2010-05-12 03:42:16 +08:00
|
|
|
// -*- C++ -*-
|
2021-11-18 05:25:01 +08:00
|
|
|
//===----------------------------------------------------------------------===//
|
2010-05-12 03:42:16 +08:00
|
|
|
//
|
2019-01-19 18:56:40 +08:00
|
|
|
// 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
|
2010-05-12 03:42:16 +08:00
|
|
|
//
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
|
|
|
|
#ifndef _LIBCPP_CSIGNAL
|
|
|
|
#define _LIBCPP_CSIGNAL
|
|
|
|
|
|
|
|
/*
|
|
|
|
csignal synopsis
|
|
|
|
|
|
|
|
Macros:
|
|
|
|
|
|
|
|
SIG_DFL
|
|
|
|
SIG_ERR
|
|
|
|
SIG_IGN
|
|
|
|
SIGABRT
|
|
|
|
SIGFPE
|
|
|
|
SIGILL
|
|
|
|
SIGINT
|
|
|
|
SIGSEGV
|
|
|
|
SIGTERM
|
2010-08-22 08:02:43 +08:00
|
|
|
|
2010-05-12 03:42:16 +08:00
|
|
|
namespace std
|
|
|
|
{
|
|
|
|
|
|
|
|
Types:
|
|
|
|
|
|
|
|
sig_atomic_t
|
|
|
|
|
|
|
|
void (*signal(int sig, void (*func)(int)))(int);
|
|
|
|
int raise(int sig);
|
|
|
|
|
|
|
|
} // std
|
|
|
|
|
|
|
|
*/
|
|
|
|
|
|
|
|
#include <__config>
|
|
|
|
#include <signal.h>
|
|
|
|
|
2011-10-18 04:05:10 +08:00
|
|
|
#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
|
2022-02-02 09:16:40 +08:00
|
|
|
# pragma GCC system_header
|
2011-10-18 04:05:10 +08:00
|
|
|
#endif
|
2010-05-12 03:42:16 +08:00
|
|
|
|
|
|
|
_LIBCPP_BEGIN_NAMESPACE_STD
|
|
|
|
|
[libc++] Use the using_if_exists attribute when provided
As discussed on cfe-dev [1], use the using_if_exists Clang attribute when
the compiler supports it. This makes it easier to port libc++ on top of
new platforms that don't fully support the C Standard library.
Previously, libc++ would fail to build when trying to import a missing
declaration in a <cXXXX> header. With the attribute, the declaration will
simply not be imported into namespace std, and hence it won't be available
for libc++ to use. In many cases, the declarations were *not* actually
required for libc++ to work (they were only surfaced for users to use
them as std::XXXX), so not importing them into namespace std is acceptable.
The same thing could be achieved by conscious usage of `#ifdef` along
with platform detection, however that quickly creates a maintenance
problem as libc++ is ported to new platforms. Furthermore, this problem
is exacerbated when mixed with vendor internal-only platforms, which can
lead to difficulties maintaining a downstream fork of the library.
For the time being, we only use the using_if_exists attribute when it
is supported. At some point in the future, we will start removing #ifdef
paths that are unnecessary when the attribute is supported, and folks
who need those #ifdef paths will be required to use a compiler that
supports the attribute.
[1]: http://lists.llvm.org/pipermail/cfe-dev/2020-June/066038.html
Differential Revision: https://reviews.llvm.org/D90257
2021-06-02 22:41:37 +08:00
|
|
|
using ::sig_atomic_t _LIBCPP_USING_IF_EXISTS;
|
|
|
|
using ::signal _LIBCPP_USING_IF_EXISTS;
|
|
|
|
using ::raise _LIBCPP_USING_IF_EXISTS;
|
2010-05-12 03:42:16 +08:00
|
|
|
|
|
|
|
_LIBCPP_END_NAMESPACE_STD
|
|
|
|
|
2021-04-21 00:03:32 +08:00
|
|
|
#endif // _LIBCPP_CSIGNAL
|