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//Copyright Paul Reiche, Fred Ford. 1992-2002
/*
* 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 02111-1307, USA.
*/
#ifndef UQM_CLOCK_H_
#define UQM_CLOCK_H_
#include "libs/tasklib.h"
#include "displist.h"
#if defined(__cplusplus)
extern "C" {
#endif
#define START_YEAR 2155
#define UPDATE_DAY (1 << 0)
#define UPDATE_MONTH (1 << 1)
#define UPDATE_YEAR (1 << 2)
typedef struct
{
BYTE day_index, month_index;
COUNT year_index;
SIZE tick_count, day_in_ticks;
QUEUE event_q;
/* Queue element is EVENT */
} CLOCK_STATE;
typedef HLINK HEVENT;
typedef struct event
{
// LINK elements; must be first
HEVENT pred, succ;
BYTE day_index, month_index;
COUNT year_index;
BYTE func_index;
} EVENT;
typedef enum
{
ABSOLUTE_EVENT = 0,
RELATIVE_EVENT
} EVENT_TYPE;
#define AllocEvent() AllocLink (&GLOBAL (GameClock.event_q))
#define PutEvent(h) PutQueue (&GLOBAL (GameClock.event_q), (h))
#define InsertEvent(h,i) InsertQueue (&GLOBAL (GameClock.event_q), (h), (i))
#define GetHeadEvent() GetHeadLink (&GLOBAL (GameClock.event_q))
#define GetTailEvent() GetTailLink (&GLOBAL (GameClock.event_q))
#define LockEvent(h,ppe) (*(ppe) = (EVENT*)LockLink (&GLOBAL (GameClock.event_q), h))
#define UnlockEvent(h) UnlockLink (&GLOBAL (GameClock.event_q), (h))
#define RemoveEvent(h) RemoveQueue (&GLOBAL (GameClock.event_q), (h))
#define FreeEvent(h) FreeLink (&GLOBAL (GameClock.event_q), (h))
#define GetPredEvent(l) _GetPredLink (l)
#define GetSuccEvent(l) _GetSuccLink (l)
#define ForAllEvents(callback, arg) ForAllLinks(&GLOBAL (GameClock.event_q), \
(void (*)(LINK *, void *)) (callback), (arg))
// Rates are in seconds per game day
#define HYPERSPACE_CLOCK_RATE 5
// XXX: the IP rate is based on 24 ticks/second (see SetGameClockRate),
// however, IP runs at 30 fps right now. So in reality, the IP clock
// rate is closer to 23 seconds per game day. The clock is faster, but
// the flagship also moves faster.
#define INTERPLANETARY_CLOCK_RATE 30
extern BOOLEAN InitGameClock (void);
extern BOOLEAN UninitGameClock (void);
extern void SetGameClockRate (COUNT seconds_per_day);
extern BOOLEAN ValidateEvent (EVENT_TYPE type, COUNT *pmonth_index,
COUNT *pday_index, COUNT *pyear_index);
extern HEVENT AddEvent (EVENT_TYPE type, COUNT month_index, COUNT
day_index, COUNT year_index, BYTE func_index);
extern void EventHandler (BYTE selector);
extern void GameClockTick (void);
extern void MoveGameClockDays (COUNT days);
// The lock/unlock/running functions are for debugging use only
// Locking will block the GameClockTick() function and thus
// the thread moving the clock.
extern void LockGameClock (void);
extern void UnlockGameClock (void);
// A weak indicator of the clock moving. Suitable for debugging,
// but not much else
extern BOOLEAN GameClockRunning (void);
#if defined(__cplusplus)
}
#endif
#endif /* UQM_CLOCK_H_ */
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