/*******************************************************************************

    Copyright(C) Jonas 'Sortie' Termansen 2011, 2012.

    This file is part of Sortix.

    Sortix 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.

    Sortix 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
    Sortix. If not, see <http://www.gnu.org/licenses/>.

    signal.h
    Classes and functions making it easier to handle Unix signals.

*******************************************************************************/

#ifndef SORTIX_SIGNAL_H
#define SORTIX_SIGNAL_H

#include <sortix/signal.h>

#include "cpu.h"

namespace Sortix {

extern "C" volatile unsigned long asm_signal_is_pending;

namespace Signal {

class Queue
{
public:
	Queue();

// TODO: This is the wrong data structure for the problem!
private:
	bool pending[SIG_MAX_NUM];

// TODO: This is not SMP ready:
// To avoid race conditions, these should be called with interrupts off.
public:
	void Push(int signum);
	int Pop(int cursig);

};

void Init();
int Priority(int signum);
void Dispatch(CPU::InterruptRegisters* regs, void* user = NULL);
void Return(CPU::InterruptRegisters* regs, void* user = NULL);
inline bool IsPending() { return asm_signal_is_pending != 0; }

} // namespace Signal
} // namespace Sortix

#endif