52 lines
1023 B
C
52 lines
1023 B
C
#include <stdio.h>
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#include <stdlib.h>
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#include <pthread.h>
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#include <unistd.h>
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#include <errno.h>
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#include <sys/time.h>
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pthread_rwlock_t rwlock;
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#define TIMEVAL_TO_TIMESPEC(tv, ts) { \
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(ts)->tv_sec = (tv)->tv_sec; \
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(ts)->tv_nsec = (tv)->tv_usec * 1000; \
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}
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void * func()
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{
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int ret = 0;
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struct timeval tv;
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struct timespec ts;
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(void)gettimeofday(&tv, NULL);
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TIMEVAL_TO_TIMESPEC(&tv, &ts);
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ts.tv_sec = -1;
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ret = pthread_rwlock_timedwrlock(&rwlock, &ts);
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if (ret == ETIMEDOUT) {
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printf("pthread_rwlock_timedwrlock:TIME OUT.\n");
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pthread_exit(0);
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} else if (ret == EINVAL) {
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printf("pthread_rwlock_timedwrlock:INVALID ARG.\n");
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pthread_exit(0);
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}
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printf("pthread_rwlock_timedwrlock:return = %d\n", ret);
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pthread_exit(0);
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}
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int main(int argv, char *argc[])
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{
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pthread_t tid;
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if (pthread_rwlock_init(&rwlock, NULL) != 0) {
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printf("pthread_rwlock_init error\n");
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exit(-1);
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}
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pthread_rwlock_wrlock(&rwlock);
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pthread_create(&tid, NULL, func, NULL);
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pthread_join(tid, NULL);
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return 0;
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}
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