ACE_Static_Allocator_Base Class Reference

Defines a class that provided a highly optimized memory management scheme for allocating memory statically. More...

#include <Malloc_Allocator.h>

Inheritance diagram for ACE_Static_Allocator_Base:

Collaboration diagram for ACE_Static_Allocator_Base:

List of all members.

Public Member Functions
	ACE_Static_Allocator_Base (char *buffer, size_t size)
virtual void *	malloc (size_t nbytes)
	Allocate nbytes, but don't give them any initial value.
virtual void *	calloc (size_t nbytes, char initial_value= '\0')
	Allocate nbytes, giving them initial_value.
virtual void *	calloc (size_t n_elem, size_t elem_size, char initial_value= '\0')
virtual void	free (void *ptr)
	Free ptr (must have been allocated by ACE_Allocator::malloc()).
virtual int	remove (void)
	Remove any resources associated with this memory manager.
virtual int	bind (const char *name, void *pointer, int duplicates=0)
virtual int	trybind (const char *name, void *&pointer)
virtual int	find (const char *name, void *&pointer)
virtual int	find (const char *name)
	Returns 0 if the name is in the mapping. -1, otherwise.
virtual int	unbind (const char *name)
virtual int	unbind (const char *name, void *&pointer)
virtual int	sync (ssize_t len=-1, int flags=MS_SYNC)
virtual int	sync (void *addr, size_t len, int flags=MS_SYNC)
virtual int	protect (ssize_t len=-1, int prot=PROT_RDWR)
virtual int	protect (void *addr, size_t len, int prot=PROT_RDWR)
virtual void	dump (void) const
	Dump the state of the object.
Protected Member Functions
	ACE_Static_Allocator_Base (void)
	Don't allow direct instantiations of this class.
Protected Attributes
char *	buffer_
	Pointer to the buffer.
size_t	size_
	Size of the buffer.
size_t	offset_
	Pointer to the current offset in the <buffer_>.

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Detailed Description

Defines a class that provided a highly optimized memory management scheme for allocating memory statically.

This class manages a fixed-size <POOL_SIZE> of memory. Every time <malloc>/<calloc> is called, it simply moves an internal index forward and returns a pointer to the requested chunk. All memory is allocated statically (typically via the ACE_Static_Allocator template) and <free> is a no-op. This behavior is useful for use-cases where all the memory allocation needs are known in advance and no deletions ever occur.

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Constructor & Destructor Documentation

ACE_Static_Allocator_Base::ACE_Static_Allocator_Base	(	char *	buffer,
		size_t	size
	)		[inline]

ACE_Static_Allocator_Base::ACE_Static_Allocator_Base

(

void

)

[protected]

Don't allow direct instantiations of this class.

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Member Function Documentation

int ACE_Static_Allocator_Base::bind	(	const char *	name,
		void *	pointer,
		int	duplicates = 0
	)		[virtual]

Associate name with pointer. If duplicates == 0 then do not allow duplicate name/pointer associations, else if duplicates != 0 then allow duplicate name/pointer associations. Returns 0 if successfully binds (1) a previously unbound name or (2) duplicates != 0, returns 1 if trying to bind a previously bound name and duplicates == 0, else returns -1 if a resource failure occurs.

Implements ACE_Allocator.

void * ACE_Static_Allocator_Base::calloc	(	size_t	nbytes,
		char	initial_value = '\0'
	)		[virtual]

Allocate nbytes, giving them initial_value.

Implements ACE_Allocator.

void * ACE_Static_Allocator_Base::calloc	(	size_t	n_elem,
		size_t	elem_size,
		char	initial_value = '\0'
	)		[virtual]

Allocate <n_elem> each of size elem_size, giving them initial_value.

Implements ACE_Allocator.

void ACE_Static_Allocator_Base::dump

(

void

)

const [virtual]

Dump the state of the object.

Implements ACE_Allocator.

int ACE_Static_Allocator_Base::find	(	const char *	name,
		void *&	pointer
	)		[virtual]

Locate name and pass out parameter via pointer. If found, return 0, returns -1 if failure occurs.

Implements ACE_Allocator.

int ACE_Static_Allocator_Base::find

(

const char *

name

)

[virtual]

Returns 0 if the name is in the mapping. -1, otherwise.

Implements ACE_Allocator.

void ACE_Static_Allocator_Base::free

(

void *

ptr

)

[virtual]

Free ptr (must have been allocated by ACE_Allocator::malloc()).

Implements ACE_Allocator.

void * ACE_Static_Allocator_Base::malloc

(

size_t

nbytes

)

[virtual]

Allocate nbytes, but don't give them any initial value.

Implements ACE_Allocator.

int ACE_Static_Allocator_Base::protect	(	ssize_t	len = -1,
		int	prot = PROT_RDWR
	)		[virtual]

Change the protection of the pages of the mapped region to prot starting at <this->base_addr_> up to len bytes. If len == -1 then change protection of all pages in the mapped region.

Implements ACE_Allocator.

int ACE_Static_Allocator_Base::protect	(	void *	addr,
		size_t	len,
		int	prot = PROT_RDWR
	)		[virtual]

Change the protection of the pages of the mapped region to prot starting at addr up to len bytes.

Implements ACE_Allocator.

int ACE_Static_Allocator_Base::remove

(

void

)

[virtual]

Remove any resources associated with this memory manager.

Implements ACE_Allocator.

int ACE_Static_Allocator_Base::sync	(	ssize_t	len = -1,
		int	flags = MS_SYNC
	)		[virtual]

Sync len bytes of the memory region to the backing store starting at this->base_addr_. If len == -1 then sync the whole region.

Implements ACE_Allocator.

int ACE_Static_Allocator_Base::sync	(	void *	addr,
		size_t	len,
		int	flags = MS_SYNC
	)		[virtual]

Sync len bytes of the memory region to the backing store starting at addr.

Implements ACE_Allocator.

int ACE_Static_Allocator_Base::trybind	(	const char *	name,
		void *&	pointer
	)		[virtual]

Associate name with pointer. Does not allow duplicate name/pointer associations. Returns 0 if successfully binds (1) a previously unbound name, 1 if trying to bind a previously bound name, or returns -1 if a resource failure occurs. When this call returns pointer's value will always reference the void * that name is associated with. Thus, if the caller needs to use pointer (e.g., to free it) a copy must be maintained by the caller.

Implements ACE_Allocator.

int ACE_Static_Allocator_Base::unbind

(

const char *

name

)

[virtual]

Unbind (remove) the name from the map. Don't return the pointer to the caller

Implements ACE_Allocator.

int ACE_Static_Allocator_Base::unbind	(	const char *	name,
		void *&	pointer
	)		[virtual]

Break any association of name. Returns the value of pointer in case the caller needs to deallocate memory.

Implements ACE_Allocator.

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Member Data Documentation

char* ACE_Static_Allocator_Base::buffer_ [protected]

Pointer to the buffer.

size_t ACE_Static_Allocator_Base::offset_ [protected]

Pointer to the current offset in the <buffer_>.

size_t ACE_Static_Allocator_Base::size_ [protected]

Size of the buffer.

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

• Malloc_Allocator.h
• Malloc_Allocator.cpp
• Malloc_Allocator.inl