| // 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 |