1 //===----------------------------------------------------------------------===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 #ifndef _LIBCPP___MUTEX_TAG_TYPES_H 10 #define _LIBCPP___MUTEX_TAG_TYPES_H 11 12 #include <__config> 13 14 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 15 # pragma GCC system_header 16 #endif 17 18 #ifndef _LIBCPP_HAS_NO_THREADS 19 20 _LIBCPP_BEGIN_NAMESPACE_STD 21 22 struct _LIBCPP_EXPORTED_FROM_ABI defer_lock_t { 23 explicit defer_lock_t() = default; 24 }; 25 26 struct _LIBCPP_EXPORTED_FROM_ABI try_to_lock_t { 27 explicit try_to_lock_t() = default; 28 }; 29 30 struct _LIBCPP_EXPORTED_FROM_ABI adopt_lock_t { 31 explicit adopt_lock_t() = default; 32 }; 33 34 # if _LIBCPP_STD_VER >= 17 35 inline constexpr defer_lock_t defer_lock = defer_lock_t(); 36 inline constexpr try_to_lock_t try_to_lock = try_to_lock_t(); 37 inline constexpr adopt_lock_t adopt_lock = adopt_lock_t(); 38 # elif !defined(_LIBCPP_CXX03_LANG) 39 constexpr defer_lock_t defer_lock = defer_lock_t(); 40 constexpr try_to_lock_t try_to_lock = try_to_lock_t(); 41 constexpr adopt_lock_t adopt_lock = adopt_lock_t(); 42 # endif 43 44 _LIBCPP_END_NAMESPACE_STD 45 46 #endif // _LIBCPP_HAS_NO_THREADS 47 48 #endif // _LIBCPP___MUTEX_TAG_TYPES_H 49