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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"
const size_t size = 2;
long global;
long array[size];
void callback(void *context, size_t i) {
long n = global;
array[i] = n + i;
barrier_wait(&barrier);
}
int main(int argc, const char *argv[]) {
fprintf(stderr, "start\n");
// Warm up GCD (workaround for macOS Sierra where dispatch_apply might run single-threaded).
dispatch_sync(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{ });
dispatch_queue_t q = dispatch_queue_create("my.queue", DISPATCH_QUEUE_CONCURRENT);
global = 42;
barrier_init(&barrier, size);
dispatch_apply(size, q, ^(size_t i) {
long n = global;
array[i] = n + i;
barrier_wait(&barrier);
});
for (size_t i = 0; i < size; i++) {
fprintf(stderr, "array[%ld] = %ld\n", i, array[i]);
}
global = 142;
barrier_init(&barrier, size);
dispatch_apply_f(size, q, NULL, &callback);
for (size_t i = 0; i < size; i++) {
fprintf(stderr, "array[%ld] = %ld\n", i, array[i]);
}
fprintf(stderr, "done\n");
return 0;
}
// CHECK: start
// CHECK: array[0] = 42
// CHECK: array[1] = 43
// CHECK: array[0] = 142
// CHECK: array[1] = 143
// CHECK: done
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