static void DestroyChunks(EntityManager entityManager, NativeList <ArchetypeChunk> chunks)
{
s_DestroyChunksProfilerMarker.Begin();
new DestroyChunksJob
{
EntityManager = entityManager,
Chunks = chunks
}.Run();
s_PlaybackManagedChangesMarker.Begin();
var access = entityManager.GetCheckedEntityDataAccess();
var ecs = access->EntityComponentStore;
var mcs = access->ManagedComponentStore;
mcs.Playback(ref ecs->ManagedChangesTracker);
s_PlaybackManagedChangesMarker.End();
s_DestroyChunksProfilerMarker.End();
}
/// <summary>
/// Generates a detailed change set for the world.
/// All entities to be considered for diffing must have the <see cref="EntityGuid"/> component with a unique value.
/// The resulting <see cref="EntityChanges"/> must be disposed when no longer needed.
/// </summary>
/// <param name="options">A set of options which can be toggled.</param>
/// <param name="allocator">The allocator to use for the results object.</param>
/// <returns>A Change set containing the differences between the two worlds.</returns>
public EntityChanges GetChanges(EntityManagerDifferOptions options, Allocator allocator)
{
s_GetChangesMarker.Begin();
var changes = EntityManagerDifferUtility.GetChanges(
m_SrcWorld.EntityManager,
m_SrcWorldEntityQuery,
m_ShadowWorld.EntityManager,
m_ShadowWorldEntityQuery,
m_TypeInfoStream,
options,
allocator);
s_GetChangesMarker.End();
return(changes);
}
/// <summary>
/// Generates a detailed change set between <see cref="srcEntityManager"/> and <see cref="dstEntityManager"/>.
/// All entities to be considered must have the <see cref="EntityGuid"/> component with a unique value.
/// The resulting <see cref="Entities.EntityChanges"/> must be disposed when no longer needed.
/// </summary>
/// <remarks>
/// When using the <see cref="EntityManagerDifferOptions.FastForwardShadowWorld"/> the destination world must be a direct ancestor to
/// the source world, and must only be updated using this call or similar methods. There should be no direct changes to destination world.
/// </remarks>
internal static EntityChanges GetChanges(
EntityManager srcEntityManager,
EntityManager dstEntityManager,
EntityManagerDifferOptions options,
EntityQueryDesc entityQueryDesc,
BlobAssetCache blobAssetCache,
Allocator allocator)
{
#if ENABLE_PROFILER || UNITY_EDITOR
s_GetChangesProfilerMarker.Begin();
#endif
CheckEntityGuidComponent(entityQueryDesc);
var changes = default(EntityChanges);
if (options == EntityManagerDifferOptions.None)
{
return(changes);
}
srcEntityManager.CompleteAllJobs();
dstEntityManager.CompleteAllJobs();
var srcEntityQuery = srcEntityManager.CreateEntityQuery(entityQueryDesc);
var dstEntityQuery = dstEntityManager.CreateEntityQuery(entityQueryDesc);
// Gather a set of a chunks to consider for diffing in both the src and dst worlds.
using (var srcChunks = srcEntityQuery.CreateArchetypeChunkArray(Allocator.TempJob, out var srcChunksJob))
using (var dstChunks = dstEntityQuery.CreateArchetypeChunkArray(Allocator.TempJob, out var dstChunksJob))
{
JobHandle clearMissingReferencesJob = default;
if (CheckOption(options, EntityManagerDifferOptions.ClearMissingReferences))
{
// Opt-in feature.
// This is a special user case for references to destroyed entities.
// If entity is destroyed, any references to that entity will remain set but become invalid (i.e. broken).
// This option ensures that references to non-existent entities will be explicitly set to Entity.Null which
// will force it to be picked up in the change set.
ClearMissingReferences(srcEntityManager, srcChunks, out clearMissingReferencesJob, srcChunksJob);
}
// @TODO NET_DOTS does not support JobHandle.CombineDependencies with 3 arguments.
#if NET_DOTS
var archetypeChunkChangesJobDependencies = CombineDependencies(srcChunksJob, dstChunksJob, clearMissingReferencesJob);
#else
var archetypeChunkChangesJobDependencies = JobHandle.CombineDependencies(srcChunksJob, dstChunksJob, clearMissingReferencesJob);
#endif
// Broad phased chunk comparison.
using (var archetypeChunkChanges = GetArchetypeChunkChanges(
srcChunks: srcChunks,
dstChunks: dstChunks,
allocator: Allocator.TempJob,
jobHandle: out var archetypeChunkChangesJob,
dependsOn: archetypeChunkChangesJobDependencies))
{
// Explicitly sync at this point to parallelize subsequent jobs by chunk.
archetypeChunkChangesJob.Complete();
// Gather a sorted set of entities based on which chunks have changes.
using (var srcEntities = GetSortedEntitiesInChunk(
archetypeChunkChanges.CreatedSrcChunks, Allocator.TempJob,
jobHandle: out var srcEntitiesJob))
using (var dstEntities = GetSortedEntitiesInChunk(
archetypeChunkChanges.DestroyedDstChunks, Allocator.TempJob,
jobHandle: out var dstEntitiesJob))
using (var srcBlobAssets = GetReferencedBlobAssets(
srcChunks, Allocator.TempJob,
jobHandle: out var srcBlobAssetsJob))
using (var dstBlobAssets = blobAssetCache.BlobAssetBatch->ToNativeList(Allocator.TempJob))
{
var duplicateEntityGuids = default(NativeList <DuplicateEntityGuid>);
var forwardEntityChanges = default(EntityInChunkChanges);
var reverseEntityChanges = default(EntityInChunkChanges);
var forwardComponentChanges = default(ComponentChanges);
var reverseComponentChanges = default(ComponentChanges);
var forwardBlobAssetChanges = default(BlobAssetChanges);
var reverseBlobAssetChanges = default(BlobAssetChanges);
try
{
JobHandle getDuplicateEntityGuidsJob = default;
JobHandle forwardChangesJob = default;
JobHandle reverseChangesJob = default;
if (CheckOption(options, EntityManagerDifferOptions.ValidateUniqueEntityGuid))
{
// Guid validation will happen incrementally and only consider changed entities in the source world.
