/*

 * lftp - file transfer program

 *

 * Copyright (c) 1996-2012 by Alexander V. Lukyanov (lav@yars.free.net)

 *

 * 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 SIGNALHOOK_H

#define SIGNALHOOK_H

#include <signal.h>

typedef void (*signal_handler)(int);

class SignalHook

{

   static int *counts;

   static struct sigaction *old_handlers;

   static bool *old_saved;

   static void cnt_handler(int sig);

   static void set_signal(int sig,signal_handler handler);

public:

   static void DoCount(int sig) { set_signal(sig,&SignalHook::cnt_handler); }

   static int GetCount(int sig) { return counts[sig]; }

   static void ResetCount(int sig) { counts[sig]=0; }

   static void IncreaseCount(int sig) { counts[sig]++; }

   static void Handle(int sig,void (*h)(int)) { set_signal(sig,h); }

   static void Ignore(int sig)  { set_signal(sig,(signal_handler)SIG_IGN); }

   static void Default(int sig) { set_signal(sig,(signal_handler)SIG_DFL); }

   static void Restore(int sig);

   static void Block(int sig);

   static void Unblock(int sig);

   static void RestoreAll();

   static void ClassInit();

   static void Cleanup();

};

#endif//SIGNALHOOK_H