1 | /* -*- C++ -*- */ |
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2 | |
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3 | /* |
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4 | |
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5 | Heap Layers: An Extensible Memory Allocation Infrastructure |
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6 | |
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7 | Copyright (C) 2000-2003 by Emery Berger |
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8 | http://www.cs.umass.edu/~emery |
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9 | emery@cs.umass.edu |
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10 | |
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11 | This program is free software; you can redistribute it and/or modify |
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12 | it under the terms of the GNU General Public License as published by |
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13 | the Free Software Foundation; either version 2 of the License, or |
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14 | (at your option) any later version. |
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15 | |
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16 | This program is distributed in the hope that it will be useful, |
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17 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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18 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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19 | GNU General Public License for more details. |
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20 | |
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21 | You should have received a copy of the GNU General Public License |
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22 | along with this program; if not, write to the Free Software |
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23 | Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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24 | |
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25 | */ |
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26 | |
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27 | #include <assert.h> |
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28 | #include <stdio.h> |
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29 | |
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30 | |
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31 | #ifndef _TIMER_H_ |
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32 | #define _TIMER_H_ |
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33 | |
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34 | /** |
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35 | * @class Timer |
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36 | * @brief A portable class for high-resolution timing. |
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37 | * |
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38 | * This class simplifies timing measurements across a number of platforms. |
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39 | * |
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40 | * @code |
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41 | * Timer t; |
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42 | * t.start(); |
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43 | * // do some work |
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44 | * t.stop(); |
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45 | * cout << "That took " << (double) t << " seconds." << endl; |
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46 | * @endcode |
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47 | * |
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48 | */ |
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49 | |
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50 | #ifdef __APPLE__ |
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51 | #include <sys/time.h> |
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52 | #endif |
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53 | |
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54 | #if defined(linux) && defined(__GNUG__) && defined(__i386__) |
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55 | |
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56 | #include <stdio.h> |
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57 | #include <limits.h> |
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58 | #include <time.h> |
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59 | #include <unistd.h> |
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60 | #include <fcntl.h> |
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61 | #include <string.h> |
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62 | |
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63 | static void getTime (unsigned long& tlo, unsigned long& thi) { |
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64 | asm volatile ("rdtsc" |
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65 | : "=a"(tlo), |
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66 | "=d" (thi)); |
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67 | } |
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68 | |
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69 | |
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70 | static double getFrequency (void) { |
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71 | static double freq = 0.0; |
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72 | static bool initialized = false; |
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73 | unsigned long LTime0, LTime1, HTime0, HTime1; |
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74 | if (!initialized) { |
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75 | |
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76 | // Compute MHz directly. |
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77 | // Wait for approximately one second. |
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78 | |
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79 | getTime (LTime0, HTime0); |
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80 | // printf ("waiting...\n"); |
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81 | sleep (1); |
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82 | // printf ("done.\n"); |
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83 | getTime (LTime1, HTime1); |
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84 | |
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85 | freq = (double)(LTime1 - LTime0) + (double)(UINT_MAX)*(double)(HTime1 - HTime0); |
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86 | if (LTime1 < LTime0) { |
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87 | freq -= (double)UINT_MAX; |
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88 | } |
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89 | initialized = true; |
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90 | |
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91 | } else { |
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92 | // printf ("wha?\n"); |
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93 | } |
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94 | return freq; |
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95 | } |
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96 | |
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97 | // FIX ME |
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98 | #include <iostream> |
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99 | using namespace std; |
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100 | |
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101 | namespace HL { |
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102 | |
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103 | class Timer { |
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104 | public: |
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105 | Timer (void) |
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106 | : timeElapsed (0.0) |
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107 | { |
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108 | _frequency = getFrequency(); |
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109 | // printf ("wooo!\n"); |
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110 | // printf ("freq = %lf\n", frequency); |
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111 | } |
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112 | void start (void) { |
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113 | getTime (currentLo, currentHi); |
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114 | } |
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115 | void stop (void) { |
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116 | unsigned long lo, hi; |
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117 | getTime (lo, hi); |
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118 | double now = (double) hi * 4294967296.0 + lo; |
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119 | double prev = (double) currentHi * 4294967296.0 + currentLo; |
