47 lines
1.1 KiB
C++
47 lines
1.1 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is dual licensed under the MIT and the University of Illinois Open
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// Source Licenses. See LICENSE.TXT for details.
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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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// <mutex>
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// template <class Mutex> class unique_lock;
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// mutex_type* release() noexcept;
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#include <mutex>
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#include <cassert>
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struct mutex
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{
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static int lock_count;
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static int unlock_count;
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void lock() {++lock_count;}
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void unlock() {++unlock_count;}
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};
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int mutex::lock_count = 0;
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int mutex::unlock_count = 0;
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mutex m;
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int main()
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{
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std::unique_lock<mutex> lk(m);
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assert(lk.mutex() == &m);
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assert(lk.owns_lock() == true);
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assert(mutex::lock_count == 1);
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assert(mutex::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(mutex::lock_count == 1);
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assert(mutex::unlock_count == 0);
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}
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