| /* 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 |