null_rw_mutex.h Source File

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# null_rw_mutex.h

    00001 /*
    00002     Copyright 2005-2010 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_null_rw_mutex_H
    00022 #define __TBB_null_rw_mutex_H
    00023
    00024 namespace tbb {
    00025
    00027
    00029 class null_rw_mutex {
    00031     null_rw_mutex( const null_rw_mutex& );
    00032     void operator=( const null_rw_mutex& );
    00033 public:
    00035     class scoped_lock {
    00036     public:
    00037         scoped_lock() {}
    00038         scoped_lock( null_rw_mutex& , bool = true ) {}
    00039         ~scoped_lock() {}
    00040         void acquire( null_rw_mutex& , bool = true ) {}
    00041         bool upgrade_to_writer() { return true; }
    00042         bool downgrade_to_reader() { return true; }
    00043         bool try_acquire( null_rw_mutex& , bool = true ) { return true; }
    00044         void release() {}
    00045     };
    00046
    00047     null_rw_mutex() {}
    00048
    00049     // Mutex traits
    00050     static const bool is_rw_mutex = true;
    00051     static const bool is_recursive_mutex = true;
    00052     static const bool is_fair_mutex = true;
    00053 };
    00054
    00055 }
    00056
    00057 #endif /* __TBB_null_rw_mutex_H */

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