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54 lines
1.7 KiB
C++
54 lines
1.7 KiB
C++
/*******************************************************************************
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Copyright(C) Jonas 'Sortie' Termansen 2011, 2012.
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This file is part of the Sortix C Library.
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The Sortix C Library is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation, either version 3 of the License, or (at your
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option) any later version.
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The Sortix C Library is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with the Sortix C Library. If not, see <http://www.gnu.org/licenses/>.
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signal.cpp
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Handles the good old unix signals.
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*******************************************************************************/
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#include <sys/types.h>
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#include <sys/syscall.h>
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#include <signal.h>
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const int MAX_SIGNALS = 128;
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sighandler_t handlers[MAX_SIGNALS];
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extern "C" void SignalHandlerAssembly(int signum);
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extern "C" void SignalHandler(int signum)
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{
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if ( 0 <= signum && signum < (int) MAX_SIGNALS )
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handlers[signum](signum);
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}
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DEFN_SYSCALL1_VOID(sys_register_signal_handler, SYSCALL_REGISTER_SIGNAL_HANDLER, sighandler_t);
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extern "C" void init_signal()
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{
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for ( int i = 0; i < MAX_SIGNALS; i++ )
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handlers[i] = SIG_DFL;
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// Tell the kernel which function we want called upon signals.
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sys_register_signal_handler(&SignalHandlerAssembly);
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}
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extern "C" sighandler_t signal(int signum, sighandler_t handler)
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{
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if ( signum < 0 || MAX_SIGNALS <= signum ) { return SIG_ERR; }
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return handlers[signum] = handler;
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}
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