93 lines
2.9 KiB
C++
93 lines
2.9 KiB
C++
/* fake_mutex.h -*-C++-*-
|
|
*
|
|
*************************************************************************
|
|
*
|
|
* @copyright
|
|
* Copyright (C) 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.
|
|
*
|
|
**************************************************************************
|
|
*
|
|
* Cilkscreen fake mutexes are provided to indicate to the Cilkscreen race
|
|
* detector that a race should be ignored.
|
|
*
|
|
* NOTE: This class does not provide mutual exclusion. You should use the
|
|
* mutual exclusion constructs provided by TBB or your operating system to
|
|
* protect against real data races.
|
|
*/
|
|
|
|
#ifndef FAKE_MUTEX_H_INCLUDED
|
|
#define FAKE_MUTEX_H_INCLUDED
|
|
|
|
#include <cilktools/cilkscreen.h>
|
|
|
|
namespace cilkscreen
|
|
{
|
|
class fake_mutex
|
|
{
|
|
public:
|
|
fake_mutex() : locked(false)
|
|
{
|
|
}
|
|
|
|
~fake_mutex()
|
|
{
|
|
__CILKRTS_ASSERT(! locked);
|
|
}
|
|
|
|
// Wait until mutex is available, then enter
|
|
void lock()
|
|
{
|
|
__cilkscreen_acquire_lock(&locked);
|
|
__CILKRTS_ASSERT(! locked);
|
|
locked = true;
|
|
}
|
|
|
|
// A fake mutex is always available
|
|
bool try_lock() { lock(); return true; }
|
|
|
|
// Releases the mutex
|
|
void unlock()
|
|
{
|
|
__CILKRTS_ASSERT(locked);
|
|
locked = false;
|
|
__cilkscreen_release_lock(&locked);
|
|
}
|
|
|
|
private:
|
|
bool locked;
|
|
};
|
|
|
|
} // namespace cilk
|
|
|
|
#endif // FAKE_MUTEX_H_INCLUDED
|