106c3fb27SDimitry Andric //===----------------------------------------------------------------------===// 206c3fb27SDimitry Andric // 306c3fb27SDimitry Andric // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 406c3fb27SDimitry Andric // See https://llvm.org/LICENSE.txt for license information. 506c3fb27SDimitry Andric // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 606c3fb27SDimitry Andric // 706c3fb27SDimitry Andric //===----------------------------------------------------------------------===// 806c3fb27SDimitry Andric 906c3fb27SDimitry Andric #ifndef _LIBCPP___MUTEX_MUTEX_H 1006c3fb27SDimitry Andric #define _LIBCPP___MUTEX_MUTEX_H 1106c3fb27SDimitry Andric 1206c3fb27SDimitry Andric #include <__config> 13*0fca6ea1SDimitry Andric #include <__thread/support.h> 14*0fca6ea1SDimitry Andric #include <__type_traits/is_nothrow_constructible.h> 1506c3fb27SDimitry Andric 1606c3fb27SDimitry Andric #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 1706c3fb27SDimitry Andric # pragma GCC system_header 1806c3fb27SDimitry Andric #endif 1906c3fb27SDimitry Andric 2006c3fb27SDimitry Andric #ifndef _LIBCPP_HAS_NO_THREADS 2106c3fb27SDimitry Andric 2206c3fb27SDimitry Andric _LIBCPP_BEGIN_NAMESPACE_STD 2306c3fb27SDimitry Andric 2406c3fb27SDimitry Andric class _LIBCPP_EXPORTED_FROM_ABI _LIBCPP_THREAD_SAFETY_ANNOTATION(capability("mutex")) mutex { 2506c3fb27SDimitry Andric __libcpp_mutex_t __m_ = _LIBCPP_MUTEX_INITIALIZER; 2606c3fb27SDimitry Andric 2706c3fb27SDimitry Andric public: 2806c3fb27SDimitry Andric _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR mutex() = default; 2906c3fb27SDimitry Andric 3006c3fb27SDimitry Andric mutex(const mutex&) = delete; 3106c3fb27SDimitry Andric mutex& operator=(const mutex&) = delete; 3206c3fb27SDimitry Andric 3306c3fb27SDimitry Andric # if defined(_LIBCPP_HAS_TRIVIAL_MUTEX_DESTRUCTION) 3406c3fb27SDimitry Andric _LIBCPP_HIDE_FROM_ABI ~mutex() = default; 3506c3fb27SDimitry Andric # else 3606c3fb27SDimitry Andric ~mutex() _NOEXCEPT; 3706c3fb27SDimitry Andric # endif 3806c3fb27SDimitry Andric 3906c3fb27SDimitry Andric void lock() _LIBCPP_THREAD_SAFETY_ANNOTATION(acquire_capability()); 4006c3fb27SDimitry Andric bool try_lock() _NOEXCEPT _LIBCPP_THREAD_SAFETY_ANNOTATION(try_acquire_capability(true)); 4106c3fb27SDimitry Andric void unlock() _NOEXCEPT _LIBCPP_THREAD_SAFETY_ANNOTATION(release_capability()); 4206c3fb27SDimitry Andric 4306c3fb27SDimitry Andric typedef __libcpp_mutex_t* native_handle_type; 4406c3fb27SDimitry Andric _LIBCPP_HIDE_FROM_ABI native_handle_type native_handle() { return &__m_; } 4506c3fb27SDimitry Andric }; 4606c3fb27SDimitry Andric 4706c3fb27SDimitry Andric static_assert(is_nothrow_default_constructible<mutex>::value, "the default constructor for std::mutex must be nothrow"); 4806c3fb27SDimitry Andric 4906c3fb27SDimitry Andric _LIBCPP_END_NAMESPACE_STD 5006c3fb27SDimitry Andric 5106c3fb27SDimitry Andric #endif // _LIBCPP_HAS_NO_THREADS 5206c3fb27SDimitry Andric 5306c3fb27SDimitry Andric #endif // _LIBCPP___MUTEX_MUTEX_H 54