forked from OSchip/llvm-project
74 lines
1.3 KiB
C++
74 lines
1.3 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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// void detach();
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#include <thread>
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#include <atomic>
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#include <cassert>
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std::atomic_bool done = ATOMIC_VAR_INIT(false);
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class G
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{
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int alive_;
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bool done_;
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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), done_(false)
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{
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++n_alive;
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}
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G(const G& g) : alive_(g.alive_), done_(false)
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{
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++n_alive;
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}
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~G()
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{
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alive_ = 0;
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--n_alive;
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if (done_) done = true;
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}
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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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done_ = 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.detach();
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assert(!t0.joinable());
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while (!done) {}
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assert(G::op_run);
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assert(G::n_alive == 1);
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}
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assert(G::n_alive == 0);
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}
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