typed_block< RawSize_, T_, NRef_, InfoType_ > Class Template Reference

Block containing elements of fixed length. More...

#include <mng.h>

Inheritance diagram for typed_block< RawSize_, T_, NRef_, InfoType_ >:

Collaboration diagram for typed_block< RawSize_, T_, NRef_, InfoType_ >:

List of all members.

Public Types
enum	{ raw_size = RawSize_, size = block_w_info<T_, RawSize_, NRef_, InfoType_>::size }
Public Types inherited from block_w_info< T_, RawSize_, NRef_, InfoType_ >
typedef InfoType_	info_type
	Type of per block information element.

Public Member Functions
request_ptr	write (const BID< raw_size > &bid, completion_handler on_cmpl=default_completion_handler())
	Writes block to the disk(s) !
request_ptr	read (const BID< raw_size > &bid, completion_handler on_cmpl=default_completion_handler())
	Reads block from the disk(s) !

Additional Inherited Members
Public Attributes inherited from block_w_info< T_, RawSize_, NRef_, InfoType_ >
info_type	info
	Per block information element.
Public Attributes inherited from block_w_bids< T_,((RawSize_-sizeof(BID< RawSize_ >)*NBids_-sizeof(InfoType_))/sizeof(T_)), RawSize_, NBids_ >
bid_type	ref [nbids]
	Array of BID references.
Public Attributes inherited from element_block< T_, Size_ >
T_	elem [size]
	Array of elements of type T.

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Detailed Description

template<unsigned RawSize_, class T_, unsigned NRef_ = 0, class InfoType_ = void>
class typed_block< RawSize_, T_, NRef_, InfoType_ >

Block containing elements of fixed length.

Template parameters:

• RawSize_ size of block in bytes
• T_ type of block's records
• NRef_ number of block references (BIDs) that can be stored in the block (default is 0)
• InfoType_ type of per block information (default is no information - void)

The data array of type T_ is contained in the parent class stxxl::element_block, see related information there. The BID array of references is contained in the parent class stxxl::block_w_bids, see related information there. The "per block information" is contained in the parent class stxxl::block_w_info, see related information there.

Warning:

If RawSize_ > 2MB object(s) of this type can not be allocated on the stack (as a function variable for example), because Linux POSIX library limits the stack size for the main thread to (2MB - system page size)

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Member Enumeration Documentation

template<unsigned RawSize_, class T_, unsigned NRef_ = 0, class InfoType_ = void>

anonymous enum

Enumerator:

raw_size	size of block in bytes
size	number of elements in block

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Member Function Documentation

template<unsigned RawSize_, class T_, unsigned NRef_ = 0, class InfoType_ = void>

request_ptr typed_block< RawSize_, T_, NRef_, InfoType_ >::read ( const BID< raw_size > &  bid, completion_handler  on_cmpl = default_completion_handler()  )

inline

Reads block from the disk(s) !

Parameters:

bid	block identifier, points the file(disk) and position !
on_cmpl	completion handler !

Returns:

pointer_ptr object to track status I/O operation after the call

template<unsigned RawSize_, class T_, unsigned NRef_ = 0, class InfoType_ = void>

request_ptr typed_block< RawSize_, T_, NRef_, InfoType_ >::write ( const BID< raw_size > &  bid, completion_handler  on_cmpl = default_completion_handler()  )

inline

Writes block to the disk(s) !

Parameters:

bid	block identifier, points the file(disk) and position !
on_cmpl	completion handler !

Returns:

pointer_ptr object to track status I/O operation after the call

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

• mng.h