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CHOMPStation2/code/controllers/Processes/scheduler.dm
Leshana 74332405a8 Optimize scheduler process by sorting its task list
It previously had to iterate over EVERY task in its list every time.   With lots of queued tasks that is slow.
Instead we sort it by schedule time.   That means when iterating thru list, if we get to a single task that is in the future, so are all remaining.
2018-03-08 22:27:47 -05:00

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/var/datum/controller/process/scheduler/scheduler
/************
* Scheduler *
************/
/datum/controller/process/scheduler
var/list/scheduled_tasks
/datum/controller/process/scheduler/setup()
name = "scheduler"
schedule_interval = 1 SECOND
scheduled_tasks = list()
scheduler = src
/datum/controller/process/scheduler/doWork()
var/world_time = world.time
for(last_object in scheduled_tasks)
var/datum/scheduled_task/scheduled_task = last_object
if(world_time < scheduled_task.trigger_time)
break // Too early for this one, and therefore too early for all remaining.
try
unschedule(scheduled_task)
scheduled_task.pre_process()
scheduled_task.process()
scheduled_task.post_process()
catch(var/exception/e)
catchException(e, last_object)
SCHECK
// We've been restarted, probably due to having a massive list of tasks.
// Lets copy over the task list as safely as we can and try to chug thru it...
// Note: We won't be informed about tasks being destroyed, but this is the best we can do.
/datum/controller/process/scheduler/copyStateFrom(var/datum/controller/process/scheduler/target)
scheduled_tasks = list()
for(var/datum/scheduled_task/st in target.scheduled_tasks)
if(!QDELETED(st) && istype(st))
schedule(st)
scheduler = src
// We are being killed. Least we can do is deregister all those events we registered
/datum/controller/process/scheduler/onKill()
for(var/st in scheduled_tasks)
destroyed_event.unregister(st, src)
/datum/controller/process/scheduler/statProcess()
..()
stat(null, "[scheduled_tasks.len] task\s")
/datum/controller/process/scheduler/proc/schedule(var/datum/scheduled_task/st)
dd_insertObjectList(scheduled_tasks, st)
/datum/controller/process/scheduler/proc/unschedule(var/datum/scheduled_task/st)
scheduled_tasks -= st
/**********
* Helpers *
**********/
/proc/schedule_task_in(var/in_time, var/procedure, var/list/arguments = list())
return schedule_task(world.time + in_time, procedure, arguments)
/proc/schedule_task_with_source_in(var/in_time, var/source, var/procedure, var/list/arguments = list())
return schedule_task_with_source(world.time + in_time, source, procedure, arguments)
/proc/schedule_task(var/trigger_time, var/procedure, var/list/arguments)
var/datum/scheduled_task/st = new/datum/scheduled_task(trigger_time, procedure, arguments, /proc/destroy_scheduled_task, list())
scheduler.schedule(st)
return st
/proc/schedule_task_with_source(var/trigger_time, var/source, var/procedure, var/list/arguments)
var/datum/scheduled_task/st = new/datum/scheduled_task/source(trigger_time, source, procedure, arguments, /proc/destroy_scheduled_task, list())
scheduler.schedule(st)
return st
/proc/schedule_repeating_task(var/trigger_time, var/repeat_interval, var/procedure, var/list/arguments)
var/datum/scheduled_task/st = new/datum/scheduled_task(trigger_time, procedure, arguments, /proc/repeat_scheduled_task, list(repeat_interval))
scheduler.schedule(st)
return st
/proc/schedule_repeating_task_with_source(var/trigger_time, var/repeat_interval, var/source, var/procedure, var/list/arguments)
var/datum/scheduled_task/st = new/datum/scheduled_task/source(trigger_time, source, procedure, arguments, /proc/repeat_scheduled_task, list(repeat_interval))
scheduler.schedule(st)
return st
/*************
* Task Datum *
*************/
/datum/scheduled_task
var/trigger_time
var/procedure
var/list/arguments
var/task_after_process
var/list/task_after_process_args
/datum/scheduled_task/New(var/trigger_time, var/procedure, var/list/arguments, var/proc/task_after_process, var/list/task_after_process_args)
..()
src.trigger_time = trigger_time
src.procedure = procedure
src.arguments = arguments ? arguments : list()
src.task_after_process = task_after_process ? task_after_process : /proc/destroy_scheduled_task
src.task_after_process_args = istype(task_after_process_args) ? task_after_process_args : list()
task_after_process_args += src
/datum/scheduled_task/Destroy()
scheduler.unschedule(src)
procedure = null
arguments.Cut()
task_after_process = null
task_after_process_args.Cut()
return ..()
/datum/scheduled_task/dd_SortValue()
return trigger_time
/datum/scheduled_task/proc/pre_process()
task_triggered_event.raise_event(list(src))
/datum/scheduled_task/proc/process()
if(procedure)
call(procedure)(arglist(arguments))
/datum/scheduled_task/proc/post_process()
call(task_after_process)(arglist(task_after_process_args))
// Resets the trigger time, has no effect if the task has already triggered
/datum/scheduled_task/proc/trigger_task_in(var/trigger_in)
src.trigger_time = world.time + trigger_in
/datum/scheduled_task/source
var/datum/source
/datum/scheduled_task/source/New(var/trigger_time, var/datum/source, var/procedure, var/list/arguments, var/proc/task_after_process, var/list/task_after_process_args)
src.source = source
destroyed_event.register(src.source, src, /datum/scheduled_task/source/proc/source_destroyed)
..(trigger_time, procedure, arguments, task_after_process, task_after_process_args)
/datum/scheduled_task/source/Destroy()
source = null
return ..()
/datum/scheduled_task/source/process()
call(source, procedure)(arglist(arguments))
/datum/scheduled_task/source/proc/source_destroyed()
qdel(src)
/proc/destroy_scheduled_task(var/datum/scheduled_task/st)
qdel(st)
/proc/repeat_scheduled_task(var/trigger_delay, var/datum/scheduled_task/st)
st.trigger_time = world.time + trigger_delay
scheduler.schedule(st)