1. Epic GamesDeveloper
  3. FMemoryChunk

FMemoryChunk

Contains information of a single allocation or free block.

API > API/Runtime > API/Runtime/RHI > API/Runtime/RHI/FGPUDefragAllocator

References

   
Module RHI
Header /Engine/Source/Runtime/RHI/Public/GPUDefragAllocator.h
Include #include "GPUDefragAllocator.h"

Syntax

class FMemoryChunk

Remarks

Contains information of a single allocation or free block.

Variables

  Type Name Description
Public variable uint8 * Base Base of chunk.
Public variable FGPUDefragAllocator & BestFitAllocator Allows access to FBestFitAllocator members such as FirstChunk, FirstFreeChunk and LastChunk.
Public variable bool bIsAvailable Whether the chunk is available.
Public variable bool bTail  
Public variable uint16 DefragCounter Defrag counter. If this chunk failed to defrag, it won't try it again until the counter is 0.
Public variable int32 LockCount Whether the chunk has been locked.
Public variable FMemoryChunk * NextChunk Pointer to next chunk.
Public variable FMemoryChunk * NextFreeChunk Pointer to next free chunk.
Public variable int64 OrigSize  
Public variable FMemoryChunk * PreviousChunk Pointer to previous chunk.
Public variable FMemoryChunk * PreviousFreeChunk Pointer to previous free chunk.
Public variable int64 Size Size of chunk.
Public variable TStatId Stat Stat associated with this allocation
Public variable uint32 SyncIndex SyncIndex that must be exceeded before accessing the data within this chunk.
Public variable int64 SyncSize Number of uint8s covered by the SyncIndex (starting from the beginning of the chunk).
Public variable void * UserPayload User payload, e.g. platform-specific texture Pointer. Only chunks with payload can be relocated.

Constructors

  Type Name Description
Public function  

FMemoryChunk ( uint8* InBase,
int64 InSize,
FGPUDefragAllocator& InBestFitAllocator,
FMemoryChunk*& ChunkToInsertAfter,
TStatId InStat
)

 Private constructor.

Destructors

  Type Name Description
Public function   Unlinks/ removes the chunk from the linked lists it belongs to.

Functions

  Type Name Description
Public function Static uint64

Compare ( const FMemoryChunk* A,
const FMemoryChunk* B
)

 Comparison function for Sort(), etc, based on increasing base address.
Public function Const int64 Returns the number of uint8s that can be allocated from this chunk.
Public function Const int64 Returns the current size (in uint8s), or the final size if it has a reallocating request.
Public function Const uint32 Returns the relocation sync index.
Public function Const bool  
Public function Const bool Returns true if the Chunk is being asynchronously relocated due to reallocation or defrag.
Public function void

Link ( FMemoryChunk*& ChunkToInsertAfter
)

 Inserts this chunk after the passed in one.
Public function void

LinkFree ( FMemoryChunk* FirstFreeChunkToSearch
)

 Inserts this chunk at the head of the free chunk list.
Public function void

SetSyncIndex ( uint32 InSyncIndex,
int64 InSyncSize
)

 Sets the relocation sync index.
Public function void

Unlink ()

 Removes itself for linked list.
Public function void Removes itself for linked "free" list. Maint32ains the free-list order.

Ask questions and help your peers Developer Forums

Write your own tutorials or read those from others Learning Library

On this page