ssm_sort::object_t Class Reference
[Sorting]

Inherits smlevel_top.

Collaboration diagram for ssm_sort::object_t:

[legend]List of all members.

---

Detailed Description

Handle on a record in the buffer pool or in scratch memory.

The ss_m::sort_file function calls a variety of user-defined callback functions to process records in the buffer pool or in-memory copies of records and to produce more of the same.

This class provides a generic handle to reference the records or copies of records, since the callbacks need only to

• know the header length
• find the data at an offset in the header
• know the body length
• find the data at an offset in the body
• copy a generic handle
• copy out a portion of the header or body to a buffer
• create a new generic handle from a pair of buffer

An object_t created from buffers must also know how the buffers were allocated so it can free the buffers to the same heap, so it keeps a reference to the factory_t used by the callback function to create the buffers.

Definition at line 312 of file sort_s.h.

Public Member Functions
NORET	object_t (const object_t &o)
NORET	object_t (const void *hdr, smsize_t hdrlen, factory_t &hf, const void *body, smsize_t bodylen, factory_t &bf)
bool	is_valid () const
bool	is_in_buffer_pool () const
smsize_t	hdr_size () const
smsize_t	body_size () const
Protected Member Functions
void	_callback_prologue () const
void	_callback_epilogue () const
void	_invalidate ()
Protected Attributes
int	_save_pin_count

---

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

• src/sm/sort_s.h

---