SynchronizationLoops

Internal marker struct containing nested struct types used as identifiers for Unity's PlayerLoopSystem injection. Each nested struct represents a custom update loop that ParagonSynchronizationContext injects into Unity's player loop to trigger WorkRunner execution at specific frame phases.

Definition

Namespace: Paragon.Core.Async Assembly: Paragon.dll

[StructLayout(LayoutKind.Sequential, Size = 1)]
internal struct SynchronizationLoops

Visibility: internal — not accessible by game code.

Remarks

Unity's PlayerLoopSystem uses System.Type to identify custom loops. These empty structs serve purely as type markers — they carry no data (forced to Size = 1 by StructLayout). The ParagonSynchronizationContext creates PlayerLoopSystem entries with these types and registers them via PlayerLoopInjector.Inject().

Loop Registration

Nested Struct	Injected Into	Phase	Purpose
SynchronizationContextUpdate	PreUpdate (Append)	Update	Drains updateRunner queue each frame
SynchronizationContextLateUpdate	PreLateUpdate (Append)	LateUpdate	Drains lateUpdateRunner queue each frame
SynchronizationContextFixedUpdate	FixedUpdate (Prepend)	FixedUpdate	Drains fixedUpdateRunner each physics step

Nested Types

SynchronizationContextUpdate

Marker type for the Update-phase synchronization loop.

[StructLayout(LayoutKind.Sequential, Size = 1)]
public struct SynchronizationContextUpdate { }

SynchronizationContextLateUpdate

Marker type for the LateUpdate-phase synchronization loop.

[StructLayout(LayoutKind.Sequential, Size = 1)]
public struct SynchronizationContextLateUpdate { }

SynchronizationContextFixedUpdate

Marker type for the FixedUpdate-phase synchronization loop.

[StructLayout(LayoutKind.Sequential, Size = 1)]
public struct SynchronizationContextFixedUpdate { }

See Also

• ParagonSynchronizationContext — creates and registers these loops

• WorkExecutionTime — enum mapping to these loop phases

• SynchronizationContext System — system overview