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