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
66 lines
1.4 KiB
C++
66 lines
1.4 KiB
C++
//===----------------------------------------------------------------------===//
|
|
//
|
|
// 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
|
|
|
|
// thread& operator=(thread&& t);
|
|
|
|
#include <thread>
|
|
#include <cassert>
|
|
|
|
class G
|
|
{
|
|
int alive_;
|
|
public:
|
|
static int n_alive;
|
|
static bool op_run;
|
|
|
|
G() : alive_(1) {++n_alive;}
|
|
G(const G& g) : alive_(g.alive_) {++n_alive;}
|
|
~G() {alive_ = 0; --n_alive;}
|
|
|
|
void operator()(int i, double j)
|
|
{
|
|
assert(alive_ == 1);
|
|
assert(n_alive >= 1);
|
|
assert(i == 5);
|
|
assert(j == 5.5);
|
|
op_run = true;
|
|
}
|
|
};
|
|
|
|
int G::n_alive = 0;
|
|
bool G::op_run = false;
|
|
|
|
int main()
|
|
{
|
|
#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
|
|
{
|
|
assert(G::n_alive == 0);
|
|
assert(!G::op_run);
|
|
{
|
|
G g;
|
|
std::thread t0(g, 5, 5.5);
|
|
std::thread::id id = t0.get_id();
|
|
std::thread t1;
|
|
t1 = std::move(t0);
|
|
assert(t1.get_id() == id);
|
|
assert(t0.get_id() == std::thread::id());
|
|
t1.join();
|
|
}
|
|
assert(G::n_alive == 0);
|
|
assert(G::op_run);
|
|
}
|
|
#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES
|
|
}
|