Tibor Nagy
31 lines
637 B
C
31 lines
637 B
C
#include <stdio.h>
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#include <stdlib.h>
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#include "test_helpers.h"
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int main(void) {
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FILE *f = fopen("stdio/stdio.in", "r");
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ERROR_IF(fopen, f, == NULL);
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flockfile(f);
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// Commenting this out should cause a deadlock:
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// flockfile(f);
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if (!ftrylockfile(f)) {
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puts("Mutex unlocked but it shouldn't be");
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exit(EXIT_FAILURE);
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}
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funlockfile(f);
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if (ftrylockfile(f)) {
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puts("Mutex locked but it shouldn't be");
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exit(EXIT_FAILURE);
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}
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if (!ftrylockfile(f)) {
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puts("Mutex unlocked but it shouldn't be");
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exit(EXIT_FAILURE);
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}
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funlockfile(f);
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}
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