duplicateEntityGuids = GetDuplicateEntityGuids(
srcEntities, Allocator.TempJob,
jobHandle: out getDuplicateEntityGuidsJob,
dependsOn: srcEntitiesJob);
}
if (CheckOption(options, EntityManagerDifferOptions.IncludeForwardChangeSet))
{
forwardEntityChanges = GetEntityInChunkChanges(
srcEntityManager,
dstEntityManager,
srcEntities,
dstEntities,
Allocator.TempJob,
jobHandle: out var forwardEntityChangesJob,
dependsOn: JobHandle.CombineDependencies(srcEntitiesJob, dstEntitiesJob));
forwardComponentChanges = GetComponentChanges(
forwardEntityChanges,
static void CloneAndAddChunks(EntityManager srcEntityManager, EntityManager dstEntityManager, NativeList <ArchetypeChunk> chunks)
{
s_CloneAndAddChunksProfilerMarker.Begin();
// sort chunks by archetype and clone chunks
var srcSharedComponentIndices = new NativeList <int>(128, Allocator.TempJob);
new CollectSharedComponentIndices
{
Chunks = chunks,
SharedComponentIndices = srcSharedComponentIndices,
}.Run();
// copy shared components
s_CopySharedComponentsMarker.Begin();
var srcAccess = srcEntityManager.GetCheckedEntityDataAccess();
var dstAccess = dstEntityManager.GetCheckedEntityDataAccess();
var srcManagedComponentStore = srcAccess->ManagedComponentStore;
var dstManagedComponentStore = dstAccess->ManagedComponentStore;
var dstSharedComponentIndicesRemapped = new NativeArray <int>(srcSharedComponentIndices, Allocator.TempJob);
dstManagedComponentStore.CopySharedComponents(srcManagedComponentStore, (int *)dstSharedComponentIndicesRemapped.GetUnsafeReadOnlyPtr(), dstSharedComponentIndicesRemapped.Length);
s_CopySharedComponentsMarker.End();
// clone chunks
var cloned = new NativeArray <ArchetypeChunk>(chunks.Length, Allocator.TempJob, NativeArrayOptions.UninitializedMemory);
new CreateNewChunks
{
Chunks = chunks,
ClonedChunks = cloned,
DstEntityManager = dstEntityManager,
SrcSharedComponentIndices = srcSharedComponentIndices,
DstSharedComponentIndices = dstSharedComponentIndicesRemapped,
}.Run();
var copyJob = new CopyChunkBuffers
{
Chunks = chunks,
ClonedChunks = cloned
}.Schedule(chunks.Length, default);
JobHandle.ScheduleBatchedJobs();
srcSharedComponentIndices.Dispose();
s_PlaybackManagedChangesMarker.Begin();
dstManagedComponentStore.Playback(ref dstAccess->EntityComponentStore->ManagedChangesTracker);
// Release any references obtained by CopySharedComponents above
for (var i = 0; i < dstSharedComponentIndicesRemapped.Length; i++)
{
dstAccess->RemoveSharedComponentReference(dstSharedComponentIndicesRemapped[i]);
}
s_PlaybackManagedChangesMarker.End();
dstSharedComponentIndicesRemapped.Dispose();
copyJob.Complete();
s_CopyManagedComponentsMarker.Begin();
for (int i = 0; i < cloned.Length; i++)
{
var dstChunk = cloned[i].m_Chunk;
var dstArchetype = dstChunk->Archetype;
var numManagedComponents = dstArchetype->NumManagedComponents;
var hasHybridComponents = dstArchetype->HasHybridComponents;
for (int t = 0; t < numManagedComponents; ++t)
{
int indexInArchetype = t + dstChunk->Archetype->FirstManagedComponent;
var offset = dstChunk->Archetype->Offsets[indexInArchetype];
var a = (int *)(dstChunk->Buffer + offset);
int count = dstChunk->Count;
if (hasHybridComponents)
{
// We consider hybrid components as always different, there's no reason to clone those at this point.
var typeCategory = TypeManager.GetTypeInfo(dstChunk->Archetype->Types[indexInArchetype].TypeIndex).Category;
if (typeCategory == TypeManager.TypeCategory.UnityEngineObject)
{
// We still need to patch their indices, because otherwise they might point to invalid memory in
// the managed component store. Setting them to the invalid index 0 is harmless, assuming nobody
// actually operates on the shadow world.
UnsafeUtility.MemSet(a, 0, sizeof(int) * count);
continue;
}
}
dstManagedComponentStore.CloneManagedComponentsFromDifferentWorld(a, count,
srcManagedComponentStore, ref *dstAccess->EntityComponentStore);
}
}
s_CopyManagedComponentsMarker.End();
// Ensure capacity in the dst world before we start linking entities.
dstAccess->EntityComponentStore->EnsureCapacity(srcEntityManager.EntityCapacity);
dstAccess->EntityComponentStore->CopyNextFreeEntityIndex(srcAccess->EntityComponentStore);
new PatchAndAddClonedChunks
{
SrcChunks = chunks,
DstChunks = cloned,
DstEntityComponentStore = dstAccess->EntityComponentStore
}.Schedule(chunks.Length, 64).Complete();
cloned.Dispose();
s_CloneAndAddChunksProfilerMarker.End();
}