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120 | timeElapsed = (now - prev) / _frequency; |
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121 | } |
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122 | |
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123 | operator double (void) { |
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124 | return timeElapsed; |
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125 | } |
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126 | |
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127 | private: |
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128 | double timeElapsed; |
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129 | unsigned long currentLo, currentHi; |
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130 | double _frequency; |
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131 | }; |
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132 | |
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133 | }; |
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134 | |
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135 | #else |
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136 | |
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137 | |
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138 | #ifdef __SVR4 // Solaris |
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139 | #include <sys/time.h> |
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140 | #include <unistd.h> |
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141 | #include <fcntl.h> |
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142 | #include <sys/procfs.h> |
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143 | #include <stdio.h> |
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144 | #endif // __SVR4 |
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145 | |
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146 | #include <time.h> |
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147 | |
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148 | #if defined(unix) || defined(__linux) |
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149 | #include <sys/time.h> |
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150 | #include <unistd.h> |
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151 | #endif |
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152 | |
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153 | |
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154 | #ifdef __sgi |
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155 | #include <sys/types.h> |
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156 | #include <sys/times.h> |
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157 | #include <limits.h> |
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158 | #endif |
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159 | |
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160 | |
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161 | #if defined(_WIN32) |
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162 | #include <windows.h> |
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163 | #endif |
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164 | |
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165 | |
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166 | #if defined(__BEOS__) |
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167 | #include <OS.h> |
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168 | #endif |
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169 | |
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170 | |
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171 | namespace HL { |
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172 | |
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173 | class Timer { |
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174 | |
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175 | public: |
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176 | |
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177 | /// Initializes the timer. |
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178 | Timer (void) |
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179 | #if !defined(_WIN32) |
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180 | : _starttime (0), |
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181 | _elapsedtime (0) |
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182 | #endif |
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183 | { |
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184 | } |
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185 | |
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186 | /// Start the timer. |
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187 | void start (void) { _starttime = _time(); } |
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188 | |
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189 | /// Stop the timer. |
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190 | void stop (void) { _elapsedtime += _time() - _starttime; } |
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191 | |
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192 | /// Reset the timer. |
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193 | void reset (void) { _starttime = _elapsedtime; } |
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194 | |
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195 | #if 0 |
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196 | // Set the timer. |
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197 | void set (double secs) { _starttime = 0; _elapsedtime = _sectotime (secs);} |
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198 | #endif |
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199 | |
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200 | /// Return the number of seconds elapsed. |
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201 | operator double (void) { return _timetosec (_elapsedtime); } |
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202 | |
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203 | static double currentTime (void) { TimeType t; t = _time(); return _timetosec (t); } |
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204 | |
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205 | |
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206 | private: |
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207 | |
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208 | // The _timer variable will be different depending on the OS. |
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209 | // We try to use the best timer available. |
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210 | |
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211 | #ifdef __sgi |
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212 | #define TIMER_FOUND |
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213 | |
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214 | long _starttime, _elapsedtime; |
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215 | |
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216 | long _time (void) { |
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217 | struct tms t; |
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218 | long ticks = times (&t); |
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219 | return ticks; |
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220 | } |
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221 | |
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222 | static double _timetosec (long t) { |
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223 | return ((double) (t) / CLK_TCK); |
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224 | } |
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225 | |
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226 | static long _sectotime (double sec) { |
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227 | return (long) sec * CLK_TCK; |
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228 | } |
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229 | #endif |
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230 | |
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231 | #ifdef __SVR4 // Solaris |
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232 | #define TIMER_FOUND |
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233 | typedef hrtime_t TimeType; |
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234 | TimeType _starttime, _elapsedtime; |
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235 | |
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236 | static TimeType _time (void) { |
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237 | return gethrtime(); |
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238 | } |
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239 | |
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240 | static TimeType _sectotime (double sec) { return (hrtime_t) (sec * 1.0e9); } |
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241 | |
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242 | static double _timetosec (TimeType& t) { |
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243 | return ((double) (t) / 1.0e9); |
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244 | } |
