mirror of
https://github.com/autc04/Retro68.git
synced 2024-11-23 15:32:26 +00:00
132 lines
4.2 KiB
C++
132 lines
4.2 KiB
C++
/* worker_mutex.h -*-C++-*-
|
|
*
|
|
*************************************************************************
|
|
*
|
|
* @copyright
|
|
* Copyright (C) 2009-2013, Intel Corporation
|
|
* All rights reserved.
|
|
*
|
|
* @copyright
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
*
|
|
* * Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* * Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in
|
|
* the documentation and/or other materials provided with the
|
|
* distribution.
|
|
* * Neither the name of Intel Corporation nor the names of its
|
|
* contributors may be used to endorse or promote products derived
|
|
* from this software without specific prior written permission.
|
|
*
|
|
* @copyright
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
|
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
|
|
* HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
|
|
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
|
|
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
|
|
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
|
|
* WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
* POSSIBILITY OF SUCH DAMAGE.
|
|
**************************************************************************/
|
|
|
|
/**
|
|
* @file worker_mutex.h
|
|
*
|
|
* @brief Support for Cilk runtime mutexes.
|
|
*
|
|
* Cilk runtime mutexes are implemented as simple spin loops.
|
|
*/
|
|
|
|
#ifndef INCLUDED_WORKER_MUTEX_DOT_H
|
|
#define INCLUDED_WORKER_MUTEX_DOT_H
|
|
|
|
#include <cilk/common.h>
|
|
#include "rts-common.h"
|
|
|
|
__CILKRTS_BEGIN_EXTERN_C
|
|
|
|
/**
|
|
* Mutexes are treated as an abstract data type within the Cilk
|
|
* runtime system. They are implemented as simple spin loops and
|
|
* owned by a __cilkrts_worker.
|
|
*/
|
|
typedef struct mutex {
|
|
/** Mutex spin loop variable. 0 if unowned, 1 if owned. */
|
|
volatile int lock;
|
|
|
|
/** Worker that owns the mutex. Must be 0 if mutex is unowned. */
|
|
__cilkrts_worker *owner;
|
|
} mutex;
|
|
|
|
/**
|
|
* @brief Initialize a Cilk mutex.
|
|
*
|
|
* @param m Mutex to be initialized.
|
|
*/
|
|
COMMON_PORTABLE
|
|
void __cilkrts_mutex_init(struct mutex *m);
|
|
|
|
/**
|
|
* @brief Acquire a Cilk mutex.
|
|
*
|
|
* If statistics are being gathered, the time spent
|
|
* acquiring the mutex will be attributed to the specified worker.
|
|
*
|
|
* @param w Worker that will become the owner of this mutex.
|
|
* @param m Mutex to be initialized.
|
|
*/
|
|
COMMON_PORTABLE
|
|
void __cilkrts_mutex_lock(__cilkrts_worker *w,
|
|
struct mutex *m);
|
|
/**
|
|
* @brief Attempt to lock a Cilk mutex and fail if it isn't available.
|
|
*
|
|
* If statistics are being gathered, the time spent acquiring the
|
|
* mutex will be attributed to the specified worker.
|
|
*
|
|
* @param w Worker that will become the owner of this mutex.
|
|
* @param m Mutex to be acquired.
|
|
*
|
|
* @return 1 if the mutex was acquired.
|
|
* @return 0 if the mutex was not acquired.
|
|
*/
|
|
COMMON_PORTABLE
|
|
int __cilkrts_mutex_trylock(__cilkrts_worker *w,
|
|
struct mutex *m);
|
|
|
|
/**
|
|
* @brief Release a Cilk mutex.
|
|
*
|
|
* If statistics are being gathered, the time spent
|
|
* acquiring the mutex will be attributed to the specified worker.
|
|
*
|
|
* @pre The mutex must be owned by the worker.
|
|
*
|
|
* @param w Worker that owns this mutex.
|
|
* @param m Mutex to be released.
|
|
*/
|
|
COMMON_PORTABLE
|
|
void __cilkrts_mutex_unlock(__cilkrts_worker *w,
|
|
struct mutex *m);
|
|
|
|
/**
|
|
* @brief Deallocate a Cilk mutex. Currently does nothing.
|
|
*
|
|
* @param w Unused.
|
|
* @param m Mutex to be deallocated.
|
|
*/
|
|
COMMON_PORTABLE
|
|
void __cilkrts_mutex_destroy(__cilkrts_worker *w,
|
|
struct mutex *m);
|
|
|
|
__CILKRTS_END_EXTERN_C
|
|
|
|
#endif // ! defined(INCLUDED_WORKER_MUTEX_DOT_H)
|