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.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         running = false;
  39 }
  40
  41 JThread::~JThread()
  42 {
  43         Kill();
  44 }
  45
  46 int JThread::Start()
  47 {
  48         if (!mutexinit)
  49         {
  50                 if (!runningmutex.IsInitialized())
  51                 {
  52                         if (runningmutex.Init() < 0)
  53                                 return ERR_JTHREAD_CANTINITMUTEX;
  54                 }
  55                 if (!continuemutex.IsInitialized())
  56                 {
  57                         if (continuemutex.Init() < 0)
  58                                 return ERR_JTHREAD_CANTINITMUTEX;
  59                 }
  60                 if (!continuemutex2.IsInitialized())
  61                 {
  62                         if (continuemutex2.Init() < 0)
  63                                 return ERR_JTHREAD_CANTINITMUTEX;
  64                 }               mutexinit = true;
  65         }
  66
  67         runningmutex.Lock();
  68         if (running)
  69         {
  70                 runningmutex.Unlock();
  71                 return ERR_JTHREAD_ALREADYRUNNING;
  72         }
  73         runningmutex.Unlock();
  74
  75         continuemutex.Lock();
  76 #ifndef _WIN32_WCE
  77         threadhandle = (HANDLE)_beginthreadex(NULL,0,TheThread,this,0,&threadid);
  78 #else
  79         threadhandle = CreateThread(NULL,0,TheThread,this,0,&threadid);
  80 #endif // _WIN32_WCE
  81         if (threadhandle == NULL)
  82         {
  83                 continuemutex.Unlock();
  84                 return ERR_JTHREAD_CANTSTARTTHREAD;
  85         }
  86
  87         /* Wait until 'running' is set */
  88
  89         runningmutex.Lock();
  90         while (!running)
  91         {
  92                 runningmutex.Unlock();
  93                 Sleep(1);
  94                 runningmutex.Lock();
  95         }
  96         runningmutex.Unlock();
  97
  98         continuemutex.Unlock();
  99
 100         continuemutex2.Lock();
 101         continuemutex2.Unlock();
 102
 103         return 0;
 104 }
 105
 106 int JThread::Kill()
 107 {
 108         runningmutex.Lock();
 109         if (!running)
 110         {
 111                 runningmutex.Unlock();
 112                 return ERR_JTHREAD_NOTRUNNING;
 113         }
 114         TerminateThread(threadhandle,0);
 115         CloseHandle(threadhandle);
 116         running = false;
 117         runningmutex.Unlock();
 118         return 0;
 119 }
 120
 121 bool JThread::IsRunning()
 122 {
 123         bool r;
 124
 125         runningmutex.Lock();
 126         r = running;
 127         runningmutex.Unlock();
 128         return r;
 129 }
 130
 131 void *JThread::GetReturnValue()
 132 {
 133         void *val;
 134
 135         runningmutex.Lock();
 136         if (running)
 137                 val = NULL;
 138         else
 139                 val = retval;
 140         runningmutex.Unlock();
 141         return val;
 142 }
 143
 144 #ifndef _WIN32_WCE
 145 UINT __stdcall JThread::TheThread(void *param)
 146 #else
 147 DWORD WINAPI JThread::TheThread(void *param)
 148 #endif // _WIN32_WCE
 149 {
 150         JThread *jthread;
 151         void *ret;
 152
 153         jthread = (JThread *)param;
 154
 155         jthread->continuemutex2.Lock();
 156         jthread->runningmutex.Lock();
 157         jthread->running = true;
 158         jthread->runningmutex.Unlock();
 159
 160         jthread->continuemutex.Lock();
 161         jthread->continuemutex.Unlock();
 162
 163         ret = jthread->Thread();
 164
 165         jthread->runningmutex.Lock();
 166         jthread->running = false;
 167         jthread->retval = ret;
 168         CloseHandle(jthread->threadhandle);
 169         jthread->runningmutex.Unlock();
 170         return 0;
 171 }
 172
 173 void JThread::ThreadStarted()
 174 {
 175         continuemutex2.Unlock();
 176 }
 177