fa1c077b41
This patch removes the ability to build the runtimes in the 32 bit multilib configuration, i.e. using -m32. Instead of doing this, one should cross-compile the runtimes for the appropriate target triple, like we do for all other triples. As it stands, -m32 has several issues, which all seem to be related to the fact that it's not well supported by the operating systems that libc++ support. The simplest path towards fixing this is to remove support for the configuration, which is also the best course of action if there is little interest for keeping that configuration. If there is a desire to keep this configuration around, we'll need to do some work to figure out the underlying issues and fix them. Differential Revision: https://reviews.llvm.org/D114473
108 lines
2.6 KiB
C++
108 lines
2.6 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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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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// UNSUPPORTED: c++03, c++11
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// ALLOW_RETRIES: 2
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// dylib support for shared_mutex was added in macosx10.12
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// XFAIL: use_system_cxx_lib && target={{.+}}-apple-macosx10.{{9|10|11}}
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// <shared_mutex>
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// template <class Mutex> class shared_lock;
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// explicit shared_lock(mutex_type& m);
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// template<class _Mutex> shared_lock(shared_lock<_Mutex>)
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// -> shared_lock<_Mutex>; // C++17
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#include <shared_mutex>
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#include <thread>
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#include <vector>
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#include <cstdlib>
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#include <cassert>
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#include "make_test_thread.h"
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#include "test_macros.h"
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typedef std::chrono::system_clock Clock;
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typedef Clock::time_point time_point;
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typedef Clock::duration duration;
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typedef std::chrono::milliseconds ms;
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typedef std::chrono::nanoseconds ns;
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ms WaitTime = ms(250);
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// Thread sanitizer causes more overhead and will sometimes cause this test
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// to fail. To prevent this we give Thread sanitizer more time to complete the
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// test.
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#if !defined(TEST_HAS_SANITIZERS)
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ms Tolerance = ms(50);
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#else
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ms Tolerance = ms(50 * 5);
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#endif
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std::shared_timed_mutex m;
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void f()
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{
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time_point t0 = Clock::now();
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time_point t1;
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{
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std::shared_lock<std::shared_timed_mutex> ul(m);
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t1 = Clock::now();
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}
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ns d = t1 - t0 - WaitTime;
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assert(d < Tolerance); // within tolerance
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}
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void g()
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{
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time_point t0 = Clock::now();
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time_point t1;
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{
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std::shared_lock<std::shared_timed_mutex> ul(m);
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t1 = Clock::now();
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}
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ns d = t1 - t0;
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assert(d < Tolerance); // within tolerance
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}
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int main(int, char**)
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{
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std::vector<std::thread> v;
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{
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m.lock();
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for (int i = 0; i < 5; ++i)
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v.push_back(support::make_test_thread(f));
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std::this_thread::sleep_for(WaitTime);
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m.unlock();
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for (auto& t : v)
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t.join();
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}
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{
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m.lock_shared();
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for (auto& t : v)
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t = support::make_test_thread(g);
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std::thread q = support::make_test_thread(f);
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std::this_thread::sleep_for(WaitTime);
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m.unlock_shared();
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for (auto& t : v)
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t.join();
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q.join();
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}
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#if TEST_STD_VER >= 17
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std::shared_lock sl(m);
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static_assert((std::is_same<decltype(sl), std::shared_lock<decltype(m)>>::value), "" );
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#endif
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return 0;
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}
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