#include "proc_p.h"
#include "proc.h"
+#include "idle.h"
#include <kern/irq.h>
#include <kern/monitor.h>
MOD_DEFINE(preempt)
-int preempt_forbid_cnt;
+/// Global preemption disabling nesting counter
+cpu_atomic_t _preempt_forbid_cnt;
static Timer preempt_timer;
-// fwd decl from idle.c
-void idle_init(void);
-
-
-void proc_preempt(void)
+void proc_schedule(void)
{
IRQ_DISABLE;
- ASSERT(preempt_forbid_cnt == 0);
+ ASSERT(proc_allowed());
LIST_ASSERT_VALID(&ProcReadyList);
CurrentProcess = (struct Process *)list_remHead(&ProcReadyList);
ASSERT2(CurrentProcess, "no idle proc?");
TRACEMSG("launching %p:%s", CurrentProcess, proc_currentName());
}
-void proc_preempt_timer(UNUSED_ARG(void *, param))
+void proc_preempt(UNUSED_ARG(void *, param))
{
- if (!preempt_forbid_cnt)
+ if (proc_allowed())
{
IRQ_DISABLE;
TRACEMSG("preempting %p:%s", CurrentProcess, proc_currentName());
-// FIXME: this still break havocs, probably because of some reentrancy issue
+// FIXME: this still breaks havoc, probably because of some reentrancy issue
#if 0
SCHED_ENQUEUE(CurrentProcess);
- proc_preempt();
+ proc_schedule();
#endif
#if CONFIG_KERN_PRI
}
timer_add(&preempt_timer);
}
-void proc_schedule(void)
+void proc_switch(void)
{
ATOMIC(LIST_ASSERT_VALID(&ProcReadyList));
TRACEMSG("%p:%s", CurrentProcess, proc_currentName());
/* Sleeping with IRQs disabled or preemption forbidden is illegal */
IRQ_ASSERT_ENABLED();
- ASSERT(preempt_forbid_cnt == 0);
+ ASSERT(proc_allowed());
- // Will invoke proc_preempt() in interrupt context
+ // Will invoke proc_switch() in interrupt context
kill(0, SIGUSR1);
}
SCHED_ENQUEUE(CurrentProcess);
IRQ_ENABLE;
- proc_schedule();
+ proc_switch();
}
void proc_entry(void (*user_entry)(void))
MOD_CHECK(irq);
MOD_CHECK(timer);
- irq_register(SIGUSR1, proc_preempt);
+ irq_register(SIGUSR1, proc_schedule);
- timer_setSoftint(&preempt_timer, proc_preempt_timer, NULL);
+ timer_setSoftint(&preempt_timer, proc_preempt, NULL);
timer_setDelay(&preempt_timer, CONFIG_KERN_QUANTUM);
timer_add(&preempt_timer);