56 lines
1.8 KiB
C++
56 lines
1.8 KiB
C++
/*******************************************************************************
|
|
|
|
Copyright(C) Jonas 'Sortie' Termansen 2011, 2012.
|
|
|
|
This file is part of the Sortix C Library.
|
|
|
|
The Sortix C Library is free software: you can redistribute it and/or modify
|
|
it under the terms of the GNU Lesser General Public License as published by
|
|
the Free Software Foundation, either version 3 of the License, or (at your
|
|
option) any later version.
|
|
|
|
The Sortix C Library 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 Lesser General Public
|
|
License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public License
|
|
along with the Sortix C Library. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
signal/signal.cpp
|
|
Handles the good old unix signals.
|
|
|
|
*******************************************************************************/
|
|
|
|
#include <sys/types.h>
|
|
#include <sys/syscall.h>
|
|
|
|
#include <signal.h>
|
|
|
|
const int MAX_SIGNALS = 128;
|
|
sighandler_t handlers[MAX_SIGNALS];
|
|
|
|
extern "C" void SignalHandlerAssembly(int signum);
|
|
extern "C" void SignalHandler(int signum)
|
|
{
|
|
if ( 0 <= signum && signum < (int) MAX_SIGNALS )
|
|
handlers[signum](signum);
|
|
}
|
|
|
|
DEFN_SYSCALL1(int, sys_register_signal_handler, SYSCALL_REGISTER_SIGNAL_HANDLER, sighandler_t);
|
|
|
|
extern "C" void init_signal()
|
|
{
|
|
for ( int i = 0; i < MAX_SIGNALS; i++ )
|
|
handlers[i] = SIG_DFL;
|
|
|
|
// Tell the kernel which function we want called upon signals.
|
|
sys_register_signal_handler(&SignalHandlerAssembly);
|
|
}
|
|
|
|
extern "C" sighandler_t signal(int signum, sighandler_t handler)
|
|
{
|
|
if ( signum < 0 || MAX_SIGNALS <= signum ) { return SIG_ERR; }
|
|
return handlers[signum] = handler;
|
|
}
|