forked from rpms/glibc
47 lines
871 B
C
47 lines
871 B
C
#include <pthread.h>
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#include <stdio.h>
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FILE *fp;
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pthread_mutex_t mutech = PTHREAD_MUTEX_INITIALIZER;
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pthread_cond_t cond = PTHREAD_COND_INITIALIZER;
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int counter = 0;
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void *one(void *arg){
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pthread_mutex_lock(&mutech);
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while (counter == 0)
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pthread_cond_wait(&cond, &mutech);
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counter = 2;
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fprintf(fp, "Thread 1 run\n");
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pthread_mutex_unlock(&mutech);
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pthread_cond_signal(&cond);
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}
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void *two(void *arg){
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pthread_mutex_lock(&mutech);
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while(counter == 1)
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pthread_cond_wait(&cond, &mutech);
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counter = 1;
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fprintf(fp, "Thread 2 run\n");
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pthread_mutex_unlock(&mutech);
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pthread_cond_signal(&cond);
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}
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int main(){
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fp = fopen("lpthread.out", "w");
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pthread_t on;
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pthread_t tw;
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pthread_create(&on, NULL, one, NULL);
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pthread_create(&tw, NULL, two, NULL);
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pthread_join(tw, NULL);
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pthread_join(on, NULL);
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close(fp);
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return 0;
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}
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