| // -*- C++ -*- |
| //===----------------------------------------------------------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef _LIBCPP___CHRONO_CONVERT_TO_TIMESPEC_H |
| #define _LIBCPP___CHRONO_CONVERT_TO_TIMESPEC_H |
| |
| #include <__chrono/duration.h> |
| #include <__config> |
| #include <limits> |
| |
| #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) |
| # pragma GCC system_header |
| #endif |
| |
| _LIBCPP_PUSH_MACROS |
| #include <__undef_macros> |
| |
| _LIBCPP_BEGIN_NAMESPACE_STD |
| |
| // Convert a nanoseconds duration to the given TimeSpec type, which must have |
| // the same properties as std::timespec. |
| template <class _TimeSpec> |
| _LIBCPP_HIDE_FROM_ABI inline |
| _TimeSpec __convert_to_timespec(const chrono::nanoseconds& __ns) |
| { |
| using namespace chrono; |
| seconds __s = duration_cast<seconds>(__ns); |
| _TimeSpec __ts; |
| typedef decltype(__ts.tv_sec) __ts_sec; |
| const __ts_sec __ts_sec_max = numeric_limits<__ts_sec>::max(); |
| |
| if (__s.count() < __ts_sec_max) |
| { |
| __ts.tv_sec = static_cast<__ts_sec>(__s.count()); |
| __ts.tv_nsec = static_cast<decltype(__ts.tv_nsec)>((__ns - __s).count()); |
| } |
| else |
| { |
| __ts.tv_sec = __ts_sec_max; |
| __ts.tv_nsec = 999999999; // (10^9 - 1) |
| } |
| |
| return __ts; |
| } |
| |
| _LIBCPP_END_NAMESPACE_STD |
| |
| _LIBCPP_POP_MACROS |
| |
| #endif // _LIBCPP___CHRONO_CONVERT_TO_TIMESPEC_H |