devs/foxbox
1
0
Fork 0
forked from len0rd/rockbox
Code Pull requests Activity

Place some LIKELY and UNLIKELY hints in kernel where I can definitively say anything about it and where it could make a small difference.

Browse source 
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@19433 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Michael Sevakis 2008-12-14 07:09:26 +00:00
parent 5b2a600007
commit 0fab3e36f3
2 changed files with 28 additions and 28 deletions
Download patch file Download diff file Expand all files Collapse all files

18
firmware/kernel.c
View file

@ -391,7 +391,7 @@ static inline void queue_do_unblock_sender(struct queue_sender_list *send,
{
struct thread_entry **spp = &send->senders[i];
if(*spp)
if(UNLIKELY(*spp))
{
queue_release_sender(spp, 0);
}
@ -665,13 +665,13 @@ intptr_t queue_send(struct event_queue *q, long id, intptr_t data)
q->events[wr].id = id;
q->events[wr].data = data;
if(q->send)
if(LIKELY(q->send))
{
struct queue_sender_list *send = q->send;
struct thread_entry **spp = &send->senders[wr];
struct thread_entry *current = cores[CURRENT_CORE].running;
if(*spp)
if(UNLIKELY(*spp))
{
/* overflow protect - unblock any thread waiting at this index */
queue_release_sender(spp, 0);
@ -735,7 +735,7 @@ void queue_reply(struct event_queue *q, intptr_t retval)
int oldlevel = disable_irq_save();
corelock_lock(&q->cl);
/* Double-check locking */
IF_COP( if(q->send && q->send->curr_sender) )
IF_COP( if(LIKELY(q->send && q->send->curr_sender)) )
{
queue_release_sender(&q->send->curr_sender, retval);
}
@ -890,7 +890,7 @@ void mutex_lock(struct mutex *m)
/* lock out other cores */
corelock_lock(&m->cl);
if(m->locked == 0)
if(LIKELY(m->locked == 0))
{
/* lock is open */
MUTEX_SET_THREAD(m, current);
@ -933,7 +933,7 @@ void mutex_unlock(struct mutex *m)
corelock_lock(&m->cl);
/* transfer to next queued thread if any */
if(m->queue == NULL)
if(LIKELY(m->queue == NULL))
{
/* no threads waiting - open the lock */
MUTEX_SET_THREAD(m, NULL);
@ -1031,7 +1031,7 @@ void semaphore_wait(struct semaphore *s)
corelock_lock(&s->cl);
if(--s->count >= 0)
if(LIKELY(--s->count >= 0))
{
/* wait satisfied */
corelock_unlock(&s->cl);
@ -1099,7 +1099,7 @@ int wakeup_wait(struct wakeup *w, int timeout)
corelock_lock(&w->cl);
if(w->signalled == 0 && timeout != TIMEOUT_NOBLOCK)
if(LIKELY(w->signalled == 0 && timeout != TIMEOUT_NOBLOCK))
{
struct thread_entry * current = cores[CURRENT_CORE].running;
@ -1118,7 +1118,7 @@ int wakeup_wait(struct wakeup *w, int timeout)
corelock_lock(&w->cl);
}
if(w->signalled == 0)
if(UNLIKELY(w->signalled == 0))
{
/* Timed-out or failed */
ret = (timeout != TIMEOUT_BLOCK) ?