+/**
+ * \file
+ * <!--
+ * This file is part of BeRTOS.
+ *
+ * Bertos 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.
+ *
+ * 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, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ * As a special exception, you may use this file as part of a free software
+ * library without restriction. Specifically, if other files instantiate
+ * templates or use macros or inline functions from this file, or you compile
+ * this file and link it with other files to produce an executable, this
+ * file does not by itself cause the resulting executable to be covered by
+ * the GNU General Public License. This exception does not however
+ * invalidate any other reasons why the executable file might be covered by
+ * the GNU General Public License.
+ *
+ * Copyright 2008 Bernie Innocenti <bernie@codewiz.org>
+ * -->
+ *
+ * \brief Process scheduler (public interface).
+ *
+ * \version $Id: proc.h 1646 2008-08-17 13:49:48Z bernie $
+ * \author Bernie Innocenti <bernie@codewiz.org>
+ */
+#include "irq.h"
+
+#include <cfg/module.h>
+#include <kern/proc_p.h>
+
+#include <cfg/cfg_kern.h>
+
+#include <unistd.h> // FIXME: move POSIX stuff to irq_posix.h
+
+
+MOD_DEFINE(irq)
+
+// FIXME
+static void (*irq_handlers[100])(void);
+
+/* signal handler */
+void irq_entry(int signum)
+{
+ Process * const old_process = CurrentProcess;
+
+ irq_handlers[signum]();
+
+#if CONFIG_KERN_PREEMPT
+ if (!CurrentProcess)
+ {
+ TRACEMSG("no runnable processes!");
+ IRQ_ENABLE;
+ pause();
+ }
+ else
+ {
+ if (old_process != CurrentProcess)
+ {
+ TRACEMSG("switching from %p:%s to %p:%s",
+ old_process, old_process ? old_process->monitor.name : "-",
+ CurrentProcess, CurrentProcess->monitor.name);
+
+ if (old_process)
+ swapcontext(&old_process->context, &CurrentProcess->context);
+ else
+ setcontext(&CurrentProcess->context);
+
+ // not reached
+ }
+ TRACEMSG("keeping %p:%s", CurrentProcess, CurrentProcess->monitor.name);
+ }
+#endif // CONFIG_KERN_PREEMPT
+}
+
+void irq_register(int irq, void (*callback)(void))
+{
+ irq_handlers[irq] = callback;
+}
+
+void irq_init(void)
+{
+ struct sigaction act;
+ act.sa_handler = irq_entry;
+ sigemptyset(&act.sa_mask);
+ //sigaddset(&act.sa_mask, irq);
+ act.sa_flags = SA_RESTART; // | SA_SIGINFO;
+
+ sigaction(SIGUSR1, &act, NULL);
+ #if !(ARCH & ARCH_QT)
+ sigaction(SIGALRM, &act, NULL);
+ #endif
+
+ MOD_INIT(irq);
+}