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245 | #endif // __SVR4 |
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246 | |
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247 | #if defined(MAC) || defined(macintosh) |
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248 | #define TIMER_FOUND |
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249 | double _starttime, _elapsedtime; |
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250 | |
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251 | double _time (void) { |
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252 | return get_Mac_microseconds(); |
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253 | } |
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254 | |
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255 | double _timetosec (hrtime_t& t) { |
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256 | return t; |
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257 | } |
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258 | #endif // MAC |
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259 | |
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260 | #ifdef _WIN32 |
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261 | #define TIMER_FOUND |
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262 | |
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263 | #ifndef __GNUC__ |
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264 | class TimeType { |
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265 | public: |
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266 | TimeType (void) |
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267 | { |
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268 | largeInt.QuadPart = 0; |
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269 | } |
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270 | operator double& (void) { return (double&) largeInt.QuadPart; } |
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271 | operator LARGE_INTEGER& (void) { return largeInt; } |
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272 | double timeToSec (void) { |
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273 | return (double) largeInt.QuadPart / getFreq(); |
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274 | } |
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275 | private: |
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276 | double getFreq (void) { |
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277 | QueryPerformanceFrequency (&freq); |
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278 | return (double) freq.QuadPart; |
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279 | } |
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280 | |
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281 | LARGE_INTEGER largeInt; |
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282 | LARGE_INTEGER freq; |
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283 | }; |
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284 | |
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285 | TimeType _starttime, _elapsedtime; |
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286 | |
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287 | static TimeType _time (void) { |
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288 | TimeType t; |
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289 | int r = QueryPerformanceCounter (&((LARGE_INTEGER&) t)); |
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290 | assert (r); |
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291 | return t; |
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292 | } |
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293 | |
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294 | static double _timetosec (TimeType& t) { |
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295 | return t.timeToSec(); |
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296 | } |
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297 | #else |
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298 | typedef DWORD TimeType; |
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299 | DWORD _starttime, _elapsedtime; |
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300 | static DWORD _time (void) { |
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301 | return GetTickCount(); |
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302 | } |
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303 | |
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304 | static double _timetosec (DWORD& t) { |
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305 | return (double) t / 100000.0; |
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306 | } |
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307 | static unsigned long _sectotime (double sec) { |
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308 | return (unsigned long)(sec); |
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309 | } |
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310 | #endif |
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311 | #endif // _WIN32 |
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312 | |
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313 | |
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314 | #ifdef __BEOS__ |
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315 | #define TIMER_FOUND |
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316 | bigtime_t _starttime, _elapsedtime; |
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317 | bigtime_t _time(void) { |
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318 | return system_time(); |
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319 | } |
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320 | double _timetosec (bigtime_t& t) { |
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321 | return (double) t / 1000000.0; |
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322 | } |
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323 | |
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324 | bigtime_t _sectotime (double sec) { |
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325 | return (bigtime_t)(sec * 1000000.0); |
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326 | } |
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327 | #endif // __BEOS__ |
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328 | |
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329 | #ifndef TIMER_FOUND |
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330 | |
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331 | typedef long TimeType; |
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332 | TimeType _starttime, _elapsedtime; |
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333 | |
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334 | static TimeType _time (void) { |
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335 | struct timeval t; |
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336 | gettimeofday (&t, NULL); |
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337 | return t.tv_sec * 1000000 + t.tv_usec; |
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338 | } |
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339 | |
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340 | static double _timetosec (TimeType t) { |
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341 | return ((double) (t) / 1000000.0); |
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342 | } |
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343 | |
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344 | static TimeType _sectotime (double sec) { |
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345 | return (TimeType) (sec * 1000000.0); |
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346 | } |
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347 | |
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348 | #endif // TIMER_FOUND |
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349 | |
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350 | #undef TIMER_FOUND |
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351 | |
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352 | }; |
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353 | |
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354 | |
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355 | #ifdef __SVR4 // Solaris |
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356 | class VirtualTimer : public Timer { |
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357 | public: |
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358 | hrtime_t _time (void) { |
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359 | return gethrvtime(); |
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360 | } |
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361 | }; |
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362 | #endif |
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363 | |
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364 | }; |
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365 | |
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366 | #endif |
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367 | |
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368 | #endif |
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