hlswmaster-ng (now in c++)
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/***************************************************************************
* Copyright (C) 04/2006 by Olaf Rempel *
* razzor@kopf-tisch.de *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program; if not, write to the *
* Free Software Foundation, Inc., *
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
***************************************************************************/
#include "thread.h"
#define THREAD_STACKSIZE 65536
#define THREAD_READY 0x01
#define THREAD_RUNNING 0x02
#define THREAD_ENDED 0x03
Thread::Thread()
: arg(0), tid(0), state(THREAD_READY)
{}
Thread::~Thread()
{
switch (state) {
case THREAD_RUNNING:
cancel();
case THREAD_ENDED:
join();
case THREAD_READY:
break;
}
}
int Thread::start(void* arg_)
{
pthread_attr_t attr;
if (state != THREAD_READY)
return -1;
arg = arg_;
state = THREAD_RUNNING;
pthread_attr_init(&attr);
pthread_attr_setstacksize(&attr, THREAD_STACKSIZE);
if (pthread_create(&tid, &attr, (Thread::entry), this) != 0) {
state = THREAD_READY;
return -1;
}
return 0;
}
void Thread::cancel()
{
pthread_cancel(tid);
state = THREAD_ENDED;
}
bool Thread::isRunning() const
{
return (state == THREAD_RUNNING);
}
int Thread::join()
{
void* retval;
pthread_join(tid, &retval);
state = THREAD_READY;
return (int)retval;
}
void* Thread::entry(void* myself)
{
Thread* thread = (Thread*)myself;
int retval = thread->execute(thread->arg);
thread->state = THREAD_ENDED;
return (void*)retval;
}