diff options
Diffstat (limited to 'firmware/kernel.h')
| -rw-r--r-- | firmware/kernel.h | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/firmware/kernel.h b/firmware/kernel.h index 60e8ad6..cef6cfe 100644 --- a/firmware/kernel.h +++ b/firmware/kernel.h @@ -25,6 +25,22 @@ #define HZ 100 /* number of ticks per second */ +#define QUEUE_LENGTH 16 /* MUST be a power of 2 */ +#define QUEUE_LENGTH_MASK (QUEUE_LENGTH - 1) + +struct event +{ + int id; + void *data; +}; + +struct event_queue +{ + struct event events[QUEUE_LENGTH]; + unsigned int read; + unsigned int write; +}; + /* global tick variable */ extern long current_tick; @@ -32,5 +48,8 @@ extern long current_tick; extern void yield(void); extern void sleep(int ticks); +extern void queue_init(struct event_queue *q); +extern struct event *queue_wait(struct event_queue *q); +extern void queue_post(struct event_queue *q, int id, void *data); #endif |