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Add queue_send synchronous message sending. Right now only for SWCODEC. Actual usage to be added to playback and recording shortly in upcoming commits.

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@11776 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Michael Sevakis 2006-12-16 18:35:12 +00:00
parent 63a1cb52b4
commit 43c15921e4
6 changed files with 442 additions and 33 deletions
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27
firmware/export/kernel.h
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@ -33,7 +33,7 @@
#define QUEUE_LENGTH 16 /* MUST be a power of 2 */
#define QUEUE_LENGTH_MASK (QUEUE_LENGTH - 1)
/* System defined message ID's, occupying the top 5 bits of the event ID */
/* System defined message ID's, occupying the top 8 bits of the event ID */
#define SYS_EVENT (long)0x80000000 /* SYS events are negative */
#define SYS_USB_CONNECTED ((SYS_EVENT | ((long)1 << 27)))
#define SYS_USB_CONNECTED_ACK ((SYS_EVENT | ((long)2 << 27)))
@ -55,12 +55,29 @@ struct event
void *data;
};
#ifdef HAVE_EXTENDED_MESSAGING_AND_NAME
struct queue_sender
{
struct thread_entry *thread;
void *retval;
};
struct queue_sender_list
{
/* If non-NULL, there is a thread waiting for the corresponding event */
struct queue_sender *senders[QUEUE_LENGTH];
/* Send info for last message dequeued or NULL if replied or not sent */
struct queue_sender *curr_sender;
};
#endif /* HAVE_EXTENDED_MESSAGING_AND_NAME */
struct event_queue
{
struct event events[QUEUE_LENGTH];
struct thread_entry *thread;
unsigned int read;
unsigned int write;
struct queue_sender_list *send;
};
struct mutex
@ -90,12 +107,18 @@ int tick_add_task(void (*f)(void));
int tick_remove_task(void (*f)(void));
extern void queue_init(struct event_queue *q, bool register_queue);
extern void queue_enable_queue_send(struct event_queue *q, struct queue_sender_list *send);
extern void queue_delete(struct event_queue *q);
extern void queue_wait(struct event_queue *q, struct event *ev);
extern void queue_wait_w_tmo(struct event_queue *q, struct event *ev, int ticks);
extern void queue_post(struct event_queue *q, long id, void *data);
#ifdef HAVE_EXTENDED_MESSAGING_AND_NAME
extern void * queue_send(struct event_queue *q, long id, void *data);
extern void queue_reply(struct event_queue *q, void *retval);
extern bool queue_in_queue_send(struct event_queue *q);
#endif /* HAVE_EXTENDED_MESSAGING_AND_NAME */
extern bool queue_empty(const struct event_queue* q);
void queue_clear(struct event_queue* q);
extern void queue_clear(struct event_queue* q);
extern void queue_remove_from_head(struct event_queue *q, long id);
extern int queue_broadcast(long id, void *data);