Binlog_iterator_ctx::Passthrough_allocator Class Reference

This is a passthrough allocator. More...

Public Types
enum	{ DELEGATE_MEMORY_TO_EVENT_OBJECT = false }
	Do not delegate the memory to the event as that may have the event deallocate it at the destructor. More...

Public Member Functions
unsigned char *	allocate (size_t size)
void	deallocate (unsigned char *ptr)
void	set_context (Binlog_iterator_ctx *ctx)

Private Attributes
Binlog_iterator_ctx *	m_ctx {nullptr}

Detailed Description

This is a passthrough allocator.

This allocator returns the buffer referenced in the context always. If the reader requests more memory to be allocated and the memory requested exceeds the capacity of the buffer in use, the allocator will return nullptr, meaning that the buffer is insufficient to store the next event. This causes the reader to fail with MEM_ALLOCATE error.

Member Enumeration Documentation

anonymous enum

anonymous enum

Do not delegate the memory to the event as that may have the event deallocate it at the destructor.

We do not want that.

Enumerator
DELEGATE_MEMORY_TO_EVENT_OBJECT

Member Function Documentation

allocate()

unsigned char * Binlog_iterator_ctx::Passthrough_allocator::allocate ( size_t  size )

inline

deallocate()

void Binlog_iterator_ctx::Passthrough_allocator::deallocate ( unsigned char *  ptr )

inline

set_context()

void Binlog_iterator_ctx::Passthrough_allocator::set_context ( Binlog_iterator_ctx *  ctx )

inline

Member Data Documentation

m_ctx

Binlog_iterator_ctx* Binlog_iterator_ctx::Passthrough_allocator::m_ctx {nullptr}

private

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The documentation for this class was generated from the following file:

• sql/binlog/services/iterator/file_storage.cc