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/*
*
* SQUID Web Proxy Cache http://www.squid-cache.org/
* ----------------------------------------------------------
*
* Squid is the result of efforts by numerous individuals from
* the Internet community; see the CONTRIBUTORS file for full
* details. Many organizations have provided support for Squid's
* development; see the SPONSORS file for full details. Squid is
* Copyrighted (C) 2001 by the Regents of the University of
* California; see the COPYRIGHT file for full details. Squid
* incorporates software developed and/or copyrighted by other
* sources; see the CREDITS file for full details.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
*
*/
#ifndef SQUID_EVENT_H
#define SQUID_EVENT_H
#include "base/Vector.h"
#include "AsyncEngine.h"
#include "MemPool.h"
class StoreEntry;
/* event scheduling facilities - run a callback after a given time period. */
typedef void EVH(void *);
void eventAdd(const char *name, EVH * func, void *arg, double when, int, bool cbdata=true);
void eventAddIsh(const char *name, EVH * func, void *arg, double delta_ish, int);
void eventDelete(EVH * func, void *arg);
void eventInit(void);
void eventFreeMemory(void);
int eventFind(EVH *, void *);
class ev_entry
{
public:
ev_entry(char const * name, EVH * func, void *arg, double when, int weight, bool cbdata=true);
~ev_entry();
MEMPROXY_CLASS(ev_entry);
const char *name;
EVH *func;
void *arg;
double when;
int weight;
bool cbdata;
ev_entry *next;
};
MEMPROXY_CLASS_INLINE(ev_entry);
// manages time-based events
class EventScheduler : public AsyncEngine
{
public:
EventScheduler();
~EventScheduler();
/* cancel a scheduled but not dispatched event */
void cancel(EVH * func, void * arg);
/* clean up the used memory in the scheduler */
void clean();
/* either EVENT_IDLE or milliseconds remaining until the next event */
int timeRemaining() const;
/* cache manager output for the event queue */
void dump(StoreEntry *);
/* find a scheduled event */
bool find(EVH * func, void * arg);
/* schedule a callback function to run in when seconds */
void schedule(const char *name, EVH * func, void *arg, double when, int weight, bool cbdata=true);
int checkEvents(int timeout);
static EventScheduler *GetInstance();
private:
static EventScheduler _instance;
ev_entry * tasks;
};
#endif /* SQUID_EVENT_H */
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