2 This source code file is part of thread_mpi.
3 Written by Sander Pronk, Erik Lindahl, and possibly others.
5 Copyright (c) 2009, Sander Pronk, Erik Lindahl.
8 Redistribution and use in source and binary forms, with or without
9 modification, are permitted provided that the following conditions are met:
10 1) Redistributions of source code must retain the above copyright
11 notice, this list of conditions and the following disclaimer.
12 2) Redistributions in binary form must reproduce the above copyright
13 notice, this list of conditions and the following disclaimer in the
14 documentation and/or other materials provided with the distribution.
15 3) Neither the name of the copyright holders nor the
16 names of its contributors may be used to endorse or promote products
17 derived from this software without specific prior written permission.
19 THIS SOFTWARE IS PROVIDED BY US ''AS IS'' AND ANY
20 EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
21 WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
22 DISCLAIMED. IN NO EVENT SHALL WE BE LIABLE FOR ANY
23 DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
24 (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
25 LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
26 ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
28 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 If you want to redistribute modifications, please consider that
31 scientific software is very special. Version control is crucial -
32 bugs must be traceable. We will be happy to consider code for
33 inclusion in the official distribution, but derived work should not
34 be called official thread_mpi. Details are found in the README & COPYING
40 * \brief mutex objects with C++11 API compatibility.
42 * This header contains classes mutex and lock_guard, used in C++ mutex
43 * implementations safe for exceptions.
49 #include "visibility.h"
50 #include "system_error.h"
58 /*! \brief A lock guard class that allows for the simple management of
59 mutexes. C++11 compatible.
61 In C++, mutexes would normally have to be unlocked with explicit
62 exception handlers and unlock statements. This class automates that
63 by handling the mutex unlock in a destructor. The constructor locks
70 tMPI::lock_guard<tMPI::mutex> lock(mtx);
74 template <class Mutex> class TMPI_EXPORT lock_guard
77 //! Lockable type that this lock operates on.
78 typedef Mutex mutex_type;
79 /*! \brief The constructor, which locks the mutex.
81 \param m The exisiting (globally accessible) mutex to lock. */
82 explicit lock_guard(mutex_type &m) : m_(m)
86 //lock_guard(mutex_type &m, adopt_lock_t t);
88 /*! \brief The destructor, which unlocks the mutex */
94 // forbid copy constructor & assignment
95 lock_guard(const lock_guard &l);
96 lock_guard &operator=(const lock_guard &l);
101 /*! \brief A basic mutex class with C++11 compatibility. */
102 class TMPI_EXPORT mutex
105 //! Type of the native mutex handle.
106 typedef tMPI_Thread_mutex_t* native_handle_type;
108 /*! \brief The constructor.
110 Throws a tMPI::system_error exception upon failure. */
113 int ret = tMPI_Thread_mutex_init(&handle_);
116 throw system_error(ret);
120 /*! \brief The destructor.*/
123 tMPI_Thread_mutex_destroy(&handle_);
126 /*! \brief The lock function.
128 Throws a tMPI::system_error exception upon failure. */
131 int ret = tMPI_Thread_mutex_lock(&handle_);
134 throw system_error(ret);
138 /*! \brief The try_lock function.
140 Throws a tMPI::system_error exception upon failure.
141 \return true if the lock was locked successfully, false if not*/
144 if (tMPI_Thread_mutex_trylock(&handle_))
151 /*! \brief The unlock function.
153 Throws a tMPI::system_error exception upon failure. */
156 int ret = tMPI_Thread_mutex_unlock(&handle_);
159 throw system_error(ret);
163 //! Returns the native handle for this mutex.
164 native_handle_type native_handle() { return &handle_; }
166 // forbid copy constructor & assignment
167 mutex(const mutex &m);
168 mutex &operator=(const mutex &m);
170 tMPI_Thread_mutex_t handle_;
174 #endif /* __cplusplus */
176 #endif /* TMPI_MUTEX_H_ */