/* ************************************************************************
* File: dg_event.h *
* *
* Usage: structures and prototypes for events *
* *
* Written by Eric Green (ejg3@cornell.edu) *
* *
* Changes: *
* 3/6/98 ejg: Changed return type of EVENTFUNC from void to long. *
* Moved struct event definition to events.c. *
* $Author: Mark A. Heilpern/egreen/Welcor $ *
* $Date: 2004/10/11 12:07:00$ *
* $Revision: 1.0.14 $ *
************************************************************************ */
/*
** how often will heartbeat() call the 'wait' event function?
*/
#define PULSE_DG_EVENT 1
/********** Event related section *********/
#define EVENTFUNC(name) long (name)(void *event_obj)
/*
** define event related structures
*/
struct event {
EVENTFUNC(*func);
void *event_obj;
struct q_element *q_el;
};
/****** End of Event related info ********/
/***** Queue related info ******/
/* number of queues to use (reduces enqueue cost) */
#define NUM_EVENT_QUEUES 10
struct queue {
struct q_element *head[NUM_EVENT_QUEUES], *tail[NUM_EVENT_QUEUES];
};
struct q_element {
void *data;
long key;
struct q_element *prev, *next;
};
/****** End of Queue related info ********/
/* - events - function protos need by other modules */
void event_init(void);
struct event *event_create(EVENTFUNC(*func), void *event_obj, long when);
void event_cancel(struct event *event);
void event_process(void);
long event_time(struct event *event);
void event_free_all(void);
/* - queues - function protos need by other modules */
struct queue *queue_init(void);
struct q_element *queue_enq(struct queue *q, void *data, long key);
void queue_deq(struct queue *q, struct q_element *qe);
void *queue_head(struct queue *q);
long queue_key(struct queue *q);
long queue_elmt_key(struct q_element *qe);
void queue_free(struct queue *q);
int event_is_queued(struct event *event);