James Y Knight c3656afdf1
Revert "[libc++] Introduce ABI sensitive areas to avoid requiring _LIBCPP_HIDE_FROM_ABI everywhere (#131156)" (#141756)
This reverts commit c861fe8a71e64f3d2108c58147e7375cd9314521.

Unfortunately, this use of hidden visibility attributes causes
user-defined specializations of standard-library types to also be marked
hidden by default, which is incorrect. See discussion thread on #131156.

...and also reverts the follow-up commits:

Revert "[libc++] Add explicit ABI annotations to functions from the block runtime declared in <__functional/function.h> (#140592)"
This reverts commit 3e4c9dc299c35155934688184319d391b298fff7.

Revert "[libc++] Make ABI annotations explicit for windows-specific code (#140507)"
This reverts commit f73287e623a6c2e4a3485832bc3e10860cd26eb5.

Revert "[libc++][NFC] Replace a few "namespace std" with the correct macro (#140510)"
This reverts commit 1d411f27c769a32cb22ce50b9dc4421e34fd40dd.
2025-05-28 12:04:51 -04:00

53 lines
1.4 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___CHRONO_SYSTEM_CLOCK_H
#define _LIBCPP___CHRONO_SYSTEM_CLOCK_H
#include <__chrono/duration.h>
#include <__chrono/time_point.h>
#include <__config>
#include <ctime>
#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
# pragma GCC system_header
#endif
_LIBCPP_BEGIN_NAMESPACE_STD
namespace chrono {
class _LIBCPP_EXPORTED_FROM_ABI system_clock {
public:
typedef microseconds duration;
typedef duration::rep rep;
typedef duration::period period;
typedef chrono::time_point<system_clock> time_point;
static _LIBCPP_CONSTEXPR_SINCE_CXX14 const bool is_steady = false;
static time_point now() _NOEXCEPT;
static time_t to_time_t(const time_point& __t) _NOEXCEPT;
static time_point from_time_t(time_t __t) _NOEXCEPT;
};
#if _LIBCPP_STD_VER >= 20
template <class _Duration>
using sys_time = time_point<system_clock, _Duration>;
using sys_seconds = sys_time<seconds>;
using sys_days = sys_time<days>;
#endif
} // namespace chrono
_LIBCPP_END_NAMESPACE_STD
#endif // _LIBCPP___CHRONO_SYSTEM_CLOCK_H