Setting up 3.5.0 as trunk

src/dg_event.h

@@ -0,0 +1,70 @@
+/* ************************************************************************
+*  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);