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  3. FMallocBinned2

FMallocBinned2

Optimized virtual memory allocator.

API > API/Runtime > API/Runtime/Core > API/Runtime/Core/HAL

Inheritance Hierarchy

References

   
Module Core
Header /Engine/Source/Runtime/Core/Public/HAL/MallocBinned2.h
Include #include "HAL/MallocBinned2.h"

Syntax

class FMallocBinned2 : public FMalloc

Remarks

Optimized virtual memory allocator.

Constructors

  Type Name Description
Public function    

Destructors

  Type Name Description
Public function Virtual    

Functions

  Type Name Description
Public function uint32

BoundSizeToPoolIndex ( SIZE_T Size
)

  
Public function Const void

CanaryFail ( const FFreeBlock* Block
)

  
Public function Const void

CanaryTest ( const FFreeBlock* Block
)

  
Public function void  
Public function void

FreeExternal ( void* Ptr
)

  
Public function void

FreeInline ( void* Ptr
)

  
Public function bool

GetAllocationSizeExternal ( void* Ptr,
SIZE_T& SizeOut
)

  
Public function Const int64  
Public function void *

MallocExternalLarge ( SIZE_T Size,
uint32 Alignment
)

  
Public function void *

MallocExternalSmall ( SIZE_T Size,
uint32 Alignment
)

  
Public function void *

MallocInline ( SIZE_T Size,
uint32 Alignment
)

  
Public function void *

MallocSelect ( SIZE_T Size,
uint32 Alignment
)

  
Public function uint32

PoolIndexToBlockSize ( uint32 PoolIndex
)

  
Public function void *

ReallocExternal ( void* Ptr,
SIZE_T NewSize,
uint32 Alignment
)

  
Public function void *

ReallocInline ( void* Ptr,
SIZE_T NewSize,
uint32 Alignment
)

  
Public function Static bool

UseSmallAlloc ( SIZE_T Size,
uint32 Alignment
)

  

Overridden from FMalloc

  Type Name Description
Public function Virtual void Clears the TLS caches on the current thread and disables any future caching.
Public function Virtual void Dumps current allocator stats to the log.
Public function Virtual void

Free ( void* Original
)

 Free
Public function Virtual bool

GetAllocationSize ( void* Original,
SIZE_T& SizeOut
)

 If possible determine the size of the memory allocated at the given address
Public function Virtual void Writes allocator stats from the last update into the specified destination.
Public function Virtual const TCHAR * Gets descriptive name for logging purposes.
Public function Virtual Const bool Returns if the allocator is guaranteed to be thread-safe and therefore doesn't need a unnecessary thread-safety wrapper around it.
Public function Virtual void *

Malloc ( SIZE_T Count,
uint32 Alignment
)

 Malloc
Public function Virtual void Notifies the malloc implementation that initialization of all allocators in GMalloc is complete, so it's safe to initialize any extra features that require "regular" allocations
Public function Virtual void Notifies the malloc implementation that the process has forked so we can try and avoid dirtying pre-fork pages.
Public function Virtual void Notifies the malloc implementation that the process is about to fork.
Public function Virtual SIZE_T

QuantizeSize ( SIZE_T Count,
uint32 Alignment
)

 For some allocators this will return the actual size that should be requested to eliminate internal fragmentation.
Public function Virtual void *

Realloc ( void* Original,
SIZE_T Count,
uint32 Alignment
)

 Realloc
Public function Virtual void Set up TLS caches on the current thread. These are the threads that we can trim.
Public function Virtual void

Trim ( bool bTrimThreadCaches
)

 Releases as much memory as possible. Must be called from the main thread.
Public function Virtual void Called once per frame, gathers and sets all memory allocator statistics into the corresponding stats.
Public function Virtual bool Validates the allocator's heap

Classes

  Type Name Description
Public struct FPoolInfo    
Public struct PoolHashBucket Hash table struct for retrieving allocation book keeping information  
Public struct Private    

Constants

Name Description
Binned2TlsSlot  
CurrentCanary  
MallocBinned2  
MemSizeToIndex Mapping of sizes to small table indices.
OsAllocationGranularity  
PageSize  
SmallBlockSizesReversed  

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