StudyingUnixInterface/11/pthread/thread_clean.c

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2021-01-11 10:00:36 +00:00
#include <pthread.h>
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
void cleanup(void *arg) {
printf("cleanup: %s\n", (char *) arg);
}
void *thr_fn1(void *arg) {
printf("thread 1 start\n");
pthread_cleanup_push(cleanup, (void *)"thread 1 first handler");
pthread_cleanup_push(cleanup, (void *)"thread 1 second handler");
printf("thread 1 push complete\n");
if(arg) {
return (void *)1;
}
pthread_cleanup_pop(0);
pthread_cleanup_pop(0);
return (void *)1;
}
void *thr_fn2(void *arg) {
printf("thread 2 start\n");
pthread_cleanup_push(cleanup, (void *)"thread 2 first handler");
pthread_cleanup_push(cleanup, (void *)"thread 2 second handler");
printf("thread 2 push complete\n");
if(arg) {
pthread_exit((void *)2);
}
pthread_cleanup_pop(0);
pthread_cleanup_pop(0);
pthread_exit((void *)2);
}
int main(void) {
int err;
pthread_t tid1, tid2;
void *tret;
err = pthread_create(&tid1, NULL, thr_fn1, (void *)1);
if(err != 0) {
printf("thread 1 create error\n");
return -1;
}
err = pthread_create(&tid2, NULL, thr_fn2, (void *)1);
if(err != 0) {
printf("thread 2 create error\n");
return -1;
}
err = pthread_join(tid1, &tret);
if(err != 0) {
printf("thread 1 join error\n");
return -1;
}
printf("thread 1 exit code %ld\n", (long)tret);
err = pthread_join(tid2, &tret);
if(err != 0) {
printf("thread 2 join error\n");
return -1;
}
printf("thread 2 exit code %ld\n", (long)tret);
return 0;
}