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49 lines
725 B
49 lines
725 B
// RUN: %clangxx_tsan %s -o %t -framework Foundation -std=c++11
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// RUN: %run %t 2>&1 | FileCheck %s
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#import <Foundation/Foundation.h>
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#import <libkern/OSAtomic.h>
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#include <thread>
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volatile int64_t retainCount = 0;
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long g = 0;
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void dealloc() {
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g = 42;
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}
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void release() {
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if (OSAtomicAdd64Barrier(-1, &retainCount) == 0) {
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dealloc();
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}
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}
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void retain() {
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OSAtomicAdd64Barrier(1, &retainCount);
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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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retain();
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retain();
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std::thread t([]{
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release();
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});
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g = 47;
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release();
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t.join();
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fprintf(stderr, "end, g = %ld\n", g);
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return 0;
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}
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// CHECK: start
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// CHECK: end, g = 42
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// CHECK-NOT: WARNING: ThreadSanitizer
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