ATOMIC_LOCK_UNLOCKED } }, \
}
#endif
#if defined(OPAL_PTHREAD_RECURSIVE_MUTEX_INITIALIZER)
#if OPAL_ENABLE_DEBUG
#define OPAL_RECURSIVE_MUTEX_STATIC_INIT \
{ \
.super = OPAL_OBJ_STATIC_INIT(opal_mutex_t), \
.m_lock_pthread = OPAL_PTHREAD_RECURSIVE_MUTEX_INITIALIZER, \
.m_lock_debug = 0, \
.m_lock_file = NULL, \
.m_lock_line = 0, \
.m_lock_atomic = { .u = { .lock = OPAL_ATOMIC_LOCK_UNLOCKED } }, \
}
#else
#define OPAL_RECURSIVE_MUTEX_STATIC_INIT \
{ \
.super = OPAL_OBJ_STATIC_INIT(opal_mutex_t), \
.m_lock_pthread = OPAL_PTHREAD_RECURSIVE_MUTEX_INITIALIZER, \
.m_lock_atomic = { .u = { .lock = OPAL_ATOMIC_LOCK_UNLOCKED } }, \
}
#endif
#endif
/************************************************************************
*
* mutex operations (non-atomic versions)
*
************************************************************************/
static inline int opal_mutex_trylock(opal_mutex_t *m)
{
#if OPAL_ENABLE_DEBUG
int ret = pthread_mutex_trylock(&m->m_lock_pthread);
if (ret == EDEADLK) {
errno = ret;
perror("opal_mutex_trylock()");
abort();
}
return ret;
#else
return pthread_mutex_trylock(&m->m_lock_pthread);
#endif
}
static inline void opal_mutex_lock(opal_mutex_t *m)
{
#if OPAL_ENABLE_DEBUG
int ret = pthread_mutex_lock(&m->m_lock_pthread);
if (ret == EDEADLK) {
errno = ret;
perror("opal_mutex_lock()");
abort();
}
#else
pthread_mutex_lock(&m->m_lock_pthread);
#endif
}
static inline void opal_mutex_unlock(opal_mutex_t *m)
{
#if OPAL_ENABLE_DEBUG
int ret = pthread_mutex_unlock(&m->m_lock_pthread);
if (ret == EPERM) {
errno = ret;
perror("opal_mutex_unlock");
abort();
}
#else
pthread_mutex_unlock(&m->m_lock_pthread);
#endif
}
/************************************************************************
*
* mutex operations (atomic versions)
*
************************************************************************/
#if OPAL_HAVE_ATOMIC_SPINLOCKS
/************************************************************************
* Spin Locks
************************************************************************/
static inline int opal_mutex_atomic_trylock(opal_mutex_t *m)
{
return opal_atomic_trylock(&m->m_lock_atomic);
}
static inline void opal_mutex_atomic_lock(opal_mutex_t *m)
{
opal_atomic_lock(&m->m_lock_atomic);
}
static inline void opal_mutex_atomic_unlock(opal_mutex_t *m)
{
opal_atomic_unlock(&m->m_lock_atomic);
}
#else
/************************************************************************
* Standard locking
************************************************************************/
static inline int opal_mutex_atomic_trylock(opal_mutex_t *m)
{
return opal_mutex_trylock(m);
}
static inline void opal_mutex_atomic_lock(opal_mutex_t *m)
{
opal_mutex_lock(m);
}
static inline void opal_mutex_atomic_unlock(opal_mutex_t *m)
{
opal_mutex_unlock(m);
}
#endif
END_C_DECLS
#endif /* OPAL_MUTEX_UNIX_H */
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