#define MC_TICK_CHECK ( ( TICK_USAGE > Master.current_ticklimit || src.state != SS_RUNNING ) ? pause() : 0 )

// Used for splitting up your remaining time into phases, if you want to evenly divide it.
#define MC_SPLIT_TICK_INIT(phase_count) var/original_tick_limit = Master.current_ticklimit; var/split_tick_phases = ##phase_count
#define MC_SPLIT_TICK \
    if(split_tick_phases > 1){\
        Master.current_ticklimit = ((original_tick_limit - TICK_USAGE) / split_tick_phases) + TICK_USAGE;\
        --split_tick_phases;\
    } else {\
        Master.current_ticklimit = original_tick_limit;\
    }

// Used to smooth out costs to try and avoid oscillation.
#define MC_AVERAGE_FAST(average, current) (0.7 * (average) + 0.3 * (current))
#define MC_AVERAGE(average, current) (0.8 * (average) + 0.2 * (current))
#define MC_AVERAGE_SLOW(average, current) (0.9 * (average) + 0.1 * (current))
#define NEW_SS_GLOBAL(varname) if(varname != src){if(istype(varname)){Recover();qdel(varname);}varname = src;}

#define START_PROCESSING(Processor, Datum) if (!Datum.isprocessing) {Datum.isprocessing = 1;Processor.processing += Datum}
#define STOP_PROCESSING(Processor, Datum) Datum.isprocessing = 0;Processor.processing -= Datum

//SubSystem flags (Please design any new flags so that the default is off, to make adding flags to subsystems easier)

//subsystem does not initialize.
#define SS_NO_INIT 1

//subsystem does not fire.
//	(like can_fire = 0, but keeps it from getting added to the processing subsystems list)
//	(Requires a MC restart to change)
#define SS_NO_FIRE 2

//subsystem only runs on spare cpu (after all non-background subsystems have ran that tick)
//	SS_BACKGROUND has its own priority bracket
#define SS_BACKGROUND 4

//subsystem does not tick check, and should not run unless there is enough time (or its running behind (unless background))
#define SS_NO_TICK_CHECK 8

//Treat wait as a tick count, not DS, run every wait ticks.
//	(also forces it to run first in the tick, above even SS_NO_TICK_CHECK subsystems)
//	(implies all runlevels because of how it works)
//	(overrides SS_BACKGROUND)
//	This is designed for basically anything that works as a mini-mc (like SStimer)
#define SS_TICKER 16

//keep the subsystem's timing on point by firing early if it fired late last fire because of lag
//	ie: if a 20ds subsystem fires say 5 ds late due to lag or what not, its next fire would be in 15ds, not 20ds.
#define SS_KEEP_TIMING 32

//Calculate its next fire after its fired.
//	(IE: if a 5ds wait SS takes 2ds to run, its next fire should be 5ds away, not 3ds like it normally would be)
//	This flag overrides SS_KEEP_TIMING
#define SS_POST_FIRE_TIMING 64

//SUBSYSTEM STATES
#define SS_IDLE 0		//aint doing shit.
#define SS_QUEUED 1		//queued to run
#define SS_RUNNING 2	//actively running
#define SS_PAUSED 3		//paused by mc_tick_check
#define SS_SLEEPING 4	//fire() slept.
#define SS_PAUSING 5 	//in the middle of pausing

// Standard way to define a global subsystem, keep boilerplate organized here!
#define SUBSYSTEM_DEF(X) var/datum/controller/subsystem/##X/SS##X;\
/datum/controller/subsystem/##X/New(){\
    NEW_SS_GLOBAL(SS##X);\
    PreInit();\
}\
/datum/controller/subsystem/##X