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//===----------------------------------------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// UNSUPPORTED: libcpp-has-no-threads
// <thread>
// class thread
// void detach();
#include <thread>
#include <atomic>
#include <cassert>
std::atomic_bool done(false);
class G
{
int alive_;
bool done_;
public:
static int n_alive;
static bool op_run;
G() : alive_(1), done_(false)
{
++n_alive;
}
G(const G& g) : alive_(g.alive_), done_(false)
{
++n_alive;
}
~G()
{
alive_ = 0;
--n_alive;
if (done_) done = true;
}
void operator()()
{
assert(alive_ == 1);
assert(n_alive >= 1);
op_run = true;
done_ = true;
}
};
int G::n_alive = 0;
bool G::op_run = false;
int main()
{
{
G g;
std::thread t0(g);
assert(t0.joinable());
t0.detach();
assert(!t0.joinable());
while (!done) {}
assert(G::op_run);
assert(G::n_alive == 1);
}
assert(G::n_alive == 0);
}
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