forked from OSchip/llvm-project
54 lines
1.0 KiB
C
54 lines
1.0 KiB
C
// RUN: %clang_tsan -O1 %s -o %t && %t 2>&1 | FileCheck %s
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// CHECK-NOT: WARNING: ThreadSanitizer: data race
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// CHECK-NOT: ThreadSanitizer WARNING: double lock
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// CHECK-NOT: ThreadSanitizer WARNING: mutex unlock by another thread
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// CHECK: OK
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#include <stdio.h>
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#include <stdlib.h>
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#include <pthread.h>
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pthread_mutex_t m;
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pthread_cond_t c;
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int x;
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void *thr1(void *p) {
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int i;
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for (i = 0; i < 10; i += 2) {
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pthread_mutex_lock(&m);
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while (x != i)
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pthread_cond_wait(&c, &m);
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x = i + 1;
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pthread_cond_signal(&c);
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pthread_mutex_unlock(&m);
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}
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return 0;
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}
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void *thr2(void *p) {
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int i;
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for (i = 1; i < 10; i += 2) {
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pthread_mutex_lock(&m);
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while (x != i)
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pthread_cond_wait(&c, &m);
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x = i + 1;
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pthread_mutex_unlock(&m);
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pthread_cond_broadcast(&c);
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}
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return 0;
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}
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int main() {
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pthread_t th1, th2;
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pthread_mutex_init(&m, 0);
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pthread_cond_init(&c, 0);
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pthread_create(&th1, 0, thr1, 0);
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pthread_create(&th2, 0, thr2, 0);
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pthread_join(th1, 0);
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pthread_join(th2, 0);
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fprintf(stderr, "OK\n");
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}
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