threadp.cc

   1 /*
   2     Copyright 2004-2005 Chris Tallon
   3
   4     This file is part of VOMP.
   5
   6     VOMP is free software; you can redistribute it and/or modify
   7     it under the terms of the GNU General Public License as published by
   8     the Free Software Foundation; either version 2 of the License, or
   9     (at your option) any later version.
  10
  11     VOMP is distributed in the hope that it will be useful,
  12     but WITHOUT ANY WARRANTY; without even the implied warranty of
  13     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14     GNU General Public License for more details.
  15
  16     You should have received a copy of the GNU General Public License
  17     along with VOMP; if not, write to the Free Software
  18     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  19 */
  20
  21 #include "threadp.h"
  22
  23 // Undeclared functions, only for use in this file to start the thread
  24 void threadPInternalStart(void *arg)
  25 {
  26   // I don't want signals
  27   sigset_t sigs;
  28   sigfillset(&sigs);
  29   pthread_sigmask(SIG_BLOCK, &sigs, NULL);
  30
  31   Thread *t = (Thread *)arg;
  32   t->threadInternalStart2();
  33 }
  34
  35 int ThreadP::threadStart()
  36 {
  37   pthread_cond_init(&threadCond, NULL);
  38   pthread_mutex_init(&threadCondMutex, NULL);
  39
  40   threadActive = 1;
  41   if (pthread_create(&pthread, NULL, (void*(*)(void*))threadPInternalStart, (void *)this) == -1) return 0;
  42   return 1;
  43 }
  44
  45 void ThreadP::threadStop()
  46 {
  47         if (threadActive) { // we need this, on some implementations this will fail, if already stopped
  48                 threadActive = 0;
  49                 // Signal thread here in case it's waiting
  50                 threadSignal();
  51                 pthread_join(pthread, NULL);
  52                 this->threadPostStopCleanup();
  53         }
  54 }
  55
  56
  57 void ThreadP::threadCancel()
  58 {
  59         if (threadActive) {
  60                 threadActive = 0;
  61                 pthread_cancel(pthread);
  62                 pthread_join(pthread, NULL);
  63                 this->threadPostStopCleanup();
  64         }
  65 }
  66
  67
  68 void ThreadP::threadCheckExit()
  69 {
  70   if (!threadActive) pthread_exit(NULL);
  71 }
  72
  73 void ThreadP::threadLock()
  74 {
  75   pthread_mutex_lock(&threadCondMutex);
  76 }
  77
  78 void ThreadP::threadUnlock()
  79 {
  80   pthread_mutex_unlock(&threadCondMutex);
  81 }
  82
  83 void ThreadP::threadSignal()
  84 {
  85   pthread_mutex_lock(&threadCondMutex);
  86   pthread_cond_signal(&threadCond);
  87   pthread_mutex_unlock(&threadCondMutex);
  88 }
  89
  90 void ThreadP::threadSignalNoLock()
  91 {
  92   pthread_cond_signal(&threadCond);
  93 }
  94
  95 void ThreadP::threadWaitForSignal()
  96 {
  97   pthread_cond_wait(&threadCond, &threadCondMutex);
  98 }
  99
 100 void ThreadP::threadWaitForSignalTimed(struct timespec* ts)
 101 {
 102   pthread_cond_timedwait(&threadCond, &threadCondMutex, ts);
 103 }
 104
 105 void ThreadP::threadSetKillable()
 106 {
 107   pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, NULL);
 108   pthread_setcanceltype(PTHREAD_CANCEL_ASYNCHRONOUS, NULL);
 109 }
 110
 111
 112 pthread_t ThreadP::getThreadID() // returns the ID of this thread
 113 {
 114   return pthread;
 115 }
 116
 117 // Static functions
 118
 119 void ThreadP::threadSuicide()
 120 {
 121   if(!pthread_detach(pthread_self()))
 122   {
 123     MILLISLEEP(1000);
 124     if(!pthread_detach(pthread_self()))
 125     {
 126       MILLISLEEP(1000);
 127       pthread_detach(pthread_self());
 128     }
 129   }
 130
 131   pthread_exit(NULL);
 132 }
 133
 134 pthread_t ThreadP::thisThreadID() // returns the ID of the calling thread
 135 {
 136   return pthread_self();
 137 }