21f73d5826
Instead of carrying around #ifdefs to determine whether those functions are available on the platform, unconditionally use the using_if_exists attribute to import it into namespace std only when available. That was the purpose of this attribute from the start. This change means that trying to use libc++ with an old SDK (or on an old platform for platforms that ship system headers in /usr/include) will require a recent Clang that supports the using_if_exists attribute. When using an older Clang or GCC, the underlying platform has to support a C11 standard library. Differential Revision: https://reviews.llvm.org/D108203
80 lines
1.9 KiB
C++
80 lines
1.9 KiB
C++
// -*- 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_CTIME
|
|
#define _LIBCPP_CTIME
|
|
|
|
/*
|
|
ctime synopsis
|
|
|
|
Macros:
|
|
|
|
NULL
|
|
CLOCKS_PER_SEC
|
|
TIME_UTC // C++17
|
|
|
|
namespace std
|
|
{
|
|
|
|
Types:
|
|
|
|
clock_t
|
|
size_t
|
|
time_t
|
|
tm
|
|
timespec // C++17
|
|
|
|
clock_t clock();
|
|
double difftime(time_t time1, time_t time0);
|
|
time_t mktime(tm* timeptr);
|
|
time_t time(time_t* timer);
|
|
char* asctime(const tm* timeptr);
|
|
char* ctime(const time_t* timer);
|
|
tm* gmtime(const time_t* timer);
|
|
tm* localtime(const time_t* timer);
|
|
size_t strftime(char* restrict s, size_t maxsize, const char* restrict format,
|
|
const tm* restrict timeptr);
|
|
int timespec_get( struct timespec *ts, int base); // C++17
|
|
} // std
|
|
|
|
*/
|
|
|
|
#include <__config>
|
|
#include <time.h>
|
|
|
|
#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
|
|
# pragma GCC system_header
|
|
#endif
|
|
|
|
_LIBCPP_BEGIN_NAMESPACE_STD
|
|
|
|
using ::clock_t _LIBCPP_USING_IF_EXISTS;
|
|
using ::size_t _LIBCPP_USING_IF_EXISTS;
|
|
using ::time_t _LIBCPP_USING_IF_EXISTS;
|
|
using ::tm _LIBCPP_USING_IF_EXISTS;
|
|
#if _LIBCPP_STD_VER > 14
|
|
using ::timespec _LIBCPP_USING_IF_EXISTS;
|
|
#endif
|
|
using ::clock _LIBCPP_USING_IF_EXISTS;
|
|
using ::difftime _LIBCPP_USING_IF_EXISTS;
|
|
using ::mktime _LIBCPP_USING_IF_EXISTS;
|
|
using ::time _LIBCPP_USING_IF_EXISTS;
|
|
using ::asctime _LIBCPP_USING_IF_EXISTS;
|
|
using ::ctime _LIBCPP_USING_IF_EXISTS;
|
|
using ::gmtime _LIBCPP_USING_IF_EXISTS;
|
|
using ::localtime _LIBCPP_USING_IF_EXISTS;
|
|
using ::strftime _LIBCPP_USING_IF_EXISTS;
|
|
#if _LIBCPP_STD_VER > 14
|
|
using ::timespec_get _LIBCPP_USING_IF_EXISTS;
|
|
#endif
|
|
|
|
_LIBCPP_END_NAMESPACE_STD
|
|
|
|
#endif // _LIBCPP_CTIME
|