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/*
* 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) 2010 Cisco Systems, Inc. All rights reserved.
* Copyright (c) 2010 Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2015-2017 Research Organization for Information Science
* and Technology (RIST). All rights reserved.
* Copyright (c) 2017 Intel, Inc. All rights reserved.
* $COPYRIGHT$
*
* Additional copyrights may follow
*
* $HEADER$
*/
#ifndef OPAL_THREAD_H
#define OPAL_THREAD_H 1
#include "opal_config.h"
#include <pthread.h>
#include <signal.h>
#include "opal/class/opal_object.h"
#if OPAL_ENABLE_DEBUG
#include "opal/util/output.h"
#endif
#include "mutex.h"
#include "condition.h"
BEGIN_C_DECLS
typedef void *(*opal_thread_fn_t) (opal_object_t *);
#define OPAL_THREAD_CANCELLED ((void*)1);
struct opal_thread_t {
opal_object_t super;
opal_thread_fn_t t_run;
void* t_arg;
pthread_t t_handle;
};
typedef struct opal_thread_t opal_thread_t;
#if OPAL_ENABLE_DEBUG
OPAL_DECLSPEC extern bool opal_debug_threads;
#endif
OPAL_DECLSPEC OBJ_CLASS_DECLARATION(opal_thread_t);
#if OPAL_ENABLE_DEBUG
#define OPAL_ACQUIRE_THREAD(lck, cnd, act) \
do { \
OPAL_THREAD_LOCK((lck)); \
if (opal_debug_threads) { \
opal_output(0, "Waiting for thread %s:%d", \
__FILE__, __LINE__); \
} \
while (*(act)) { \
opal_condition_wait((cnd), (lck)); \
} \
if (opal_debug_threads) { \
opal_output(0, "Thread obtained %s:%d", \
__FILE__, __LINE__); \
} \
*(act) = true; \
} while(0);
#else
#define OPAL_ACQUIRE_THREAD(lck, cnd, act) \
do { \
OPAL_THREAD_LOCK((lck)); \
while (*(act)) { \
opal_condition_wait((cnd), (lck)); \
} \
*(act) = true; \
} while(0);
#endif
#if OPAL_ENABLE_DEBUG
#define OPAL_RELEASE_THREAD(lck, cnd, act) \
do { \
if (opal_debug_threads) { \
opal_output(0, "Releasing thread %s:%d", \
__FILE__, __LINE__); \
} \
*(act) = false; \
opal_condition_broadcast((cnd)); \
OPAL_THREAD_UNLOCK((lck)); \
} while(0);
#else
#define OPAL_RELEASE_THREAD(lck, cnd, act) \
do { \
*(act) = false; \
opal_condition_broadcast((cnd)); \
OPAL_THREAD_UNLOCK((lck)); \
} while(0);
#endif
#define OPAL_WAKEUP_THREAD(cnd, act) \
do { \
*(act) = false; \
opal_condition_broadcast((cnd)); \
} while(0);
/* provide a macro for forward-proofing the shifting
* of objects between libevent threads - at some point, we
* may revamp that threading model */
/* post an object to another thread - for now, we
* only have a memory barrier */
#define OPAL_POST_OBJECT(o) opal_atomic_wmb()
/* acquire an object from another thread - for now,
* we only have a memory barrier */
#define OPAL_ACQUIRE_OBJECT(o) opal_atomic_rmb()
OPAL_DECLSPEC int opal_thread_start(opal_thread_t *);
OPAL_DECLSPEC int opal_thread_join(opal_thread_t *, void **thread_return);
OPAL_DECLSPEC bool opal_thread_self_compare(opal_thread_t*);
OPAL_DECLSPEC opal_thread_t *opal_thread_get_self(void);
OPAL_DECLSPEC void opal_thread_kill(opal_thread_t *, int sig);
OPAL_DECLSPEC void opal_thread_set_main(void);
END_C_DECLS
#endif /* OPAL_THREAD_H */
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