ustl::memblock Class Reference
[Memory Management]

Allocated memory block. More...

#include <ustl.h>

Inheritance diagram for ustl::memblock:

List of all members.

Public Member Functions
	memblock (void)
	Allocates 0 bytes for the internal block.
	memblock (const void *p, size_type n)
	links to p, n. Data can not be modified and will not be freed.
	memblock (size_type n)
	Allocates n bytes for the internal block.
	memblock (const cmemlink &b)
	Links to what b is linked to.
	memblock (const memlink &b)
	Links to what b is linked to.
	memblock (const memblock &b)
	Links to what b is linked to.
virtual	~memblock (void)
const memblock &	operator= (const cmemlink &b)
	Allocates enough space and copies the contents of b.
const memblock &	operator= (const memlink &b)
	Allocates enough space and copies the contents of b.
const memblock &	operator= (const memblock &b)
	Allocates enough space and copies the contents of b.
void	assign (const void *p, size_type n)
	Copies data from p, n.
void	assign (const cmemlink &l)
	Copies data from l.
void	swap (memblock &l)
	Swaps the contents with l.
void	reserve (size_type newSize, bool bExact=true)
void	resize (size_type newSize, bool bExact=true)
	resizes the block to newSize bytes, reallocating if necessary.
iterator	insert (iterator start, size_type size)
	Shifts the data in the linked block from start to start + n.
iterator	erase (iterator start, size_type size)
	Shifts the data in the linked block from start + n to start.
void	pop_back (void)
	Removes the last element (elementSize() bytes).
void	clear (void)
	Resizes the block to 0.
void	deallocate (void)
	Frees internal data.
void	manage (void *p, size_type n)
void	manage (memlink &l)
	Assumes control over block pointed to by l.
size_type	capacity (void) const
	Returns the number of bytes allocated.
virtual void	unlink (void)
	Unlinks object.
size_type	max_size (void) const
	Returns the maximum possible size of the block.
void	read (istream &is)
	Reads the object from stream s.
void	read_file (const char *filename)
	Reads the entire file "filename".
bool	is_linked (void) const
	Returns true if the storage is linked, false if allocated.
Static Public Attributes
const size_type	c_PageSize = 64
	The default minimum allocation unit.
Protected Member Functions
virtual size_type	minimumFreeCapacity (void) const

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Detailed Description

Allocated memory block.

Adds memory management capabilities to memlink. Uses malloc and realloc to maintain the internal pointer, but only if allocated using members of this class, or if linked to using the Manage() member function. Managed memory is automatically freed in the destructor.

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Constructor & Destructor Documentation

ustl::memblock::~memblock (  void   )  [virtual]

Frees internal data, if appropriate Only if the block was allocated using resize, or linked to using Manage, will it be freed. Also, Derived classes should call DestructBlock from their destructor, because upstream virtual functions are unavailable at this point and will not be called automatically.

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Member Function Documentation

void ustl::memblock::manage (  void *  p, size_type  n )

Assumes control of the memory block p of size n. The block assigned using this function will be freed in the destructor.

void ustl::memblock::reserve (  size_type  newSize, bool  bExact = true )

Reallocates internal block to hold at least newSize bytes. Some additional memory may be allocated, but for efficiency it is a very good idea to call reserve before doing byte-by-byte edit operations. The block size as returned by size() is not altered. reserve will not reduce allocated memory. If you think you are wasting space, call deallocate and start over. To avoid wasting space, use the block for only one purpose, and try to get that purpose to use similar amounts of memory on each iteration.

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

• memblock.h
• memblock.cc

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