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Viewing changes to Development/languages/C/Samples/pthreads/condition.c

  • Committer: Suren A. Chilingaryan
  • Date: 2009-04-09 03:21:08 UTC
  • Revision ID: csa@dside.dyndns.org-20090409032108-w4edamdh4adrgdu3
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Development/languages/C/Samples/pthreads/condition.c
 
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#include <stdio.h>
 
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#include <stdlib.h>
 
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#include <unistd.h>
 
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#include <pthread.h>
 
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pthread_mutex_t mutex;
 
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pthread_cond_t cond;
 
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pthread_t thread1, thread2, thread3;
 
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void *tfunc1(void *attr) {
 
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    pthread_mutex_lock(&mutex);
 
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    printf("locked1\n");
 
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    sleep(2);
 
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    printf("wait1 finished\n");
 
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    pthread_cond_wait(&cond,&mutex);
 
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    pthread_mutex_unlock(&mutex);
 
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    printf("recive1\n");
 
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    return NULL;
 
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}
 
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void *tfunc2(void *attr) {
 
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    pthread_mutex_lock(&mutex);
 
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    printf("locked2\n");
 
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    sleep(3);
 
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    printf("wait2 finished\n");
 
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    pthread_cond_wait(&cond,&mutex);
 
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    pthread_mutex_unlock(&mutex);
 
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    printf("recive2\n");
 
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    return NULL;
 
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}
 
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void *tfunc3(void *attr) {
 
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    sleep(1);
 
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    pthread_mutex_lock(&mutex);
 
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    printf("locked for send\n");
 
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    pthread_cond_broadcast(&cond);
 
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    printf("send\n");
 
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    pthread_mutex_unlock(&mutex);
 
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    printf("unlocked from send\n");
 
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    return NULL;
 
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}
 
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main() {
 
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    void *ret;
 
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    pthread_mutex_init(&mutex,NULL);
 
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    pthread_cond_init(&cond,NULL);
 
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    pthread_create(&thread1,NULL,tfunc1,NULL);
 
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    pthread_create(&thread2,NULL,tfunc2,NULL);
 
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    pthread_create(&thread3,NULL,tfunc3,NULL);
 
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    pthread_join(thread1,&ret);
 
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    pthread_join(thread2,&ret);
 
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    pthread_join(thread3,&ret);
 
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}