# SystemState > Contains raw entity system state. Used by unmanaged systems (ISystem) as well as managed systems behind the scenes. ## Definition * **Type:** Struct * **Namespace:** [Unity.Entities](/engine/7000.0/script-reference/unity/entities.md) * **Assembly:** UnityEngine.EntitiesModule ```csharp public ref struct SystemState ``` ## Properties | Property | Description | | ---------------------------------------------------------------------------------------------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------- | | [DebugName](/engine/7000.0/script-reference/unity/entities/systemstate/debugname.md) | Return a debug name for unmanaged systems. | | [Dependency](/engine/7000.0/script-reference/unity/entities/systemstate/dependency.md) | The ECS-related data dependencies of the system. | | [Enabled](/engine/7000.0/script-reference/unity/entities/systemstate/enabled.md) | Controls whether this system executes when its OnUpdate function is called. | | [EntityManager](/engine/7000.0/script-reference/unity/entities/systemstate/entitymanager.md) | The EntityManager object of the [SystemState.World](/engine/7000.0/script-reference/unity/entities/systemstate/world.md) in which this system exists. | | [GlobalSystemVersion](/engine/7000.0/script-reference/unity/entities/systemstate/globalsystemversion.md) | The current change version number in this [SystemState.World](/engine/7000.0/script-reference/unity/entities/systemstate/world.md). | | [LastSystemVersion](/engine/7000.0/script-reference/unity/entities/systemstate/lastsystemversion.md) | The current version of this system. | | [SystemHandle](/engine/7000.0/script-reference/unity/entities/systemstate/systemhandle.md) | The untyped system's handle. | | [UnmanagedMetaIndex](/engine/7000.0/script-reference/unity/entities/systemstate/unmanagedmetaindex.md) | Return the unmanaged type index of the system (>= 0 for ISystem-type systems), or -1 for managed systems. | | [World](/engine/7000.0/script-reference/unity/entities/systemstate/world.md) | The World in which this system exists. | | [WorldUnmanaged](/engine/7000.0/script-reference/unity/entities/systemstate/worldunmanaged.md) | The unmanaged portion of the world in which this system exists. | | [WorldUpdateAllocator](/engine/7000.0/script-reference/unity/entities/systemstate/worldupdateallocator.md) | Retrieve the world update allocator of the World in which this system exists. | ## Methods | Method | Description | | ---------------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | [CompleteDependency](/engine/7000.0/script-reference/unity/entities/systemstate/completedependency.md) | Completes combined job handles registered with this system. See [SystemState.Dependency](/engine/7000.0/script-reference/unity/entities/systemstate/dependency.md) for more information. | | [GetBufferLookup](/engine/7000.0/script-reference/unity/entities/systemstate/getbufferlookup.md) | Manually gets a BufferLookup\\\ object that can access a [DynamicBuffer\](/engine/7000.0/script-reference/unity/entities/dynamicbuffer1.md). | | [GetBufferTypeHandle](/engine/7000.0/script-reference/unity/entities/systemstate/getbuffertypehandle.md) | Manually gets the run-time type information required to access an array of buffer components in a chunk. | | [GetComponentLookup](/engine/7000.0/script-reference/unity/entities/systemstate/getcomponentlookup.md) | Manually gets a dictionary-like container containing all components of type T, keyed by Entity. | | [GetComponentTypeHandle](/engine/7000.0/script-reference/unity/entities/systemstate/getcomponenttypehandle.md) | Manually gets the run-time type information required to access an array of component data in a chunk. | | [GetDynamicComponentTypeHandle](/engine/7000.0/script-reference/unity/entities/systemstate/getdynamiccomponenttypehandle.md) | Manually gets the run-time type information required to access an array of component data in a chunk. | | [GetDynamicSharedComponentTypeHandle](/engine/7000.0/script-reference/unity/entities/systemstate/getdynamicsharedcomponenttypehandle.md) | Manually gets the run-time type information required to access a shared component data in a chunk. | | [GetEntityQuery](/engine/7000.0/script-reference/unity/entities/systemstate/getentityquery.md) | Gets the cached query for the specified component types, if one exists; otherwise, creates a new query instance and caches it. | | [GetEntityStorageInfoLookup](/engine/7000.0/script-reference/unity/entities/systemstate/getentitystorageinfolookup.md) | Manually gets a dictionary-like container containing information about how entities are stored. | | [GetEntityTypeHandle](/engine/7000.0/script-reference/unity/entities/systemstate/getentitytypehandle.md) | Manually gets the runtime type information required to access the array of [Entity](/engine/7000.0/script-reference/unity/entities/entity.md) objects in a chunk. | | [GetSharedComponentTypeHandle](/engine/7000.0/script-reference/unity/entities/systemstate/getsharedcomponenttypehandle.md) | Manually gets the run-time type information required to access a shared component data in a chunk. | | [GetTransformLookup](/engine/7000.0/script-reference/unity/entities/systemstate/gettransformlookup.md) | Manually gets a [TransformLookup](/engine/7000.0/script-reference/unity/entities/transformlookup.md) object that can access a [TransformRef](/engine/7000.0/script-reference/unity/entities/transformref.md). | | [GetTransformRef](/engine/7000.0/script-reference/unity/entities/systemstate/gettransformref.md) | Gets the TransformRef of an entity. | | [GetTransformTypeHandle](/engine/7000.0/script-reference/unity/entities/systemstate/gettransformtypehandle.md) | Manually gets the run-time type information required to access transforms in a chunk. | | [RequireAnyForUpdate](/engine/7000.0/script-reference/unity/entities/systemstate/requireanyforupdate.md) | Provide a set of queries, one of which must match entities for the system to run. | | [RequireForUpdate](/engine/7000.0/script-reference/unity/entities/systemstate/requireforupdate.md) | Adds a query that must return entities for the system to run. You can add multiple required queries to a system; all of them must match at least one entity for the system to run. | | [ShouldRunSystem](/engine/7000.0/script-reference/unity/entities/systemstate/shouldrunsystem.md) | Reports whether this system satisfies the criteria to update. This function is used internally to determine whether the system's OnUpdate function can be skipped. |