mirror of
https://github.com/ioacademy-jikim/debugging
synced 2025-06-09 00:46:12 +00:00
95 lines
1.8 KiB
C
95 lines
1.8 KiB
C
/*
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* pthread_cond_wait() test program.
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* See also https://bugs.kde.org/show_bug.cgi?id=235681.
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*/
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#include <string.h>
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#include <stdio.h>
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#include <assert.h>
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#include <pthread.h>
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#include <errno.h>
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#include <unistd.h>
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pthread_mutex_t mutex;
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pthread_cond_t cond_var;
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int status;
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int silent;
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static void *run_fn(void *v)
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{
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int rc;
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if (!silent)
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fprintf(stderr, "run_fn starting\n");
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rc = pthread_mutex_lock(&mutex);
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assert(!rc);
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while (!status) {
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if (!silent)
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fprintf(stderr, "run_fn(): status==0\n");
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rc = pthread_cond_wait(&cond_var, &mutex);
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assert(!rc);
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if (!silent)
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fprintf(stderr, "run_fn(): woke up\n");
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}
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if (!silent)
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fprintf(stderr, "run_fn(): status==1\n");
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rc = pthread_mutex_unlock(&mutex);
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assert(!rc);
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if (!silent)
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fprintf(stderr, "run_fn done\n");
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return NULL;
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}
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int main(int argc, char **argv)
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{
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int rc;
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pthread_t other_thread;
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if (argc > 1)
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silent = 1;
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rc = pthread_mutex_init(&mutex, NULL);
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assert(!rc);
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rc = pthread_cond_init(&cond_var, NULL);
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assert(!rc);
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status = 0;
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rc = pthread_create(&other_thread, NULL, run_fn, NULL);
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assert(!rc);
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/* yield the processor, and give the other thread a chance to get into the while loop */
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if (!silent)
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fprintf(stderr, "main(): sleeping...\n");
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sleep(1);
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rc = pthread_mutex_lock(&mutex);
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assert(!rc);
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/**** BEGIN CS *****/
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if (!silent)
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fprintf(stderr, "main(): status=1\n");
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status = 1;
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rc = pthread_cond_broadcast(&cond_var);
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assert(!rc);
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/**** END CS *****/
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rc = pthread_mutex_unlock(&mutex);
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assert(!rc);
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if (!silent)
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fprintf(stderr, "joining...\n");
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rc = pthread_join(other_thread, NULL);
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assert(!rc);
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fprintf(stderr, "Done.\n");
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return 0;
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}
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