2 //===----------------------------------------------------------------------===//
4 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
5 // See https://llvm.org/LICENSE.txt for license information.
6 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
8 //===----------------------------------------------------------------------===//
34 double difftime(time_t time1, time_t time0);
35 time_t mktime(tm* timeptr);
36 time_t time(time_t* timer);
37 char* asctime(const tm* timeptr);
38 char* ctime(const time_t* timer);
39 tm* gmtime(const time_t* timer);
40 tm* localtime(const time_t* timer);
41 size_t strftime(char* restrict s, size_t maxsize, const char* restrict format,
42 const tm* restrict timeptr);
43 int timespec_get( struct timespec *ts, int base); // C++17
49 #include <__cstddef/size_t.h>
51 // <time.h> is not provided by libc++
52 #if __has_include(<time.h>)
54 # ifdef _LIBCPP_TIME_H
55 # error "If libc++ starts defining <time.h>, the __has_include check should move to libc++'s <time.h>"
59 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
60 # pragma GCC system_header
63 _LIBCPP_BEGIN_NAMESPACE_STD
65 using ::clock_t _LIBCPP_USING_IF_EXISTS;
66 using ::time_t _LIBCPP_USING_IF_EXISTS;
67 using ::tm _LIBCPP_USING_IF_EXISTS;
68 #if _LIBCPP_STD_VER >= 17
69 using ::timespec _LIBCPP_USING_IF_EXISTS;
71 using ::clock _LIBCPP_USING_IF_EXISTS;
72 using ::difftime _LIBCPP_USING_IF_EXISTS;
73 using ::mktime _LIBCPP_USING_IF_EXISTS;
74 using ::time _LIBCPP_USING_IF_EXISTS;
75 using ::asctime _LIBCPP_USING_IF_EXISTS;
76 using ::ctime _LIBCPP_USING_IF_EXISTS;
77 using ::gmtime _LIBCPP_USING_IF_EXISTS;
78 using ::localtime _LIBCPP_USING_IF_EXISTS;
79 using ::strftime _LIBCPP_USING_IF_EXISTS;
80 #if _LIBCPP_STD_VER >= 17
81 using ::timespec_get _LIBCPP_USING_IF_EXISTS;
84 _LIBCPP_END_NAMESPACE_STD
86 #endif // _LIBCPP_CTIME