fef/ardix
1
0
Fork 0
Code Issues Pull requests Projects Releases Wiki Activity

sched: use spinlock for atomic context

Browse source
This commit is contained in:
Felix Kopp 2020-11-30 22:20:50 +01:00
parent e45f75f6bc
commit 63f78d7b2b
No known key found for this signature in database
GPG key ID: C478BA0A85F75728
2 changed files with 5 additions and 4 deletions
arch/at91sam3x8e
sched.c
kernel
sched.c

4
arch/at91sam3x8e/sched.c
View file

@ -11,13 +11,15 @@
#include <stdbool.h>
#include <toolchain.h>
#include <ardix/spinlock.h>
void irq_sys_tick(void)
{
/*
* fire a PendSV interrupt and do the actual context switching there
* because it is faster that way (according to the docs, at least)
*/
if (!_is_atomic_context)
if (!spinlock_count(&_in_atomic_context))
arch_irq_invoke(IRQNO_PEND_SV);
}

5
kernel/sched.c
View file

@ -51,7 +51,7 @@ static inline bool sched_proc_should_run(const struct process *proc)
{
enum proc_state state = proc->state;
if (state == PROC_QUEUE || state == PROC_READY)
if (state == PROC_QUEUE || state == PROC_READY || state == PROC_IOWAIT)
return true;
return false;
@ -68,14 +68,13 @@ void *sched_process_switch(void *curr_sp)
while (1) {
nextpid++;
nextpid %= CONFIG_SCHED_MAXPROC;
if (proc_table[nextpid] != NULL && proc_table[nextpid]->state == PROC_QUEUE) {
if (proc_table[nextpid] != NULL && sched_proc_should_run(proc_table[nextpid])) {
_current_process = proc_table[nextpid];
break;
}
/* TODO: Add idle thread */
}
_current_process = proc_table[nextpid];
_current_process->state = PROC_READY;
return _current_process->sp;
}