* invalidate any other reasons why the executable file might be covered by
* the GNU General Public License.
*
- * Copyright 2001, 2004 Develer S.r.l. (http://www.develer.com/)
- * Copyright 1999, 2000, 2001, 2008 Bernie Innocenti <bernie@codewiz.org>
+ * Copyright 2008 Bernie Innocenti <bernie@codewiz.org>
* -->
*
* \brief Simple realtime multitasking scheduler.
*
* \version $Id: proc.c 1616 2008-08-10 19:41:26Z bernie $
* \author Bernie Innocenti <bernie@codewiz.org>
- * \author Stefano Fedrigo <aleph@develer.com>
*/
#include "proc_p.h"
#include "proc.h"
+#include <kern/irq.h>
#include <cpu/frame.h> // CPU_IDLE
-
-#include <unistd.h> // XXX alarm()
+#include <drv/timer.h>
+#include <cfg/module.h>
/*
*/
uint16_t Quantum;
+Timer preempt_timer;
+
/**
* Disable preemptive task switching.
*
--CurrentProcess->forbid_cnt;
}
-static void (*irq_handlers[100])(void); // FIXME
-
void proc_preempt(void)
{
ATOMIC(LIST_ASSERT_VALID(&ProcReadyList));
+ TRACEMSG("hello1");
IRQ_DISABLE;
/* Poll on the ready queue for the first ready process */
while (!(CurrentProcess = (struct Process *)list_remHead(&ProcReadyList)))
{
+ //TRACEMSG("hello2");
/*
* Make sure we physically reenable interrupts here, no matter what
* the current task status is. This is important because if we
* are reloaded.
*/
IRQ_ENABLE;
- CPU_IDLE;
+ //FIXME: calls Qt stuff from sighandler! CPU_IDLE;
MEMORY_BARRIER;
IRQ_DISABLE;
+ //TRACEMSG("hello3");
}
IRQ_ENABLE;
+ TRACEMSG("hello4");
}
-void proc_preempt_timer(void)
+void proc_preempt_timer(UNUSED_ARG(void *, param))
{
- // TODO: check Quantum
+ IRQ_DISABLE;
+ if (CurrentProcess)
+ {
+ TRACEMSG("preempting %p:%s", CurrentProcess, CurrentProcess->monitor.name);
+ SCHED_ENQUEUE(CurrentProcess);
+ IRQ_ENABLE;
+ proc_preempt();
+ }
+ IRQ_ENABLE;
- alarm(1);
- ATOMIC(SCHED_ENQUEUE(CurrentProcess));
- proc_schedule();
+ timer_setDelay(&preempt_timer, CONFIG_KERN_QUANTUM);
+ timer_add(&preempt_timer);
}
void proc_schedule(void)
{
+ TRACE;
+
+ // Will invoke proc_preempt() in interrupt context
kill(0, SIGUSR1);
}
proc_schedule();
}
-/* signal handler */
-void irq_entry(int signum)
+void proc_entry(void (*user_entry)(void))
{
- Process *old_process;
-
- TRACEMSG("storing %p:%s", CurrentProcess, CurrentProcess->monitor.name);
- CurrentProcess->leaving = false;
- getcontext(&CurrentProcess->context);
- /* We get here in two ways: directly, and after setcontext() below */
-
- if (CurrentProcess->leaving)
- {
- TRACEMSG("leaving to %p:%s", CurrentProcess, CurrentProcess->monitor.name);
- return;
- }
-
- old_process = CurrentProcess;
-
- irq_handlers[signum]();
-
- if (old_process != CurrentProcess)
- {
- TRACEMSG("launching %p:%s", CurrentProcess, CurrentProcess->monitor.name);
- CurrentProcess->leaving = true;
- setcontext(&CurrentProcess->context);
- /* not reached */
- }
-
- TRACEMSG("keeping %p:%s", CurrentProcess, CurrentProcess->monitor.name);
+ user_entry();
+ proc_exit();
}
void preempt_init(void)
{
- struct sigaction act;
- act.sa_handler = irq_entry;
- sigemptyset(&act.sa_mask);
- sigaddset(&act.sa_mask, SIGUSR1);
- sigaddset(&act.sa_mask, SIGALRM);
- act.sa_flags = SA_RESTART; /* | SA_SIGINFO; */
-
- irq_handlers[SIGUSR1] = proc_preempt;
- irq_handlers[SIGALRM] = proc_preempt_timer;
- sigaction(SIGUSR1, &act, NULL);
- sigaction(SIGALRM, &act, NULL);
-
- alarm(1); // FIXME
+ MOD_CHECK(irq);
+ MOD_CHECK(timer);
+
+ irq_register(SIGUSR1, proc_preempt);
+
+ timer_setSoftint(&preempt_timer, proc_preempt_timer, NULL);
+ timer_setDelay(&preempt_timer, CONFIG_KERN_QUANTUM);
+ timer_add(&preempt_timer);
}