CxxUtils::pointer_list_base::allocator Class Reference

Very simple allocator for use with pointer_list. More...

#include <pointer_list.h>

Inheritance diagram for CxxUtils::pointer_list_base::allocator:

List of all members.

Classes
struct	chunk
	One memory allocation chunk.
Public Member Functions
	allocator (size_t nelt, size_t nblock, unsigned long end_mask, unsigned long end_offs)
	Constructor.
	~allocator ()
	Destructor. Deletes all blocks from this allocator.
list_block *	allocate ()
	Allocate a new block.
size_t	nelt () const
size_t	nchunks () const
	Return the current number of allocated chunks.
bool	at_end (const void *p) const
	Test if P is pointing at the end-pointer of a block.

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Detailed Description

Very simple allocator for use with pointer_list.

We allocate large chunks and divide them up into list_block's. We don't support deleting individual elements; instead, everything is deleted when the allocator is. The chunks are chained together to allow for this.

The total size of a block should be a power of two, and blocks must be aligned to this boundary.

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Constructor & Destructor Documentation

CxxUtils::pointer_list_base::allocator::allocator	(	size_t	nelt,
		size_t	nblock,
		unsigned long	end_mask,
		unsigned long	end_offs
	)

Constructor.

Parameters:

	nelt	Number of pointers per block (excluding the end pointer). Must be one less than a power of two.
	nblock	Number of blocks to allocate per chunk.
	end_mask	Mask to use for end-of-block test.
	end_offs	Offset to use for end-of-block test.
	nelt	Number of pointers per block. (excluding the end pointer).
	nblock	Number of blocks to allocate per chunk.
	end_mask	Mask to use for end-of-block test.
	end_offs	Offset to use for end-of-block test.

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Member Function Documentation

bool CxxUtils::pointer_list_base::allocator::at_end

(

const void *

p

)

const [inline]

Test if P is pointing at the end-pointer of a block.

Test to see if we're looking at the end of a block.

Parameters:

p

The pointer to test.

size_t CxxUtils::pointer_list_base::allocator::nchunks

(

)

const [inline]

Return the current number of allocated chunks.

Current number of allocated chunks.

size_t CxxUtils::pointer_list_base::allocator::nelt

(

)

const [inline]

Return the number of pointers per block (excluding the end-pointer).

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

• /cvmfs/atlas.cern.ch/repo/sw/ASG/AnalysisBase/2.4.28/CxxUtils/CxxUtils/pointer_list.h
• /cvmfs/atlas.cern.ch/repo/sw/ASG/AnalysisBase/2.4.28/CxxUtils/CxxUtils/pointer_list.icc
• /cvmfs/atlas.cern.ch/repo/sw/ASG/AnalysisBase/2.4.28/CxxUtils/Root/pointer_list.cxx