#ifndef BACKEND_H__
#define BACKEND_H__ 1

#include "driver.h"
#include "typedefs.h"
#include "main.h"       /* max_time */

/* --- Types --- */

/* struct statistic_s: Aggregate data for statistics.
 *
 * In particular the structures is used with update_statistic() in order
 * to calculate a weighted average of the last period of time.
 */

struct statistic_s
{
    mp_int  last_time;    /* Time of last weighted-average calculation. */
    long    sum;          /* Sum since last weighted-average calculation. */
    double  weighted_avg; /* The current weighted average. */
};

/* --- Variables --- */

extern mp_int current_time;
extern Bool time_to_call_heart_beat;
extern volatile Bool comm_time_to_call_heart_beat;
extern uint32 total_player_commands;
extern volatile mp_int total_alarms;
extern uint num_listed_objs;
extern uint num_last_processed;
extern uint num_last_data_cleaned;
extern statistic_t stat_last_processed;
extern statistic_t stat_last_data_cleaned;
extern statistic_t stat_in_list;

extern Bool extra_jobs_to_do;

typedef enum { gcDont = 0, gcMalloc, gcEfun } GC_Request;
extern GC_Request gc_request;
extern statistic_t stat_load;
extern statistic_t stat_compile;

extern Bool mud_is_up;

/* --- Prototypes --- */

extern void clear_state (void);
extern void check_alarm (void);
extern void backend (void);
extern void preload_objects (int eflag);
extern svalue_t *f_debug_message (svalue_t *sp);
ALARM_HANDLER_PROT(catch_alarm);
extern void update_statistic (statistic_t * pStat, long number);
extern void update_statistic_avg (statistic_t * pStat, long number);
extern double relate_statistics (statistic_t sStat, statistic_t sRef);
extern void update_compile_av (int lines);
extern svalue_t *v_garbage_collection(svalue_t *sp, int num_arg);
extern svalue_t *f_query_load_average(svalue_t *sp);

/* --- Macros --- */

#endif /* BACKEND_H__ */