minix/servers/inet/generic/event.c

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2005-04-21 16:53:53 +02:00
/*
inet/generic/event.c
Created: April 1995 by Philip Homburg <philip@cs.vu.nl>
Implementation of an event queue.
Copyright 1995 Philip Homburg
*/
#include "inet.h"
#include "assert.h"
#include "event.h"
THIS_FILE
event_t *ev_head;
static event_t *ev_tail;
void ev_init(ev)
event_t *ev;
{
ev->ev_func= 0;
ev->ev_next= NULL;
}
void ev_enqueue(ev, func, ev_arg)
event_t *ev;
ev_func_t func;
ev_arg_t ev_arg;
{
assert(ev->ev_func == 0);
ev->ev_func= func;
ev->ev_arg= ev_arg;
ev->ev_next= NULL;
if (ev_head == NULL)
ev_head= ev;
else
ev_tail->ev_next= ev;
ev_tail= ev;
}
void ev_process()
{
ev_func_t func;
event_t *curr;
while (ev_head)
{
curr= ev_head;
ev_head= curr->ev_next;
func= curr->ev_func;
curr->ev_func= 0;
assert(func != 0);
func(curr, curr->ev_arg);
}
}
int ev_in_queue(ev)
event_t *ev;
{
return ev->ev_func != 0;
}
/*
* $PchId: event.c,v 1.4 1995/11/21 06:45:27 philip Exp $
*/