queuing_mutex.h Source File

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# queuing_mutex.h

    00001 /*
    00002     Copyright 2005-2012 Intel Corporation.  All Rights Reserved.
    00003
    00004     The source code contained or described herein and all documents related
    00005     to the source code ("Material") are owned by Intel Corporation or its
    00006     suppliers or licensors.  Title to the Material remains with Intel
    00007     Corporation or its suppliers and licensors.  The Material is protected
    00008     by worldwide copyright laws and treaty provisions.  No part of the
    00009     Material may be used, copied, reproduced, modified, published, uploaded,
    00010     posted, transmitted, distributed, or disclosed in any way without
    00011     Intel's prior express written permission.
    00012
    00013     No license under any patent, copyright, trade secret or other
    00014     intellectual property right is granted to or conferred upon you by
    00015     disclosure or delivery of the Materials, either expressly, by
    00016     implication, inducement, estoppel or otherwise.  Any license under such
    00017     intellectual property rights must be express and approved by Intel in
    00018     writing.
    00019 */
    00020
    00021 #ifndef __TBB_queuing_mutex_H
    00022 #define __TBB_queuing_mutex_H
    00023
    00024 #include "tbb_config.h"
    00025
    00026 #if !TBB_USE_EXCEPTIONS && _MSC_VER
    00027     // Suppress "C++ exception handler used, but unwind semantics are not enabled" warning in STL headers
    00028     #pragma warning (push)
    00029     #pragma warning (disable: 4530)
    00030 #endif
    00031
    00032 #include <cstring>
    00033
    00034 #if !TBB_USE_EXCEPTIONS && _MSC_VER
    00035     #pragma warning (pop)
    00036 #endif
    00037
    00038 #include "atomic.h"
    00039 #include "tbb_profiling.h"
    00040
    00041 namespace tbb {
    00042
    00044
    00045 class queuing_mutex {
    00046 public:
    00048     queuing_mutex() {
    00049         q_tail = NULL;
    00050 #if TBB_USE_THREADING_TOOLS
    00051         internal_construct();
    00052 #endif
    00053     }
    00054
    00056
    00058     class scoped_lock: internal::no_copy {
    00060         void initialize() {
    00061             mutex = NULL;
    00062 #if TBB_USE_ASSERT
    00063             internal::poison_pointer(next);
    00064 #endif /* TBB_USE_ASSERT */
    00065         }
    00066
    00067     public:
    00069
    00070         scoped_lock() {initialize();}
    00071
    00073         scoped_lock( queuing_mutex& m ) {
    00074             initialize();
    00075             acquire(m);
    00076         }
    00077
    00079         ~scoped_lock() {
    00080             if( mutex ) release();
    00081         }
    00082
    00084         void __TBB_EXPORTED_METHOD acquire( queuing_mutex& m );
    00085
    00087         bool __TBB_EXPORTED_METHOD try_acquire( queuing_mutex& m );
    00088
    00090         void __TBB_EXPORTED_METHOD release();
    00091
    00092     private:
    00094         queuing_mutex* mutex;
    00095
    00097         scoped_lock *next;
    00098
    00100
    00103         uintptr_t going;
    00104     };
    00105
    00106     void __TBB_EXPORTED_METHOD internal_construct();
    00107
    00108     // Mutex traits
    00109     static const bool is_rw_mutex = false;
    00110     static const bool is_recursive_mutex = false;
    00111     static const bool is_fair_mutex = true;
    00112
    00113 private:
    00115     atomic<scoped_lock*> q_tail;
    00116
    00117 };
    00118
    00119 __TBB_DEFINE_PROFILING_SET_NAME(queuing_mutex)
    00120
    00121 } // namespace tbb
    00122
    00123 #endif /* __TBB_queuing_mutex_H */

Copyright © 2005-2012 Intel Corporation. All Rights Reserved.

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