102 lines
2.3 KiB
C++
102 lines
2.3 KiB
C++
//===----------------------------------------------------------------------===//
|
|
//
|
|
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
|
|
// See https://llvm.org/LICENSE.txt for license information.
|
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// UNSUPPORTED: libcpp-has-no-threads
|
|
// UNSUPPORTED: c++03, c++11
|
|
|
|
// dylib support for shared_mutex was added in macosx10.12
|
|
// XFAIL: with_system_cxx_lib=macosx10.11
|
|
// XFAIL: with_system_cxx_lib=macosx10.10
|
|
// XFAIL: with_system_cxx_lib=macosx10.9
|
|
|
|
// ALLOW_RETRIES: 2
|
|
|
|
// <shared_mutex>
|
|
|
|
// template <class Mutex> class shared_lock;
|
|
|
|
// void lock();
|
|
|
|
#include <shared_mutex>
|
|
#include <thread>
|
|
#include <vector>
|
|
#include <cstdlib>
|
|
#include <cassert>
|
|
|
|
#include "make_test_thread.h"
|
|
#include "test_macros.h"
|
|
|
|
std::shared_timed_mutex m;
|
|
|
|
typedef std::chrono::system_clock Clock;
|
|
typedef Clock::time_point time_point;
|
|
typedef Clock::duration duration;
|
|
typedef std::chrono::milliseconds ms;
|
|
typedef std::chrono::nanoseconds ns;
|
|
|
|
ms WaitTime = ms(250);
|
|
|
|
// Thread sanitizer causes more overhead and will sometimes cause this test
|
|
// to fail. To prevent this we give Thread sanitizer more time to complete the
|
|
// test.
|
|
#if !defined(TEST_HAS_SANITIZERS)
|
|
ms Tolerance = ms(25);
|
|
#else
|
|
ms Tolerance = ms(25 * 5);
|
|
#endif
|
|
|
|
|
|
void f()
|
|
{
|
|
std::shared_lock<std::shared_timed_mutex> lk(m, std::defer_lock);
|
|
time_point t0 = Clock::now();
|
|
lk.lock();
|
|
time_point t1 = Clock::now();
|
|
assert(lk.owns_lock() == true);
|
|
ns d = t1 - t0 - WaitTime;
|
|
assert(d < Tolerance); // within tolerance
|
|
#ifndef TEST_HAS_NO_EXCEPTIONS
|
|
try
|
|
{
|
|
lk.lock();
|
|
assert(false);
|
|
}
|
|
catch (std::system_error& e)
|
|
{
|
|
assert(e.code().value() == EDEADLK);
|
|
}
|
|
#endif
|
|
lk.unlock();
|
|
lk.release();
|
|
#ifndef TEST_HAS_NO_EXCEPTIONS
|
|
try
|
|
{
|
|
lk.lock();
|
|
assert(false);
|
|
}
|
|
catch (std::system_error& e)
|
|
{
|
|
assert(e.code().value() == EPERM);
|
|
}
|
|
#endif
|
|
}
|
|
|
|
int main(int, char**)
|
|
{
|
|
m.lock();
|
|
std::vector<std::thread> v;
|
|
for (int i = 0; i < 5; ++i)
|
|
v.push_back(support::make_test_thread(f));
|
|
std::this_thread::sleep_for(WaitTime);
|
|
m.unlock();
|
|
for (auto& t : v)
|
|
t.join();
|
|
|
|
return 0;
|
|
}
|