1 | // Copyright (c) 2012 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_EVENT_H
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31 | #define XPLCOMMON_WIN32_EVENT_H
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32 | //------------------------------------------------------------------------------
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33 |
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34 | #include "../Failable.h"
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35 |
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36 | #include <windows.h>
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37 |
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38 | //------------------------------------------------------------------------------
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39 |
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40 | namespace xplcommon { namespace win32 {
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41 |
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42 | //------------------------------------------------------------------------------
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43 |
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44 | class Waiter;
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45 |
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46 | //------------------------------------------------------------------------------
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47 |
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48 | /**
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49 | * Wrapper for an event.
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50 | */
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51 | class Event : public ::xplcommon::Failable
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52 | {
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53 | private:
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54 | /**
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55 | * The handle of the event.
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56 | */
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57 | HANDLE handle;
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58 |
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59 | /**
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60 | * The object waiting for the event.
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61 | */
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62 | Waiter* waiter;
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63 |
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64 | public:
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65 | /**
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66 | * Construct the event.
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67 | */
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68 | Event();
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69 |
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70 | /**
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71 | * Destroy the event. It will be removed from the waiter if it is
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72 | * in one.
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73 | */
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74 | ~Event();
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75 |
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76 | /**
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77 | * Get the handle of the event.
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78 | */
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79 | HANDLE getHandle() const;
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80 |
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81 | /**
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82 | * Get the waiter.
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83 | */
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84 | Waiter* getWaiter() const;
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85 |
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86 | /**
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87 | * Register the event with the given waiter. If it is already
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88 | * registered with a waiter, it will be removed from that.
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89 | */
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90 | void addTo(Waiter& w);
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91 |
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92 | /**
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93 | * Remove the object from the waiter it is registered with.
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94 | */
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95 | void removeFromWaiter();
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96 |
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97 | /**
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98 | * Set the event.
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99 | */
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100 | void fire();
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101 |
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102 | /**
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103 | * Clear the event.
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104 | *
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105 | * @return if clearing succeeded.
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106 | */
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107 | bool clear();
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108 | };
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109 |
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110 | //------------------------------------------------------------------------------
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111 | // Inline definitions
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112 | //------------------------------------------------------------------------------
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113 |
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114 | inline Event::Event() :
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115 | handle(CreateEvent(0, true, false, 0)),
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116 | waiter(0)
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117 | {
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118 | if (handle==0) setErrorCode(GetLastError());
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119 | }
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120 |
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121 | //------------------------------------------------------------------------------
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122 |
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123 | inline Event::~Event()
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124 | {
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125 | removeFromWaiter();
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126 | CloseHandle(handle);
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127 | }
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128 |
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129 | //------------------------------------------------------------------------------
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130 |
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131 | inline HANDLE Event::getHandle() const
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132 | {
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133 | return handle;
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134 | }
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135 |
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136 | //------------------------------------------------------------------------------
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137 |
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138 | inline Waiter* Event::getWaiter() const
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139 | {
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140 | return waiter;
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141 | }
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142 |
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143 | //------------------------------------------------------------------------------
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144 |
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145 | inline void Event::fire()
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146 | {
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147 | if (!SetEvent(handle)) {
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148 | setErrorCode(GetLastError());
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149 | }
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150 | }
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151 |
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152 | //------------------------------------------------------------------------------
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153 |
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154 | inline bool Event::clear()
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155 | {
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156 | if (!ResetEvent(handle)) {
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157 | setErrorCode(GetLastError());
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158 | return false;
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159 | } else {
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160 | return true;
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161 | }
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162 | }
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163 |
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164 | //------------------------------------------------------------------------------
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165 |
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166 | } /* namespace xplcommon::win32 */ } /* namespace xplcommon */
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167 |
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168 | //------------------------------------------------------------------------------
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169 | #endif // XPLCOMMON_WIN32_EVENT_H
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170 |
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171 | // Local Variables:
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172 | // mode: C++
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173 | // c-basic-offset: 4
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174 | // indent-tabs-mode: nil
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175 | // End:
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