//! Defines that give qdel hints.
//!
//! These can be given as a return in [/atom/proc/Destroy] or by calling [/proc/qdel].

/// `qdel` should queue the object for deletion.
#define QDEL_HINT_QUEUE 0
/// `qdel` should let the object live after calling [/atom/proc/Destroy].
#define QDEL_HINT_LETMELIVE 1
/// Functionally the same as the above. `qdel` should assume the object will gc on its own, and not check it.
#define QDEL_HINT_IWILLGC 2
/// Qdel should assume this object won't GC, and queue a hard delete using a hard reference.
#define QDEL_HINT_HARDDEL 3
// Qdel should assume this object won't gc, and hard delete it posthaste.
#define QDEL_HINT_HARDDEL_NOW 4


#ifdef REFERENCE_TRACKING
/** If REFERENCE_TRACKING is enabled, qdel will call this object's find_references() verb.
 *
 * Functionally identical to [QDEL_HINT_QUEUE] if [GC_FAILURE_HARD_LOOKUP] is not enabled in _compiler_options.dm.
*/
#warn TG0001 qdel REFERENCE_TRACKING enabled
#define QDEL_HINT_FINDREFERENCE 5
/// Behavior as [QDEL_HINT_FINDREFERENCE], but only if the GC fails and a hard delete is forced.
#define QDEL_HINT_IFFAIL_FINDREFERENCE 6
#endif

// Defines for the ssgarbage queues
#define GC_QUEUE_FILTER 1 //! short queue to filter out quick gc successes so they don't hang around in the main queue for 5 minutes
#define GC_QUEUE_CHECK 2 //! main queue that waits 5 minutes because thats the longest byond can hold a reference to our shit.
#define GC_QUEUE_HARDDELETE 3 //! short queue for things that hard delete instead of going thru the gc subsystem, this is purely so if they *can* softdelete, they will soft delete rather then wasting time with a hard delete.
#define GC_QUEUE_COUNT 3 //! Number of queues, used for allocating the nested lists. Don't forget to increase this if you add a new queue stage


// Defines for the ssgarbage queue items
#define GC_QUEUE_ITEM_QUEUE_TIME 1 //! Time this item entered the queue
#define GC_QUEUE_ITEM_REF 2 //! Ref to the item
#define GC_QUEUE_ITEM_GCD_DESTROYED 3 //! Item's gc_destroyed var value. Used to detect ref reuse.
#define GC_QUEUE_ITEM_INDEX_COUNT 3 //! Number of item indexes, used for allocating the nested lists. Don't forget to increase this if you add a new queue item index

// Defines for the time an item has to get its reference cleaned before it fails the queue and moves to the next.
#define GC_FILTER_QUEUE (1 SECONDS)
#define GC_CHECK_QUEUE (5 MINUTES)
#define GC_DEL_QUEUE (10 SECONDS)


#define QDEL_ITEM_ADMINS_WARNED (1<<0) //! Set when admins are told about lag causing qdels in this type.
#define QDEL_ITEM_SUSPENDED_FOR_LAG (1<<1) //! Set when a type can no longer be hard deleted on failure because of lag it causes while this happens.

// Defines for the [gc_destroyed][/datum/var/gc_destroyed] var.
#define GC_CURRENTLY_BEING_QDELETED -2

#define QDELING(X) (X.gc_destroyed)
#define QDELETED(X) (isnull(X) || QDELING(X))
#define QDESTROYING(X) (!X || X.gc_destroyed == GC_CURRENTLY_BEING_QDELETED)

// This is a bit hacky, we do it to avoid people relying on a return value for the macro
// If you need that you should use QDEL_IN_STOPPABLE instead
#define QDEL_IN(item, time) addtimer(CALLBACK(GLOBAL_PROC, GLOBAL_PROC_REF(qdel), (time) > GC_FILTER_QUEUE ? WEAKREF(item) : item), time);
#define QDEL_IN_STOPPABLE(item, time) addtimer(CALLBACK(GLOBAL_PROC, GLOBAL_PROC_REF(qdel), (time) > GC_FILTER_QUEUE ? WEAKREF(item) : item), time, TIMER_STOPPABLE)
#define QDEL_IN_CLIENT_TIME(item, time) addtimer(CALLBACK(GLOBAL_PROC, GLOBAL_PROC_REF(qdel), item), time, TIMER_STOPPABLE | TIMER_CLIENT_TIME)
#define QDEL_NULL(item) qdel(item); item = null
#define QDEL_NULL_LIST QDEL_LIST_NULL
#define QDEL_LIST_NULL(x) if(x) { for(var/y in x) { qdel(y) } ; x = null }
#define QDEL_LIST(L) if(L) { for(var/I in L) qdel(I); L.Cut(); }
#define QDEL_LIST_IN(L, time) addtimer(CALLBACK(GLOBAL_PROC, GLOBAL_PROC_REF(______qdel_list_wrapper), L), time, TIMER_STOPPABLE)
#define QDEL_LIST_ASSOC(L) if(L) { for(var/I in L) { qdel(L[I]); qdel(I); } L.Cut(); }
#define QDEL_LIST_ASSOC_VAL(L) if(L) { for(var/I in L) qdel(L[I]); L.Cut(); }