37 lines
831 B
C
37 lines
831 B
C
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#include <pthread.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <errno.h>
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#include <string.h>
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int main(void) {
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int err;
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struct timespec tout;
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struct tm *tmp;
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char buf[64];
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pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER;
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pthread_mutex_lock(&lock);
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printf("mutex is locked\n");
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clock_gettime(CLOCK_REALTIME, &tout);
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tmp = localtime(&tout.tv_sec);
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strftime(buf, sizeof(buf), "%r", tmp);
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printf("current time is %s\n", buf);
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tout.tv_sec += 10;
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err = pthread_mutex_timedlock(&lock, &tout);
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clock_gettime(CLOCK_REALTIME, &tout);
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tmp = localtime(&tout.tv_sec);
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strftime(buf, sizeof(buf), "%r", tmp);
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printf("the time is now %s\n", buf);
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if(err == 0)
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printf("mutex locked again!n");
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else
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printf("can't lock mutex again: %s\n", strerror(err));
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return 0;
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}
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