87 lines
2.9 KiB
C++
87 lines
2.9 KiB
C++
/* lock_guard.h -*-C++-*-
|
|
*
|
|
*************************************************************************
|
|
*
|
|
* @copyright
|
|
* Copyright (C) 2011-2013, 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.
|
|
*
|
|
**************************************************************************
|
|
*
|
|
* Lock guard patterned after the std::lock_guard class template proposed in
|
|
* the C++ 0x draft standard.
|
|
*
|
|
* An object of type lock_guard controls the ownership of a mutex object
|
|
* within a scope. A lock_guard object maintains ownership of a mutex object
|
|
* throughout the lock_guard object's lifetime. The behavior of a program is
|
|
* undefined if the mutex referenced by pm does not exist for the entire
|
|
* lifetime of the lock_guard object.
|
|
*/
|
|
|
|
#ifndef LOCK_GUARD_H_INCLUDED
|
|
#define LOCK_GUARD_H_INCLUDED
|
|
|
|
#include <cilk/cilk.h>
|
|
|
|
namespace cilkscreen
|
|
{
|
|
template <class Mutex>
|
|
class lock_guard
|
|
{
|
|
public:
|
|
typedef Mutex mutex_type;
|
|
|
|
explicit lock_guard(mutex_type &m) : pm(m)
|
|
{
|
|
pm.lock();
|
|
locked = true;
|
|
}
|
|
|
|
~lock_guard()
|
|
{
|
|
locked = false;
|
|
pm.unlock();
|
|
}
|
|
|
|
private:
|
|
lock_guard(lock_guard const&);
|
|
lock_guard& operator=(lock_guard const&);
|
|
|
|
private:
|
|
// exposition only:
|
|
mutex_type ±
|
|
bool locked;
|
|
};
|
|
}
|
|
|
|
#endif // LOCK_GUARD_H_INCLUDED
|