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Put an end to priority inversion in the ata driver. Gave up trying to have fully atomic dual use mutexes so just replaced the ata driver locking with spins. Maybe I'll have better luck later. Things should run smoothly with database updates and such happening in the background.

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@12688 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Michael Sevakis 2007-03-09 08:03:18 +00:00
parent f4b83e6859
commit dee43ece20
6 changed files with 135 additions and 69 deletions
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14
firmware/export/thread.h
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@ -105,6 +105,7 @@ struct thread_entry {
unsigned short stack_size;
#ifdef HAVE_PRIORITY_SCHEDULING
unsigned short priority;
unsigned long priority_x;
long last_run;
#endif
struct thread_entry *next, *prev;
@ -114,6 +115,10 @@ struct core_entry {
struct thread_entry threads[MAXTHREADS];
struct thread_entry *running;
struct thread_entry *sleeping;
#ifdef HAVE_EXTENDED_MESSAGING_AND_NAME
int switch_to_irq_level;
#define STAY_IRQ_LEVEL -1
#endif
};
#ifdef HAVE_PRIORITY_SCHEDULING
@ -149,7 +154,14 @@ void wakeup_thread(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);
#endif
/* Yield that guarantees thread execution once per round regardless of
thread's scheduler priority - basically a transient realtime boost
without altering the scheduler's thread precedence. */
void priority_yield(void);
#else
static inline void priority_yield(void)
{ yield(); }
#endif /* HAVE_PRIORITY_SCHEDULING */
struct thread_entry * thread_get_current(void);
void init_threads(void);
int thread_stack_usage(const struct thread_entry *thread);