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Fix a hole in the scheduler where collisions between waking blocked threads in mutexes with interrupts waking blocked threads in message queues can occur. Queue posts will put the threads on a separate list that is then added to the running list with IRQs disabled on the next task switch or CPU wakeup. Basically no overhead for other operations. Seems a likely cause of my occasional observation of the backlight fade causing playback threads to stop running and a recently reported blocking violation upon USB plugging. Time will tell but banging the backlight on and off frequently hasn't hiccuped again for me on H120.

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@12915 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Michael Sevakis 2007-03-26 03:24:36 +00:00
parent 5e2984ad80
commit 165f62d0cd
3 changed files with 70 additions and 7 deletions
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3
firmware/export/thread.h
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@ -119,6 +119,8 @@ struct core_entry {
struct thread_entry threads[MAXTHREADS];
struct thread_entry *running;
struct thread_entry *sleeping;
struct thread_entry *waking;
struct thread_entry **wakeup_list;
#ifdef HAVE_EXTENDED_MESSAGING_AND_NAME
int switch_to_irq_level;
#define STAY_IRQ_LEVEL -1
@ -193,6 +195,7 @@ void set_irq_level_and_block_thread_w_tmo(struct thread_entry **list,
#endif
#endif
void wakeup_thread(struct thread_entry **thread);
void wakeup_thread_irq_safe(struct thread_entry **thread);
#ifdef HAVE_PRIORITY_SCHEDULING
int thread_set_priority(struct thread_entry *thread, int priority);
int thread_get_priority(struct thread_entry *thread);