Mercurial > ecos-v3_0-branch

annotate host/tools/Utils/common/eCosThreadUtils.cpp @ 76:435cced73e2f ecos-v1_3_1-release

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eCos v1.3.1 merged from eCos master repository on 2000-03-27-23:22:51-BST
author jlarmour
date Tue, 28 Mar 2000 14:10:45 +0000
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children 6736c52df507
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76
435cced73e2f eCos v1.3.1 merged from eCos master repository on 2000-03-27-23:22:51-BST
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1 //####COPYRIGHTBEGIN####
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2 //
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3 // ----------------------------------------------------------------------------
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4 // Copyright (C) 1998, 1999, 2000 Red Hat, Inc.
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5 //
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6 // This program is part of the eCos host tools.
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7 //
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8 // This program is free software; you can redistribute it and/or modify it
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9 // under the terms of the GNU General Public License as published by the Free
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10 // Software Foundation; either version 2 of the License, or (at your option)
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11 // any later version.
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12 //
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13 // This program is distributed in the hope that it will be useful, but WITHOUT
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14 // ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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15 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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16 // more details.
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17 //
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18 // You should have received a copy of the GNU General Public License along with
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19 // this program; if not, write to the Free Software Foundation, Inc.,
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20 // 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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21 //
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22 // ----------------------------------------------------------------------------
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23 //
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24 //####COPYRIGHTEND####
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25 #include "eCosThreadUtils.h"
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26 #include "eCosTrace.h"
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27
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28 CeCosThreadUtils::THREAD_ID CeCosThreadUtils::CS::nCSOwner=(CeCosThreadUtils::THREAD_ID)-1;
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29 int CeCosThreadUtils::CS::m_nCriticalSectionLock=0;
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30 #ifdef _WIN32
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31 CRITICAL_SECTION CeCosThreadUtils::CS::cs;
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32 bool CeCosThreadUtils::CS::bCSInitialized=false;
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33 #else // UNIX
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34 // Static recursive mutex for unix critical section
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35 #ifndef NO_THREADS
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36 pthread_mutex_t CeCosThreadUtils::CS::cs = PTHREAD_MUTEX_INITIALIZER;
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37 #endif
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38 #endif
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39
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40
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41 CeCosThreadUtils::THREAD_ID CeCosThreadUtils::GetThreadId()
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42 {
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43 return
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44 #ifdef _WIN32
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45 GetCurrentThreadId();
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46 #else // UNIX
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47 #ifdef NO_THREADS
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48 42;
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49 #else
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50 pthread_self();
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51 #endif
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52 #endif
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53 }
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54
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55 // Wait for the specified Boolean to turn true or the timeout to occur
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56 // The value of the Boolean is returned as result
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57 bool CeCosThreadUtils::WaitFor (bool &b, Duration dTimeout)
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58 {
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59 Time t=Now();
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60 do {
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61 if(b){
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62 break;
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63 }
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64 Sleep(250);
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65 } while (Now()-t<dTimeout);
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66 return b;
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67 }
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68
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69 // This function spawns a thread and causes it to run asynchrously.
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70 // The callback may be
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71 // A function, which is called when the thread completes
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72 // A boolean, which is set when the thread completes
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73 // Null, in which case no notification is received of thread completion
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74 // pParam is passed to the thread function pThreadFunc on thread initiation.
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75
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76 bool CeCosThreadUtils::RunThread(CallbackProc *pThreadFunc, void *pParam, CallbackProc *pCompletionFunc, void *pCompletionParam, LPCTSTR pszName)
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77 {
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78 TRACE(_T("RunThread %s\n"),pszName);
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79 // Do not spawn a thread while in possession of a mutex
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80 // ENTERCRITICAL;
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81 // VTRACE(_T("csl=%d\n"),CS::m_nCriticalSectionLock);
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82 // assert(1==CS::m_nCriticalSectionLock);
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83 // LEAVECRITICAL;
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84
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85 ThreadInfo *pInfo=new ThreadInfo(pThreadFunc,pParam,pCompletionFunc,pCompletionParam,pszName); // SThreadFunc will delete
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86 bool rc=false;
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87
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88 #ifdef _WIN32
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89 // FIXME: CreateThread incompatible with C runtime calls?
