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// RUN: %clang_tsan %s -o %t
// RUN: %run %t 2>&1 | FileCheck %s --implicit-check-not='ThreadSanitizer'
#include <dispatch/dispatch.h>
#include "../test.h"
static const long kNumThreads = 4;
long global;
long global2;
static dispatch_once_t once_token;
static dispatch_once_t once_token2;
void f(void *a) {
global2 = 42;
usleep(100000);
}
void *Thread(void *a) {
barrier_wait(&barrier);
dispatch_once(&once_token, ^{
global = 42;
usleep(100000);
});
long x = global;
dispatch_once_f(&once_token2, NULL, f);
long x2 = global2;
fprintf(stderr, "global = %ld\n", x);
fprintf(stderr, "global2 = %ld\n", x2);
return 0;
}
int main() {
fprintf(stderr, "Hello world.\n");
barrier_init(&barrier, kNumThreads);
pthread_t t[kNumThreads];
for (int i = 0; i < kNumThreads; i++) {
pthread_create(&t[i], 0, Thread, 0);
}
for (int i = 0; i < kNumThreads; i++) {
pthread_join(t[i], 0);
}
fprintf(stderr, "Done.\n");
}
// CHECK: Hello world.
// CHECK: Done.
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