forked from Imagelibrary/binutils-gdb
6a7f1c20e8
We currently have scoped_restore_sigttou and scoped_restore_sigpipe doing basically the same thing -- temporarily ignoring a specific signal. This patch introduce a scoped_restore_signal type that can be used for both. This will become more important for the next patch which changes how the signal-ignoring is implemented. scoped_restore_sigpipe is a straight alias to scoped_restore_signal<SIGPIPE> on systems that define SIGPIPE, and an alias to scoped_restore_signal_nop (a no-op version of scoped_restore_signal) otherwise. scoped_restore_sigttou is not a straight alias because it wants to check the job_control global. gdb/ChangeLog: yyyy-mm-dd Pedro Alves <pedro@palves.net> * gdbsupport/scoped_ignore_signal.h: New. * compile/compile.c: Include gdbsupport/scoped_ignore_signal.h instead of <signal.h>. Don't include <unistd.h>. (scoped_ignore_sigpipe): Remove. * gdbsupport/scoped_ignore_sigttou.h: Include gdbsupport/scoped_ignore_signal.h instead of <signal.h>. Don't include <unistd.h>. (lazy_init): New. (scoped_ignore_sigttou): Reimplement using scoped_ignore_signal and lazy_init. Change-Id: Ibb44d0bd705e96df03ef0787c77358a4a7b7086c
88 lines
2.0 KiB
C++
88 lines
2.0 KiB
C++
/* Support for signoring SIGTTOU.
|
|
|
|
Copyright (C) 2003-2021 Free Software Foundation, Inc.
|
|
|
|
This file is part of GDB.
|
|
|
|
This program is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 3 of the License, or
|
|
(at your option) any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program. If not, see <http://www.gnu.org/licenses/>. */
|
|
|
|
#ifndef SCOPED_IGNORE_SIGTTOU_H
|
|
#define SCOPED_IGNORE_SIGTTOU_H
|
|
|
|
#include "gdbsupport/scoped_ignore_signal.h"
|
|
#include "gdbsupport/job-control.h"
|
|
|
|
#ifdef SIGTTOU
|
|
|
|
/* Simple wrapper that allows lazy initialization / destruction of T.
|
|
Slightly more efficient than gdb::optional, because it doesn't
|
|
carry storage to track whether the object has been initialized. */
|
|
template<typename T>
|
|
class lazy_init
|
|
{
|
|
public:
|
|
void emplace ()
|
|
{
|
|
new (&m_u.obj) T ();
|
|
}
|
|
|
|
void reset ()
|
|
{
|
|
m_u.obj.~T ();
|
|
}
|
|
|
|
private:
|
|
union u
|
|
{
|
|
/* Must define ctor/dtor if T has non-trivial ctor/dtor. */
|
|
u () {}
|
|
~u () {}
|
|
|
|
T obj;
|
|
} m_u;
|
|
};
|
|
|
|
/* RAII class used to ignore SIGTTOU in a scope. This isn't simply
|
|
scoped_ignore_signal<SIGTTOU> because we want to check the
|
|
`job_control' global. */
|
|
|
|
class scoped_ignore_sigttou
|
|
{
|
|
public:
|
|
scoped_ignore_sigttou ()
|
|
{
|
|
if (job_control)
|
|
m_ignore_signal.emplace ();
|
|
}
|
|
|
|
~scoped_ignore_sigttou ()
|
|
{
|
|
if (job_control)
|
|
m_ignore_signal.reset ();
|
|
}
|
|
|
|
DISABLE_COPY_AND_ASSIGN (scoped_ignore_sigttou);
|
|
|
|
private:
|
|
lazy_init<scoped_ignore_signal<SIGTTOU>> m_ignore_signal;
|
|
};
|
|
|
|
#else
|
|
|
|
using scoped_ignore_sigttou = scoped_ignore_signal_nop;
|
|
|
|
#endif
|
|
|
|
#endif /* SCOPED_IGNORE_SIGTTOU_H */
|