From c4d8d970f6602c80d7362a41da8851dbbf59ae1b Mon Sep 17 00:00:00 2001
From: Björn Stenberg <bjorn@haxx.se>
Date: Fri, 14 Feb 2003 09:44:34 +0000
Subject: The power-saving SLEEP patch by Simon Elén.
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@3259 a1c6a512-1295-4272-9138-f99709370657
---
 firmware/kernel.c | 14 ++++++++++----
 1 file changed, 10 insertions(+), 4 deletions(-)

(limited to 'firmware/kernel.c')

diff --git a/firmware/kernel.c b/firmware/kernel.c
index 4d2f519171..3255ba0b20 100644
--- a/firmware/kernel.c
+++ b/firmware/kernel.c
@@ -59,13 +59,15 @@ void sleep(int ticks)
     int timeout = current_tick + ticks + 1;
 
     while (TIME_BEFORE( current_tick, timeout )) {
-        yield();
+        sleep_thread();
     }
+    wake_up_thread();
 }
 
 void yield(void)
 {
     switch_thread();
+    wake_up_thread();
 }
 
 /****************************************************************************
@@ -96,8 +98,9 @@ void queue_wait(struct event_queue *q, struct event *ev)
 {
     while(q->read == q->write)
     {
-        switch_thread();
+        sleep_thread();
     }
+    wake_up_thread();
 
     *ev = q->events[(q->read++) & QUEUE_LENGTH_MASK];
 }
@@ -108,8 +111,9 @@ void queue_wait_w_tmo(struct event_queue *q, struct event *ev, int ticks)
 
     while(q->read == q->write && TIME_BEFORE( current_tick, timeout ))
     {
-        switch_thread();
+        sleep_thread();
     }
+    wake_up_thread();
 
     if(q->read != q->write)
     {
@@ -201,6 +205,7 @@ void IMIA0(void)
     }
 
     current_tick++;
+    wake_up_thread();
 
     TSR0 &= ~0x01;
 }
@@ -257,7 +262,8 @@ void mutex_lock(struct mutex *m)
 {
     /* Wait until the lock is open... */
     while(m->locked)
-        yield();
+        sleep_thread();
+    wake_up_thread();
 
     /* ...and lock it */
     m->locked = true;
-- 
cgit v1.2.3