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90 DWORD dwID;
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91 HANDLE hThread=CreateThread(NULL,0,SThreadFunc, pInfo, 0, &dwID);
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92 if(hThread){
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93 TRACE(_T("RunThread: - new thread=%x\n"),dwID);
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94 ::CloseHandle(hThread);
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95 rc=true;
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96 } else {
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97 ERROR(_T("Failed to create thread\n"));
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98 }
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99 #else // UNIX
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100 #ifdef NO_THREADS
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101 assert(false);
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102 #else
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103 VTRACE(_T("RunThread():Calling pthread_create()\n"));
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104 pthread_t hThread;
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105 int n=pthread_create(&hThread, NULL, SThreadFunc, pInfo);
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106 TRACE( _T("RunThread: - non-blocking call (new thread=%x)\n"),hThread);
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107 VTRACE(_T("RunThread(): pthread_create() returned <%d>\n"), n);
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108 if (n != 0) {
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109 ERROR(_T("RunThread(): pthread_create failed - %s\n"),strerror(errno));
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110 } else {
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111
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112 VTRACE(_T("RunThread(): Calling pthread_detach\n"));
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113 int n = pthread_detach(hThread);
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114
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115 if (0==n) {
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116 rc=true;
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117 } else {
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118 ERROR(_T("RunThread(): pthread_detach failed - %s\n"),strerror(errno));
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119 hThread=0;
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120 }
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121 }
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122 VTRACE(_T("RunThread(): returned from pthread calls - exiting RunThread()\n"));
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123 #endif
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124 #endif
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125 if(!rc){
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126 delete pInfo;
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127 }
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128 return rc;
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129
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130 }
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131
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132 #ifdef _WIN32
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133 int CALLBACK CeCosThreadUtils::FilterFunction(EXCEPTION_POINTERS *p)
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134 {
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135 EXCEPTION_RECORD *pRec =p->ExceptionRecord;
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136 TRACE(_T("!!!Exception!!! address=%08x code=%08x\n"),pRec->ExceptionAddress,pRec->ExceptionCode);
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137 /*
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138 CONTEXT *pContext=p->ContextRecord;
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139 const unsigned char *ESP=(const unsigned char *)pContext->Esp;
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140 for(int i=0;i<16;i++){
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141 TRACE(_T("%08X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X\n"),ESP,
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142 ESP[0],ESP[1],ESP[2],ESP[3],ESP[4],ESP[5],ESP[6],ESP[7],ESP[8],ESP[9],ESP[10],ESP[11],ESP[12],ESP[13],ESP[14],ESP[15]);
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143 ESP+=16;
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144 }
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145 */
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146 return EXCEPTION_EXECUTE_HANDLER;
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147 }
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148 #endif
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149
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150 CeCosThreadUtils::THREADFUNC CALLBACK CeCosThreadUtils::SThreadFunc (void *pParam)
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151 {
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152 VTRACE(_T("SThreadFunc()\n"));
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153 ThreadInfo *pInfo=(ThreadInfo*)pParam;
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154 #ifdef _WIN32
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155 __try {
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156 // Call what we are instructed to (e.g. LocalThreadFunc):
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157 pInfo->pThreadFunc(pInfo->pThreadParam);
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158 }
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159 __except ( CeCosThreadUtils::FilterFunction(GetExceptionInformation() ))
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160 {
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161 TRACE(_T("Handling exception!!!...\n"));
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162 }
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163 #else // UNIX
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164 try {
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165 // Call what we are instructed to (e.g. LocalThreadFunc):
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166 pInfo->pThreadFunc(pInfo->pThreadParam);
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167 }
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168 catch (...){
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169 TRACE(_T("Exception caught in SThreadFunc!!!\n"));
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170 }
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171 #endif
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172
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173 // Call the Callback:
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174 TRACE(_T("SThreadFunc - invoking callback\n"));
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175 if(pInfo->pCompletionFunc){
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176 pInfo->pCompletionFunc (pInfo->pCompletionParam);
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177 } else if (pInfo->pCompletionParam) {
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178 // No function - just a flag:
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179 *(bool *)pInfo->pCompletionParam=true;
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180 }
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181 // No more references to pInfo->pTest from now on...
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182 VTRACE(_T("SThreadFunc(): deleting (ThreadInfo)pInfo\n"));
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183 delete pInfo;
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184 TRACE(_T("SThreadFunc exiting\n"));
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185 return 0;
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186 }
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187
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188 int CeCosThreadUtils::CS::AtomicIncrement (int &n)
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189 {
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190 int rc;
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191 ENTERCRITICAL;
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192 rc=n++;
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193 LEAVECRITICAL;
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194 return rc;
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195 }
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196
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197 int CeCosThreadUtils::CS::AtomicDecrement (int &n)
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198 {
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199 int rc;
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200 ENTERCRITICAL;
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201 rc=n--;
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202 LEAVECRITICAL;
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203 return rc;
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204 }
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205
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206 CeCosThreadUtils::CS::CS()
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207 {
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208 // Get mutex lock; block until available unless current
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209 // thread already owns the mutex.
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210 if(GetThreadId()!=nCSOwner){
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211 VTRACE(_T("%x try CS\n"),GetThreadId());
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212 #ifdef _WIN32
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213 if(!bCSInitialized){
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214 InitializeCriticalSection(&cs);
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215 bCSInitialized=true;
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216 }
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217 ::EnterCriticalSection(&cs);
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218 #else // UNIX
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219 #ifndef NO_THREADS
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220 pthread_mutex_lock(&cs);
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221 #endif
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222 #endif
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223 nCSOwner=GetThreadId();
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224 VTRACE(_T("%x has CS count=%d\n"),GetThreadId(),m_nCriticalSectionLock);//sdf
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225 }
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226 m_nCriticalSectionLock++;
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227 }
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228
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229 CeCosThreadUtils::CS::~CS()
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230 {
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231 m_nCriticalSectionLock--;
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232 assert(m_nCriticalSectionLock>=0);
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233 if(0==m_nCriticalSectionLock){
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234 nCSOwner=(THREAD_ID)-1;
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235 VTRACE(_T("%x leaves CS count=%d\n"),GetThreadId(),m_nCriticalSectionLock);
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236
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237 // Release mutex lock.
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238 #ifdef _WIN32
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239 ::LeaveCriticalSection(&cs);
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240 #else // UNIX
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241 #ifndef NO_THREADS
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242 pthread_mutex_unlock(&cs);
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243 #endif
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244 #endif
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245 }
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246 }
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247