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Add a lightweight wakeup object for fast processors.

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@16885 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Michael Sevakis 2008-03-30 04:59:51 +00:00
parent 8a6fd3ff4e
commit bc192c953e
3 changed files with 105 additions and 0 deletions
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23
firmware/export/kernel.h
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@ -78,6 +78,11 @@
#define IS_SYSEVENT(ev) ((ev & SYS_EVENT) == SYS_EVENT)
#ifndef TIMEOUT_BLOCK
#define TIMEOUT_BLOCK -1
#define TIMEOUT_NOBLOCK 0
#endif
struct queue_event
{
long id;
@ -178,6 +183,17 @@ struct event
};
#endif
#ifdef HAVE_WAKEUP_OBJECTS
struct wakeup
{
struct thread_entry *queue; /* waiter list */
unsigned char signalled; /* signalled status */
IF_COP( struct corelock cl; ) /* multiprocessor sync */
};
#endif
/* global tick variable */
#if defined(CPU_PP) && defined(BOOTLOADER)
/* We don't enable interrupts in the iPod bootloader, so we need to fake
@ -225,6 +241,7 @@ void timeout_cancel(struct timeout *tmo);
#define STATE_SIGNALED 1
#define WAIT_TIMEDOUT (-1)
#define WAIT_FAILED 0
#define WAIT_SUCCEEDED 1
extern void queue_init(struct event_queue *q, bool register_queue);
@ -274,4 +291,10 @@ extern void event_wait(struct event *e, unsigned int for_state);
extern void event_set_state(struct event *e, unsigned int state);
#endif /* HAVE_EVENT_OBJECTS */
#ifdef HAVE_WAKEUP_OBJECTS
extern void wakeup_init(struct wakeup *w);
extern int wakeup_wait(struct wakeup *w, int timeout);
extern int wakeup_signal(struct wakeup *w);
#endif /* HAVE_WAKEUP_OBJECTS */
#endif /* _KERNEL_H_ */