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annotate deps/Platinum/ThirdParty/Neptune/Source/System/Posix/NptPosixSystem.cpp @ 0:3425707ddbf6

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author fraserofthenight
date Mon, 06 Jul 2009 08:06:28 -0700
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1 /*****************************************************************
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2 |
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3 | Neptune - System :: Posix Implementation
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4 |
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5 | (c) 2001-2003 Gilles Boccon-Gibod
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6 | Author: Gilles Boccon-Gibod (bok@bok.net)
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7 |
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8 ****************************************************************/
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9
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10 /*----------------------------------------------------------------------
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11 | includes
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12 +---------------------------------------------------------------------*/
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13 #include <stdio.h>
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14 #include <stdlib.h>
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15 #include <errno.h>
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16 #include <time.h>
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17 #include <sys/time.h>
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18 #include <pthread.h>
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19 #include <unistd.h>
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20
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21 #include "NptConfig.h"
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22 #include "NptTypes.h"
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23 #include "NptSystem.h"
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24 #include "NptResults.h"
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25 #include "NptDebug.h"
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26
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27 /*----------------------------------------------------------------------
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28 | NPT_PosixSystem
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29 +---------------------------------------------------------------------*/
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30 class NPT_PosixSystem
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31 {
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32 public:
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33 // class variables
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34 static NPT_PosixSystem System;
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35
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36 // methods
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37 NPT_PosixSystem();
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38 ~NPT_PosixSystem();
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39
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40 // members
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41 pthread_mutex_t m_SleepMutex;
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42 pthread_cond_t m_SleepCondition;
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43 };
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44 NPT_PosixSystem NPT_PosixSystem::System;
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45
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46 /*----------------------------------------------------------------------
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47 | NPT_PosixSystem::NPT_PosixSystem
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48 +---------------------------------------------------------------------*/
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49 NPT_PosixSystem::NPT_PosixSystem()
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50 {
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51 pthread_mutex_init(&m_SleepMutex, NULL);
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52 pthread_cond_init(&m_SleepCondition, NULL);
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53 }
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54
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55 /*----------------------------------------------------------------------
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56 | NPT_PosixSystem::~NPT_PosixSystem
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57 +---------------------------------------------------------------------*/
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58 NPT_PosixSystem::~NPT_PosixSystem()
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59 {
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60 pthread_cond_destroy(&m_SleepCondition);
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61 pthread_mutex_destroy(&m_SleepMutex);
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62 }
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63
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64 /*----------------------------------------------------------------------
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65 | NPT_System::GetProcessId
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66 +---------------------------------------------------------------------*/
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67 NPT_Result
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68 NPT_System::GetProcessId(NPT_UInt32& id)
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69 {
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70 id = getpid();
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71 return NPT_SUCCESS;
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72 }
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73
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74 /*----------------------------------------------------------------------
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75 | NPT_System::GetCurrentTimeStamp
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76 +---------------------------------------------------------------------*/
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77 NPT_Result
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78 NPT_System::GetCurrentTimeStamp(NPT_TimeStamp& now)
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79 {
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80 struct timeval now_tv;
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81
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82 // get current time from system
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83 if (gettimeofday(&now_tv, NULL)) {
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84 now.m_Seconds = 0;
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85 now.m_NanoSeconds = 0;
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86 return NPT_FAILURE;
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87 }
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88
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89 // convert format
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90 now.m_Seconds = now_tv.tv_sec;
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91 now.m_NanoSeconds = now_tv.tv_usec * 1000;
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92
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93 return NPT_SUCCESS;
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94 }
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95
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96 /*----------------------------------------------------------------------
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97 | NPT_System::Sleep
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98 +---------------------------------------------------------------------*/
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99 NPT_Result
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100 NPT_System::Sleep(const NPT_TimeInterval& duration)
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101 {
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102 struct timespec time_req;
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103 struct timespec time_rem;
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104 int result;
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105
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106 // setup the time value
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107 time_req.tv_sec = duration.m_Seconds;
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108 time_req.tv_nsec = duration.m_NanoSeconds;
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109
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110 // sleep
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111 do {
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112 result = nanosleep(&time_req, &time_rem);
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113 time_req = time_rem;
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114 } while (result == -1 && errno == EINTR);
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115
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116 return NPT_SUCCESS;
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117 }
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118
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119 /*----------------------------------------------------------------------
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120 | NPT_System::SleepUntil
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121 +---------------------------------------------------------------------*/
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122 NPT_Result
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123 NPT_System::SleepUntil(const NPT_TimeStamp& when)
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124 {
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125 struct timespec timeout;
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126 struct timeval now;
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127 int result;
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128
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129 // get current time from system
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130 if (gettimeofday(&now, NULL)) {
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131 return NPT_FAILURE;
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132 }
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133
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134 // setup timeout
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135 timeout.tv_sec = now.tv_sec + when.m_Seconds;
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136 timeout.tv_nsec = now.tv_usec * 1000 + when.m_NanoSeconds;
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137
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138 if (timeout.tv_nsec >= 1000000000) {
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139 timeout.tv_sec += timeout.tv_nsec / 1000000000;
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140 timeout.tv_nsec %= 1000000000;
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141 }
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142
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143 // sleep
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144 do {
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145 result = pthread_cond_timedwait(&NPT_PosixSystem::System.m_SleepCondition,
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146 &NPT_PosixSystem::System.m_SleepMutex,
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147 &timeout);
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148 if (result == ETIMEDOUT) {
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149 return NPT_SUCCESS;
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150 }
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151 } while (result == EINTR);
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152
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153 return NPT_FAILURE;
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154 }
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155
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156 /*----------------------------------------------------------------------
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157 | NPT_System::SetRandomSeed
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158 +---------------------------------------------------------------------*/
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159 NPT_Result
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160 NPT_System::SetRandomSeed(unsigned int seed)
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161 {
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162 srand(seed);
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163 return NPT_SUCCESS;
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164 }
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165
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166 /*----------------------------------------------------------------------
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167 | NPT_System::GetRandomInteger
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168 +---------------------------------------------------------------------*/
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169 NPT_UInt32
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170 NPT_System::GetRandomInteger()
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171 {
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172 static bool seeded = false;
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173 if (seeded == false) {
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174 NPT_TimeStamp now;
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175 GetCurrentTimeStamp(now);
3425707ddbf6 Initial import (hopefully this mercurial stuff works...)
fraserofthenight
parents:
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176 SetRandomSeed(now.m_NanoSeconds);
3425707ddbf6 Initial import (hopefully this mercurial stuff works...)
fraserofthenight
parents:
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177 seeded = true;
3425707ddbf6 Initial import (hopefully this mercurial stuff works...)
fraserofthenight
parents:
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178 }
3425707ddbf6 Initial import (hopefully this mercurial stuff works...)
fraserofthenight
parents:
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179
3425707ddbf6 Initial import (hopefully this mercurial stuff works...)
fraserofthenight
parents:
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180 return rand();
3425707ddbf6 Initial import (hopefully this mercurial stuff works...)
fraserofthenight
parents:
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181 }