Mercurial > ecos-v2_0-branch

annotate host/tools/Utils/common/eCosThreadUtils.h @ 823:19a153ac403c default tip

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* Added execute permissions to files missed in conversion from CVS
author alexs
date Thu, 08 May 2003 17:42:17 +0000
parents 6736c52df507
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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 //=================================================================
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26 //
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27 // eCosThreadUtils.h
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28 //
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29 //
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30 //=================================================================
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31 //=================================================================
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32 //#####DESCRIPTIONBEGIN####
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33 //
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34 // Author(s): sdf
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35 // Contributors: sdf
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36 // Date: 1999-04-01
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37 // Description: Threading-related utiltities
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38 // Usage:
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39 //
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40 //####DESCRIPTIONEND####
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41
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42 #ifndef _ECOSTHREADUTILS_H
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43 #define _ECOSTHREADUTILS_H
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44 #include "eCosStd.h"
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45 #include "Collections.h"
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46
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47 #ifndef _WIN32 // UNIX
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48 #ifndef NO_THREADS
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49 #include <pthread.h>
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50 #endif
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51 #endif
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52
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53 //=================================================================
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54 // This class handles threads in a host-independent manner.
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55 // It also contains a few thread-related functions such as Sleep
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56 //=================================================================
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57
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58 class CeCosThreadUtils {
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59 public:
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60
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61 #ifdef _WIN32
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62 typedef DWORD THREAD_ID;
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63 #else // UNIX
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64 #ifndef NO_THREADS
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65 typedef int THREAD_ID;
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66 #else
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67 typedef pthread_t THREAD_ID;
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68 #endif
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69 #endif
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70
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71 static THREAD_ID GetThreadId(); // Get my current thread ID, mostly for debugging
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72
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73 // CS supports a single system-wide critical sections (recursive mutexes).
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74 // You are expected to use macros ENTERCRITICAL and LEAVECRITICAL to use this class - these macros define
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75 // a block containing a CS object, which has the effect of creating a critical section.
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76 // Exit from the block (by whatever means, including an exception) causes the CS dtor
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77 // to be called so as to release the section.
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78
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79 class CS{
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80 public:
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81 static bool InCriticalSection(); // This thread owns the critical section
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82 CS();
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83 virtual ~CS();
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84 protected:
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85 static int m_nCriticalSectionLock; // The number of times the recursive mutex has been locked. Management of this allows us to avoid use of true recursive mutexes on UNIX.
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86 static THREAD_ID nCSOwner; // The thread owning the resource.
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87 #ifdef _WIN32
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88 static CRITICAL_SECTION cs; // The one and only critical section
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89 static bool bCSInitialized;
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90 #else // UNIX
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91 #ifndef NO_THREADS
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92 static pthread_mutex_t cs; // The one and only critical section
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93 #endif
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94 #endif
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95 };
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96
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97 #define ENTERCRITICAL {CeCosThreadUtils::CS c
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98 #define LEAVECRITICAL }
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99
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100 static int AtomicIncrement (int &n); // return old value
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101 static int AtomicDecrement (int &n); // return old value
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102
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103
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104 // Wait for this boolean to become true, subject to the given timeout
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105 // If the timeout happens first, the return code will be false - otherwise true
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106 static bool WaitFor (bool &b, int dTimeout=0x7fffffff);
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107
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108 ///////////////////////////////////////////////////////////////////////////
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109 // Define the characteristics of a callback procedure:
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110
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111 // A callback procedure, used both for thread entry points and thread completion callbacks
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112 typedef void (CALLBACK CallbackProc)(void *);
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113
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114 // Run a thread: pThreadFunc is the entry point (passed pParam). No notification of completion.
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115 static bool RunThread(CallbackProc *pThreadFunc, void *pParam, LPCTSTR pszName=_T("")) { return RunThread(pThreadFunc,pParam,0,0,pszName); }
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116 // Run a thread, setting the bool on completion
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117 static bool RunThread(CallbackProc *pThreadFunc, void *pParam, bool *pb, LPCTSTR pszName=_T("")) { *pb=false; return RunThread(pThreadFunc,pParam,0,pb,pszName); }
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118 // Run a thread, calling the callback on completion
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119 static bool RunThread(CallbackProc *pThreadFunc, void *pParam, CallbackProc *pCompletionFunc, LPCTSTR pszName=_T("")) { return RunThread(pThreadFunc,pParam,pCompletionFunc,pParam,pszName); }
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120
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121 static void Sleep (int nMsec);
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122
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123 protected:
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124
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125 // Run a thread: arbitrary callbcak
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126 static bool RunThread(CallbackProc *pThreadFunc, void *pParam, CallbackProc *pCompletionFunc, void *pCompletionParam, LPCTSTR pszName);
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127
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128 // This is the information that is passed to the host-specific thread proc. It is simply enough to call the thread entry point and
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129 // call the callback (or set the boolean) at the end.
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130 struct ThreadInfo {
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131 CallbackProc *pThreadFunc; // The thread proc is this function
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132 void *pThreadParam; // - called with this parameter
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133 CallbackProc *pCompletionFunc; // At the end - call this function
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134 void *pCompletionParam; // with this parameter
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135 String strName; // For debugging
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136 ThreadInfo (CallbackProc *_pThreadFunc,void *_pThreadParam,CallbackProc *_pCompletionFunc,void *_pCompletionParam,LPCTSTR pszName) :
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137 pThreadFunc(_pThreadFunc),
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138 pThreadParam(_pThreadParam),
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139 pCompletionFunc(_pCompletionFunc),
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140 pCompletionParam(_pCompletionParam),
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141 strName(pszName){}
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142 };
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143
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144 // THREADFUNC is the result type of the thread function
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145 #ifdef _WIN32
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146 typedef unsigned long THREADFUNC;
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147 static int CALLBACK FilterFunction(LPEXCEPTION_POINTERS p);
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148 #else // UNIX
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149 typedef void * THREADFUNC;
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150 #endif
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151 static THREADFUNC CALLBACK SThreadFunc (void *pParam);
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152
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153 };
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154
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155 #endif