home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
PC World Komputer 1999 mARCH
/
PCWK3A99.iso
/
Linux
/
DDD331
/
DDD-3_1_.000
/
DDD-3_1_
/
ddd-3.1.1
/
ddd
/
SignalB.C
< prev
next >
Wrap
C/C++ Source or Header
|
1998-03-25
|
2KB
|
87 lines
// $Id: SignalB.C,v 1.12 1998/03/25 12:44:11 zeller Exp $ -*- C++ -*-
// Block signals for the lifetime of this object (protect critical sections)
// Copyright (C) 1996 Technische Universitaet Braunschweig, Germany.
// Written by Andreas Zeller <zeller@ips.cs.tu-bs.de>.
//
// This file is part of DDD.
//
// DDD 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 2 of the License, or (at your option) any later version.
//
// DDD 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 DDD -- see the file COPYING.
// If not, write to the Free Software Foundation, Inc.,
// 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
//
// DDD is the data display debugger.
// For details, see the DDD World-Wide-Web page,
// `http://www.cs.tu-bs.de/softech/ddd/',
// or send a mail to the DDD developers <ddd@ips.cs.tu-bs.de>.
char SignalBlocker_rcsid[] =
"$Id: SignalB.C,v 1.12 1998/03/25 12:44:11 zeller Exp $";
#ifdef __GNUG__
#pragma implementation
#endif
#include "SignalB.h"
// The LINUX `sigfillset' macro definition causes a GCC warning.
#if defined(__linux__) && defined(sigfillset)
#undef sigfillset
#endif
// Constructor - block signal SIGNUM
SignalBlocker::SignalBlocker(int signum)
#ifndef SIG_SETMASK
// BSD interface
: old_mask(sigblock(sigmask(signum)));
#endif
{
#ifdef SIG_SETMASK
// POSIX interface
sigset_t new_set;
sigemptyset(&new_set);
sigaddset(&new_set, signum);
sigprocmask(SIG_BLOCK, &new_set, &old_set);
#endif
}
// Constructor - block all signals
SignalBlocker::SignalBlocker()
#ifndef SIG_SETMASK
// BSD interface
: old_mask(sigblock(~0));
#endif
{
#ifdef SIG_SETMASK
// POSIX interface
sigset_t new_set;
sigfillset(&new_set);
sigprocmask(SIG_BLOCK, &new_set, &old_set);
#endif
}
// Destructor - restore state
SignalBlocker::~SignalBlocker()
{
#ifdef SIG_SETMASK
// POSIX interface
sigprocmask(SIG_SETMASK, &old_set, (sigset_t *)0);
#else
// BSD interface
sigsetmask(old_mask);
#endif
}