104eeddc0SDimitry Andric // -*- C++ -*- 204eeddc0SDimitry Andric //===----------------------------------------------------------------------===// 304eeddc0SDimitry Andric // 404eeddc0SDimitry Andric // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 504eeddc0SDimitry Andric // See https://llvm.org/LICENSE.txt for license information. 604eeddc0SDimitry Andric // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 704eeddc0SDimitry Andric // 804eeddc0SDimitry Andric //===----------------------------------------------------------------------===// 9bdd1243dSDimitry Andric 1004eeddc0SDimitry Andric #ifndef _LIBCPP___CHRONO_CONVERT_TO_TIMESPEC_H 1104eeddc0SDimitry Andric #define _LIBCPP___CHRONO_CONVERT_TO_TIMESPEC_H 1204eeddc0SDimitry Andric 1304eeddc0SDimitry Andric #include <__chrono/duration.h> 1404eeddc0SDimitry Andric #include <__config> 1504eeddc0SDimitry Andric #include <limits> 1604eeddc0SDimitry Andric 1704eeddc0SDimitry Andric #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 1804eeddc0SDimitry Andric # pragma GCC system_header 1904eeddc0SDimitry Andric #endif 2004eeddc0SDimitry Andric 2104eeddc0SDimitry Andric _LIBCPP_PUSH_MACROS 2204eeddc0SDimitry Andric #include <__undef_macros> 2304eeddc0SDimitry Andric 2404eeddc0SDimitry Andric _LIBCPP_BEGIN_NAMESPACE_STD 2504eeddc0SDimitry Andric 2604eeddc0SDimitry Andric // Convert a nanoseconds duration to the given TimeSpec type, which must have 2704eeddc0SDimitry Andric // the same properties as std::timespec. 2804eeddc0SDimitry Andric template <class _TimeSpec> __convert_to_timespec(const chrono::nanoseconds & __ns)29*cb14a3feSDimitry Andric_LIBCPP_HIDE_FROM_ABI inline _TimeSpec __convert_to_timespec(const chrono::nanoseconds& __ns) { 3004eeddc0SDimitry Andric using namespace chrono; 3104eeddc0SDimitry Andric seconds __s = duration_cast<seconds>(__ns); 3204eeddc0SDimitry Andric _TimeSpec __ts; 3304eeddc0SDimitry Andric typedef decltype(__ts.tv_sec) __ts_sec; 3404eeddc0SDimitry Andric const __ts_sec __ts_sec_max = numeric_limits<__ts_sec>::max(); 3504eeddc0SDimitry Andric 36*cb14a3feSDimitry Andric if (__s.count() < __ts_sec_max) { 3704eeddc0SDimitry Andric __ts.tv_sec = static_cast<__ts_sec>(__s.count()); 3804eeddc0SDimitry Andric __ts.tv_nsec = static_cast<decltype(__ts.tv_nsec)>((__ns - __s).count()); 39*cb14a3feSDimitry Andric } else { 4004eeddc0SDimitry Andric __ts.tv_sec = __ts_sec_max; 4104eeddc0SDimitry Andric __ts.tv_nsec = 999999999; // (10^9 - 1) 4204eeddc0SDimitry Andric } 4304eeddc0SDimitry Andric 4404eeddc0SDimitry Andric return __ts; 4504eeddc0SDimitry Andric } 4604eeddc0SDimitry Andric 4704eeddc0SDimitry Andric _LIBCPP_END_NAMESPACE_STD 4804eeddc0SDimitry Andric 4904eeddc0SDimitry Andric _LIBCPP_POP_MACROS 5004eeddc0SDimitry Andric 5104eeddc0SDimitry Andric #endif // _LIBCPP___CHRONO_CONVERT_TO_TIMESPEC_H 52