signal.c
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/* GNU Mailutils -- a suite of utilities for electronic mail
Copyright (C) 1999-2002, 2007-2012, 2014-2016 Free Software
Foundation, Inc.
GNU Mailutils 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, or (at your option)
any later version.
GNU Mailutils 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 GNU Mailutils. If not, see <http://www.gnu.org/licenses/>. */
#include "imap4d.h"
jmp_buf child_jmp;
static int __critical_section;
static int __got_signal;
void
imap4d_enter_critical ()
{
__critical_section = 1;
if (__got_signal)
__critical_section++;
}
void
imap4d_leave_critical ()
{
if (__got_signal && __critical_section != 2)
longjmp (child_jmp, __got_signal);
__critical_section = 0;
}
RETSIGTYPE
imap4d_child_signal (int signo)
{
imap4d_child_signal_setup (SIG_IGN);
if (__critical_section)
__got_signal = signo;
else
longjmp (child_jmp, signo);
}