src/jthread/win32/jthread.cpp

   1 /*
   2
   3     This file is a part of the JThread package, which contains some object-
   4     oriented thread wrappers for different thread implementations.
   5
   6     Copyright (c) 2000-2006  Jori Liesenborgs (jori.liesenborgs@gmail.com)
   7
   8     Permission is hereby granted, free of charge, to any person obtaining a
   9     copy of this software and associated documentation files (the "Software"),
  10     to deal in the Software without restriction, including without limitation
  11     the rights to use, copy, modify, merge, publish, distribute, sublicense,
  12     and/or sell copies of the Software, and to permit persons to whom the
  13     Software is furnished to do so, subject to the following conditions:
  14
  15     The above copyright notice and this permission notice shall be included in
  16     all copies or substantial portions of the Software.
  17
  18     THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  19     IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20     FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  21     THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  22     LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  23     FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  24     DEALINGS IN THE SOFTWARE.
  25
  26 */
  27
  28 #include "jthread/jthread.h"
  29
  30 #ifndef _WIN32_WCE
  31         #include <process.h>
  32 #endif // _WIN32_WCE
  33
  34 JThread::JThread()
  35 {
  36         retval = NULL;
  37         mutexinit = false;
  38         requeststop = false;
  39         running = false;
  40 }
  41
  42 JThread::~JThread()
  43 {
  44         Kill();
  45 }
  46
  47 void JThread::Stop() {
  48         runningmutex.Lock();
  49         requeststop = false;
  50         runningmutex.Unlock();
  51 }
  52
  53 int JThread::Start()
  54 {
  55         if (!mutexinit)
  56         {
  57                 if (!runningmutex.IsInitialized())
  58                 {
  59                         if (runningmutex.Init() < 0)
  60                                 return ERR_JTHREAD_CANTINITMUTEX;
  61                 }
  62                 if (!continuemutex.IsInitialized())
  63                 {
  64                         if (continuemutex.Init() < 0)
  65                                 return ERR_JTHREAD_CANTINITMUTEX;
  66                 }
  67                 if (!continuemutex2.IsInitialized())
  68                 {
  69                         if (continuemutex2.Init() < 0)
  70                                 return ERR_JTHREAD_CANTINITMUTEX;
  71                 }               mutexinit = true;
  72         }
  73
  74         runningmutex.Lock();
  75         if (running)
  76         {
  77                 runningmutex.Unlock();
  78                 return ERR_JTHREAD_ALREADYRUNNING;
  79         }
  80         requeststop = false;
  81         runningmutex.Unlock();
  82
  83         continuemutex.Lock();
  84 #ifndef _WIN32_WCE
  85         threadhandle = (HANDLE)_beginthreadex(NULL,0,TheThread,this,0,&threadid);
  86 #else
  87         threadhandle = CreateThread(NULL,0,TheThread,this,0,&threadid);
  88 #endif // _WIN32_WCE
  89         if (threadhandle == NULL)
  90         {
  91                 continuemutex.Unlock();
  92                 return ERR_JTHREAD_CANTSTARTTHREAD;
  93         }
  94
  95         /* Wait until 'running' is set */
  96
  97         runningmutex.Lock();
  98         while (!running)
  99         {
 100                 runningmutex.Unlock();
 101                 Sleep(1);
 102                 runningmutex.Lock();
 103         }
 104         runningmutex.Unlock();
 105
 106         continuemutex.Unlock();
 107
 108         continuemutex2.Lock();
 109         continuemutex2.Unlock();
 110
 111         return 0;
 112 }
 113
 114 int JThread::Kill()
 115 {
 116         runningmutex.Lock();
 117         if (!running)
 118         {
 119                 runningmutex.Unlock();
 120                 return ERR_JTHREAD_NOTRUNNING;
 121         }
 122         TerminateThread(threadhandle,0);
 123         CloseHandle(threadhandle);
 124         running = false;
 125         runningmutex.Unlock();
 126         return 0;
 127 }
 128
 129 bool JThread::IsRunning()
 130 {
 131         bool r;
 132
 133         runningmutex.Lock();
 134         r = running;
 135         runningmutex.Unlock();
 136         return r;
 137 }
 138
 139 bool JThread::StopRequested() {
 140         bool r;
 141
 142         runningmutex.Lock();
 143         r = requeststop;
 144         runningmutex.Unlock();
 145         return r;
 146 }
 147
 148 void *JThread::GetReturnValue()
 149 {
 150         void *val;
 151
 152         runningmutex.Lock();
 153         if (running)
 154                 val = NULL;
 155         else
 156                 val = retval;
 157         runningmutex.Unlock();
 158         return val;
 159 }
 160
 161 bool JThread::IsSameThread()
 162 {
 163         return GetCurrentThreadId() == threadid;
 164 }
 165
 166 #ifndef _WIN32_WCE
 167 UINT __stdcall JThread::TheThread(void *param)
 168 #else
 169 DWORD WINAPI JThread::TheThread(void *param)
 170 #endif // _WIN32_WCE
 171 {
 172         JThread *jthread;
 173         void *ret;
 174
 175         jthread = (JThread *)param;
 176
 177         jthread->continuemutex2.Lock();
 178         jthread->runningmutex.Lock();
 179         jthread->running = true;
 180         jthread->runningmutex.Unlock();
 181
 182         jthread->continuemutex.Lock();
 183         jthread->continuemutex.Unlock();
 184
 185         ret = jthread->Thread();
 186
 187         jthread->runningmutex.Lock();
 188         jthread->running = false;
 189         jthread->retval = ret;
 190         CloseHandle(jthread->threadhandle);
 191         jthread->runningmutex.Unlock();
 192         return 0;
 193 }
 194
 195 void JThread::ThreadStarted()
 196 {
 197         continuemutex2.Unlock();
 198 }
 199