kaguya
36 lines
651 B
C
36 lines
651 B
C
#include <assert.h>
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#include <time.h>
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#include <pthread.h>
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#include <stdio.h>
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#include <unistd.h>
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static void *worker(void *arg) {
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(void)arg;
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flockfile(stdout);
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fputs_unlocked("hello from worker", stdout);
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funlockfile(stdout);
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return NULL;
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}
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int main() {
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// Check that recursive locking works.
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assert(!ftrylockfile(stdout));
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flockfile(stdout);
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flockfile(stdout);
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funlockfile(stdout);
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funlockfile(stdout);
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funlockfile(stdout);
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assert(!ftrylockfile(stdout));
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pthread_t thread;
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int ret = pthread_create(&thread, NULL, &worker, NULL);
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assert(!ret);
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sleep(1);
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funlockfile(stdout);
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assert(!pthread_join(thread, NULL));
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return 0;
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}
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