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 // Define ~condition_variable. 10 // 11 // On some platforms ~condition_variable has been made trivial and the 12 // definition is only provided for ABI compatibility. 13 14 #include <__config> 15 #include <__threading_support> 16 17 #if _LIBCPP_ABI_VERSION == 1 || !defined(_LIBCPP_HAS_TRIVIAL_CONDVAR_DESTRUCTION) 18 # define NEEDS_CONDVAR_DESTRUCTOR 19 #endif 20 21 _LIBCPP_BEGIN_NAMESPACE_STD 22 23 #ifdef NEEDS_CONDVAR_DESTRUCTOR 24 25 class _LIBCPP_EXPORTED_FROM_ABI condition_variable 26 { 27 __libcpp_condvar_t __cv_ = _LIBCPP_CONDVAR_INITIALIZER; 28 public: 29 _LIBCPP_HIDE_FROM_ABI 30 constexpr condition_variable() noexcept = default; 31 32 ~condition_variable(); 33 34 condition_variable(const condition_variable&) = delete; 35 condition_variable& operator=(const condition_variable&) = delete; 36 }; 37 38 condition_variable::~condition_variable() 39 { 40 __libcpp_condvar_destroy(&__cv_); 41 } 42 #endif 43 44 _LIBCPP_END_NAMESPACE_STD 45