forked from OSchip/llvm-project
58 lines
1.3 KiB
C
58 lines
1.3 KiB
C
// RUN: %clang_tsan %s -o %t
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// RUN: %run %t 2>&1 | FileCheck %s --implicit-check-not='ThreadSanitizer'
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#include <dispatch/dispatch.h>
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#include "../test.h"
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const size_t size = 2;
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long global;
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long array[size];
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void callback(void *context, size_t i) {
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long n = global;
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array[i] = n + i;
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barrier_wait(&barrier);
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}
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int main(int argc, const char *argv[]) {
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fprintf(stderr, "start\n");
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// Warm up GCD (workaround for macOS Sierra where dispatch_apply might run single-threaded).
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dispatch_sync(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{ });
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dispatch_queue_t q = dispatch_queue_create("my.queue", DISPATCH_QUEUE_CONCURRENT);
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global = 42;
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barrier_init(&barrier, size);
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dispatch_apply(size, q, ^(size_t i) {
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long n = global;
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array[i] = n + i;
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barrier_wait(&barrier);
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});
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for (size_t i = 0; i < size; i++) {
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fprintf(stderr, "array[%ld] = %ld\n", i, array[i]);
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}
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global = 142;
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barrier_init(&barrier, size);
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dispatch_apply_f(size, q, NULL, &callback);
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for (size_t i = 0; i < size; i++) {
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fprintf(stderr, "array[%ld] = %ld\n", i, array[i]);
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}
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fprintf(stderr, "done\n");
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return 0;
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}
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// CHECK: start
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// CHECK: array[0] = 42
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// CHECK: array[1] = 43
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// CHECK: array[0] = 142
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// CHECK: array[1] = 143
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// CHECK: done
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