e9d5842ac7
This is a follow up to https://github.com/llvm/llvm-project/pull/98717, which made lock_guard available under _LIBCPP_HAS_NO_THREADS. We can make unique_lock available under similar circumstances. This patch follows the example in #98717, by: - Removing the preprocessor guards for _LIBCPP_HAS_NO_THREADS in the unique_lock header. - providing a set of custom mutex implementations in a local header. - using custom locks in tests that can be made to work under `no-threads`.
40 lines
1.0 KiB
C++
40 lines
1.0 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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// <mutex>
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// template <class Mutex> class unique_lock;
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// mutex_type* release() noexcept;
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#include <cassert>
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#include <mutex>
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#include "test_macros.h"
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#include "../types.h"
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int MyCountingMutex::lock_count = 0;
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int MyCountingMutex::unlock_count = 0;
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MyCountingMutex m;
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int main(int, char**) {
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std::unique_lock<MyCountingMutex> lk(m);
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assert(lk.mutex() == &m);
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assert(lk.owns_lock() == true);
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assert(MyCountingMutex::lock_count == 1);
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assert(MyCountingMutex::unlock_count == 0);
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assert(lk.release() == &m);
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assert(lk.mutex() == nullptr);
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assert(lk.owns_lock() == false);
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assert(MyCountingMutex::lock_count == 1);
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assert(MyCountingMutex::unlock_count == 0);
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return 0;
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}
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