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/* $Id$ -*- C -*- */
/* ===================================================================== */
/* */
/* = FILENAME */
/* Cond_Var_Test.c */
/* */
/* = DESCRIPTION */
/* Testing the platform for POSIX condition variables. This is not */
/* meant to be an exhaustive test at this point but more a sanity */
/* check that PACE works (at least somewhat) as advertised. */
/* This program simply creates some threads, waits on a condition */
/* variable, joins the threads, and then exits. */
/* */
/* This test is largely taken from the O'Reilly _Pthreads */
/* Programming_ book and accompanying example code. */
/* */
/* = AUTHOR */
/* Joe Hoffert <joeh@cs.wustl.edu> */
/* */
/* ===================================================================== */
#include "pace/stdio.h"
#include "pace/stdlib.h"
#include "pace/pthread.h"
#if defined (PACE_VXWORKS) && PACE_VXWORKS != 0
#include "vxworks_stub.c"
#endif /* VXWORKS */
#define NUM_THREADS 3
#define TCOUNT 10
#define COUNT_THRES 12
int count = 0;
int thread_ids[3] = {0,1,2};
#if defined (PACE_VXWORKS) && PACE_VXWORKS != 0
/* VxWorks does not handle the *_ININITALIZER values and we
* can not emulate it since it involves memory allocation for
* VxWorks.
*/
pace_pthread_mutex_t count_lock;
pace_pthread_cond_t count_hit_threshold;
#else
pace_pthread_mutex_t count_lock = PACE_PTHREAD_MUTEX_INITIALIZER;
pace_pthread_cond_t count_hit_threshold = PACE_PTHREAD_COND_INITIALIZER;
#endif
void *inc_count(void *idp)
{
int i = 0;
/*int *my_id = idp;*/
PACE_UNUSED_ARG (idp);
pace_sleep(1);
for (i = 0; i < TCOUNT; i++) {
pace_pthread_mutex_lock(&count_lock);
count++;
/* pace_printf("inc_counter(): thread %d, count = %d, unlocking mutex\n",
*my_id, count); */
if (count == COUNT_THRES) {
/* pace_printf("inc_count(): Thread %d, count %d\n", *my_id, count); */
pace_pthread_cond_signal(&count_hit_threshold);
}
pace_pthread_mutex_unlock(&count_lock);
}
return(NULL);
}
void *watch_count(void *idp)
{
/*int *my_id = idp;*/
PACE_UNUSED_ARG (idp);
/* pace_printf("watch_count(): thread %d\n", *my_id); */
pace_pthread_mutex_lock(&count_lock);
while (count < COUNT_THRES) {
pace_pthread_cond_wait(&count_hit_threshold, &count_lock);
/* pace_printf("watch_count(): thread %d, count %d\n", *my_id, count); */
}
pace_pthread_mutex_unlock(&count_lock);
return(NULL);
}
int
main()
{
int i;
pace_pthread_t threads[3];
#if defined (PACE_VXWORKS) && PACE_VXWORKS != 0
/* VxWorks does not handle the *_ININITALIZER values and we
* can not emulate it since it involves memory allocation for
* VxWorks.
*/
pace_pthread_mutex_init(&count_lock, 0);
pace_pthread_cond_init(&count_hit_threshold, 0);
#endif
pace_pthread_create(&threads[0], NULL, inc_count, (void *)&thread_ids[0]);
pace_pthread_create(&threads[1], NULL, inc_count, (void *)&thread_ids[1]);
pace_pthread_create(&threads[2], NULL, watch_count, (void *)&thread_ids[2]);
for (i = 0; i < NUM_THREADS; i++) {
pace_pthread_join(threads[i], NULL);
}
if (count < COUNT_THRES)
{
pace_printf ("### ERROR ###: count should be >= %d.\n",
COUNT_THRES);
pace_printf ("### ERROR ###: However, count == %d.\n",
count);
pace_exit (-1);
}
/* pace_printf ("main(): This should be the last print statement.\n"); */
#if defined (PACE_VXWORKS) && PACE_VXWORKS != 0
/* VxWorks does not handle the *_ININITALIZER values and we
* can not emulate it since it involves memory allocation for
* VxWorks. We need to explicitly delete the mutex and condition
* variable allocated by the init calls.
*/
pace_pthread_mutex_destroy(&count_lock);
pace_pthread_cond_destroy(&count_hit_threshold);
#endif /* PACE_VXWORKS && PACE_VXWORKS != 0 */
return 0;
}
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