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/* QuesoGLC
* A free implementation of the OpenGL Character Renderer (GLC)
* Copyright (c) 2002, 2004-2007, Bertrand Coconnier
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/* $Id: test2.c 679 2007-12-20 21:42:13Z bcoconni $ */
/** \file
* Check GLC routines in a multithreaded app when no GL context has been bound
*/
#include "GL/glc.h"
#include <stdio.h>
#include <stdlib.h>
#include <pthread.h>
#if defined __APPLE__ && defined __MACH__
#include <GLUT/glut.h>
#else
#include <GL/glut.h>
#endif
pthread_mutex_t mutex;
pthread_cond_t cond;
void* thread2(void *arg)
{
int i;
int ctx;
/* Since the mutex is locked when this thread is created execution suspend
* here waiting for the Main Thread to call pthread_cond_wait()
*/
printf("Thread2 : Try to lock mutex\n");
if (pthread_mutex_lock(&mutex)) {
printf("Thread2 : Can't lock mutex\n");
return NULL;
}
printf("Thread2 : Mutex locked\n");
/* Immediately unlock the mutex so that the Main Thread can execute after
* pthread_cond_wait() returns.
*/
if (pthread_mutex_unlock(&mutex)) {
printf("Thread2 : Can't unlock mutex\n");
return NULL;
}
printf("Thread2 : Mutex unlocked\n");
/* Send the signal to the Main Thread so that both begins synchronously to
* generate contexts.
*/
printf("Thread2 : sending signal\n");
if (pthread_cond_signal(&cond)) {
printf("Thread2 : Can't send signal\n");
return NULL;
}
printf("Thread2 : signal sent\n");
/* Generate 8 contexts */
for (i=0;i<8;i++) {
if (i==0)
printf("Thread2 : request context creation\n");
ctx = glcGenContext();
printf("Thread2 : context %d created\n", ctx);
}
/* Wait for context 12 to be created.
* Note that context 12 may have been created by the current thread
*/
i = 0;
while (!glcIsContext(12)) {
i++;
if (i>5000) {
i = 0;
printf("Thread2 : context 12 not yet created\n");
}
}
printf("Thread2 : context 12 is created\n");
printf("Thread2 : terminated\n");
return NULL;
}
int main(int argc, char **argv)
{
pthread_t t2;
int i;
int ctx;
/* Needed to initialize an OpenGL context */
glutInit(&argc, argv);
glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB);
glutCreateWindow("test2");
/* Initialize the mutex and the condition variable */
if (pthread_mutex_init(&mutex, NULL)) {
printf("Main Thread : can't create mutex\n");
return -1;
}
printf("Main Thread : Mutex created\n");
if (pthread_cond_init(&cond, NULL)) {
printf("Main Thread : can't initialize the condition variable\n");
return -1;
}
printf("Main Thread : Condition variable created\n");
/* Lock the mutex so that the 2nd Thread wait for the main thread to be ready
*/
if (pthread_mutex_lock(&mutex)) {
printf("Main Thread : can't lock mutex\n");
return -1;
}
printf("Main Thread : Mutex locked\n");
/* Create the 2nd thread */
if (pthread_create(&t2, NULL, thread2, NULL)) {
printf("Main Thread : can't create pthread\n");
return -1;
}
printf("Main Thread : created Thread2\n");
printf("Main Thread : wait for condition variable\n");
/* Wait for the signal from Thread 2 */
if (pthread_cond_wait(&cond, &mutex)) {
printf("Main Thread : failed to wait for condition variable\n");
return -1;
}
printf("Main Thread : Condition variable released\n");
/* Generate 8 contexts */
for (i=0; i<8; i++) {
if (i==0)
printf("Main thread : request context creation\n");
ctx = glcGenContext();
printf("Main Thread : context %d created\n", ctx);
}
glcContext(ctx);
printf("Main Thread : current context %d\n", glcGetCurrentContext());
/* Wait for context 12 to be created.
* Note that context 12 may have been created by the current thread
*/
i = 0;
while (!glcIsContext(12)) {
i++;
if (i>5000) {
i = 0;
printf("Main Thread : context 12 not yet created\n");
}
}
printf("Main Thread : context 12 is created\n");
/* Destroy the mutex and the condition variable */
if (pthread_cond_destroy(&cond)) {
printf("Main Thread : Can't destroy condition variable\n");
return -1;
}
printf("Main Thread : Condition variable destroyed\n");
/* The mutex has been locked when pthread_cond_wait() was successful so we
* have to unlock it
*/
if (pthread_mutex_unlock(&mutex)) {
printf("Main Thread : failed to unlock mutex\n");
}
if (pthread_mutex_destroy(&mutex)) {
printf("Main Thread : Can't destroy mutex\n");
return -1;
}
pthread_join(t2, NULL);
printf("Main Thread : Mutex destroyed\n");
printf("\nTests successful !\n");
return 0;
}
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