#ifndef VTXQUEUE_H_INCLUDED
#define VTXQUEUE_H_INCLUDED

/* $Id: vtxqueue.h,v 1.1 1997/04/28 01:58:12 mb Exp mb $
 * 
 * Copyright (c) 1994-96 Martin Buck  <martin-2.buck@student.uni-ulm.de>
 * Read COPYING for more information
 */


#include <time.h>
#include "xevents.h"


/* Usage of priorities:
 * PRI_LOW: Page-lookahead (use for pages which don't necessarily exist)
 * PRI_MED: Hotlist
 * PRI_HIGH: User-initiated background search (search even if page is in cache)
 * PRI_TOP: For TOP-text pseudo-pages (may even throw out other pages out of active DAUs)
 * PRI_FGROUND: Search page in foreground immediately.
 * PRI_FGROUND_NH: Like PRI_FGROUND, but don't update page-history
 */
enum { PRI_LOW = 1, PRI_MED, PRI_HIGH, PRI_TOP, PRI_FGROUND_NH, PRI_FGROUND, PRI_ALL };
enum { STAT_NEW, STAT_SEARCH, STAT_TIMEOUT, STAT_FOUND, STAT_READ, STAT_READ_MP, STAT_FOUND_MP,
       STAT_SEARCH_MP };


typedef struct {
  int page, subpage, firstsubpg, lastsubpg, priority, page_found, keep_running;
  time_t timeout;
} queue_entry_t;


extern int vtx_dev_open, dau_status_changed, clear_cache;
extern queue_entry_t *dau_status;


int get_page(int priority, int page, int subpage, int hour, byte_t *buffer,
    vtxpgwin_t *vtxwin);
void top_getpage(int page, int hour, int minute);
int top_flush_getpage(void);
void stop_search(int page);
int remove_priority(int priority);
int queue_itimer(void);
void history_insert(int page, int do_select);
void history_reset(void);
void history_set_status(int page, int status);
int timeout_set(int page, int flag); 
int timeout_check(int page);
void timeout_reset(void);

#endif /* VTXQUEUE_H_INCLUDED */