6be02cb83f
The test class 'G' reads and writes to the same static variables in its constructor, destructor and call operator. When threads are constructed using `std::thread t((G()))` there is a race condition between the destruction of the temporary and the execution of `G::operator()()`. The fix is to simply create the input before creating the thread. git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@233946 91177308-0d34-0410-b5e6-96231b3b80d8
55 lines
1.0 KiB
C++
55 lines
1.0 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is dual licensed under the MIT and the University of Illinois Open
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// Source Licenses. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// UNSUPPORTED: libcpp-has-no-threads
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// <thread>
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// class thread
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// bool joinable() const;
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#include <thread>
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#include <new>
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#include <cstdlib>
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#include <cassert>
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class G
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{
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int alive_;
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public:
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static int n_alive;
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static bool op_run;
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G() : alive_(1) {++n_alive;}
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G(const G& g) : alive_(g.alive_) {++n_alive;}
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~G() {alive_ = 0; --n_alive;}
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void operator()()
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{
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assert(alive_ == 1);
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assert(n_alive >= 1);
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op_run = true;
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}
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};
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int G::n_alive = 0;
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bool G::op_run = false;
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int main()
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{
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{
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G g;
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std::thread t0(g);
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assert(t0.joinable());
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t0.join();
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assert(!t0.joinable());
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}
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}
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