1 | // Copyright (c) 2013 by István Váradi
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2 |
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3 | // This file is part of libxplcommon, a common utility library for
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4 | // development related to X-Plane
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5 |
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6 | // Redistribution and use in source and binary forms, with or without
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7 | // modification, are permitted provided that the following conditions are met:
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8 |
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9 | // 1. Redistributions of source code must retain the above copyright notice, this
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10 | // list of conditions and the following disclaimer.
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11 | // 2. Redistributions in binary form must reproduce the above copyright notice,
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12 | // this list of conditions and the following disclaimer in the documentation
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13 | // and/or other materials provided with the distribution.
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14 |
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15 | // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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16 | // ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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17 | // WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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18 | // DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
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19 | // ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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20 | // (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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21 | // LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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22 | // ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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23 | // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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24 | // SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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25 |
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26 | // The views and conclusions contained in the software and documentation are those
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27 | // of the authors and should not be interpreted as representing official policies,
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28 | // either expressed or implied, of the FreeBSD Project.
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29 |
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30 | #ifndef XPLCOMMON_WIN32_MUTEX_H
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31 | #define XPLCOMMON_WIN32_MUTEX_H
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32 | //------------------------------------------------------------------------------
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33 |
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34 | #include <windows.h>
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35 |
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36 | //------------------------------------------------------------------------------
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37 |
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38 | namespace xplcommon { namespace win32 {
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39 |
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40 | //------------------------------------------------------------------------------
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41 |
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42 | /**
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43 | * Mutual exclusion device implementation for Windows.
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44 | */
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45 | class Mutex
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46 | {
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47 | private:
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48 | /**
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49 | * The handle of the mutex.
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50 | */
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51 | CRITICAL_SECTION mutex;
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52 |
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53 | public:
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54 | /**
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55 | * Construct the mutex.
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56 | */
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57 | Mutex();
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58 |
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59 | /**
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60 | * Destroy the mutex.
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61 | */
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62 | ~Mutex();
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63 |
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64 | /**
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65 | * Lock the mutex. If the mutex is locked by another thread, the
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66 | * caller one waits until the other thread releases the mutex.
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67 | */
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68 | void lock();
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69 |
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70 | /**
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71 | * Try to lock the mutex. If the mutex is locked by another
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72 | * thread, this function returns false immediately. Otherwise it
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73 | * locks the mutex and returns true.
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74 | */
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75 | bool tryLock();
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76 |
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77 | /**
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78 | * Unlock the mutex.
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79 | */
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80 | void unlock();
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81 | };
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82 |
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83 | //------------------------------------------------------------------------------
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84 | // Inline definitions
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85 | //------------------------------------------------------------------------------
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86 |
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87 | inline Mutex::Mutex()
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88 | {
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89 | InitializeCriticalSection(&mutex);
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90 | }
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91 |
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92 | //------------------------------------------------------------------------------
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93 |
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94 | inline Mutex::~Mutex()
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95 | {
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96 | DeleteCriticalSection(&mutex);
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97 | }
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98 |
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99 | //------------------------------------------------------------------------------
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100 |
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101 | inline void Mutex::lock()
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102 | {
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103 | EnterCriticalSection(&mutex);
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104 | }
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105 |
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106 | //------------------------------------------------------------------------------
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107 |
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108 | inline bool Mutex::tryLock()
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109 | {
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110 | return TryEnterCriticalSection(&mutex);
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111 | }
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112 |
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113 | //------------------------------------------------------------------------------
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114 |
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115 | inline void Mutex::unlock()
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116 | {
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117 | LeaveCriticalSection(&mutex);
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118 | }
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119 |
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120 | //------------------------------------------------------------------------------
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121 |
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122 | } /* namespace xplcommon::win32 */ } /* namespace xplcommon */
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123 |
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124 | //------------------------------------------------------------------------------
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125 | #endif // XPLCOMMON_WIN32_MUTEX_H
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126 |
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127 | // Local Variables:
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128 | // mode: C++
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129 | // c-basic-offset: 4
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130 | // indent-tabs-mode: nil
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131 | // End:
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