ACE_Allocator Class Reference

Interface for a dynamic memory allocator that uses inheritance and dynamic binding to provide extensible mechanisms for allocating and deallocating memory. More...

#include <Malloc_Base.h>

Inheritance diagram for ACE_Allocator:

[legend]Collaboration diagram for ACE_Allocator:

[legend]List of all members.


Public Member Functions
	ACE_Allocator (void)
	"No-op" constructor (needed to make certain compilers happy).
virtual	~ACE_Allocator (void)
	Virtual destructor.
virtual void *	malloc (size_t nbytes)=0
	Allocate <nbytes>, but don't give them any initial value.
virtual void *	calloc (size_t nbytes, char initial_value= '\0')=0
	Allocate <nbytes>, giving them <initial_value>.
virtual void *	calloc (size_t n_elem, size_t elem_size, char initial_value= '\0')=0
virtual void	free (void *ptr)=0
	Free <ptr> (must have been allocated by <ACE_Allocator::malloc>).
virtual int	remove (void)=0
	Remove any resources associated with this memory manager.
virtual int	bind (const char name, void pointer, int duplicates=0)=0
virtual int	trybind (const char name, void &pointer)=0
virtual int	find (const char name, void &pointer)=0
virtual int	find (const char *name)=0
	Returns 0 if the name is in the mapping. -1, otherwise.
virtual int	unbind (const char *name)=0
virtual int	unbind (const char name, void &pointer)=0
virtual int	sync (ssize_t len=-1, int flags=MS_SYNC)=0
virtual int	sync (void *addr, size_t len, int flags=MS_SYNC)=0
virtual int	protect (ssize_t len=-1, int prot=PROT_RDWR)=0
virtual int	protect (void *addr, size_t len, int prot=PROT_RDWR)=0
virtual void	dump (void) const =0
	Dump the state of the object.
Static Public Member Functions
static ACE_Allocator *	instance (void)
	Get pointer to a default ACE_Allocator.
static ACE_Allocator *	instance (ACE_Allocator *)
static void	close_singleton (void)
	Delete the dynamically allocated Singleton.
Static Private Attributes
static ACE_Allocator *	allocator_ = 0
	Pointer to a process-wide ACE_Allocator instance.
static int	delete_allocator_ = 0
	Must delete the <allocator_> if non-0.

Detailed Description

Interface for a dynamic memory allocator that uses inheritance and dynamic binding to provide extensible mechanisms for allocating and deallocating memory.

Constructor & Destructor Documentation

ACE_Allocator::ACE_Allocator ( void )

"No-op" constructor (needed to make certain compilers happy).

ACE_Allocator::~ACE_Allocator ( void ) [virtual]

Virtual destructor.

Member Function Documentation

virtual int ACE_Allocator::bind	(	const char *	name,
		void *	pointer,
		int	duplicates = `0`
	)			`[pure 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> assocations. 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.

Implemented in ACE_New_Allocator, ACE_Static_Allocator_Base, and ACE_Allocator_Adapter< MALLOC >.

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

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

Implemented in ACE_New_Allocator, ACE_Static_Allocator_Base, ACE_Cached_Allocator< T, ACE_LOCK >, ACE_Dynamic_Cached_Allocator< ACE_LOCK >, and ACE_Allocator_Adapter< MALLOC >.

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

Allocate <nbytes>, giving them <initial_value>.

Implemented in ACE_New_Allocator, ACE_Static_Allocator_Base, ACE_Cached_Allocator< T, ACE_LOCK >, ACE_Dynamic_Cached_Allocator< ACE_LOCK >, and ACE_Allocator_Adapter< MALLOC >.

void ACE_Allocator::close_singleton ( void ) [static]

Delete the dynamically allocated Singleton.

virtual void ACE_Allocator::dump ( void ) const [pure virtual]

Dump the state of the object.

Implemented in ACE_New_Allocator, ACE_Static_Allocator_Base, and ACE_Allocator_Adapter< MALLOC >.

virtual int ACE_Allocator::find ( const char * name ) [pure virtual]

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

Implemented in ACE_New_Allocator, ACE_Static_Allocator_Base, and ACE_Allocator_Adapter< MALLOC >.

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

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

Implemented in ACE_New_Allocator, ACE_Static_Allocator_Base, and ACE_Allocator_Adapter< MALLOC >.

virtual void ACE_Allocator::free ( void * ptr ) [pure virtual]

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

Implemented in ACE_New_Allocator, ACE_Static_Allocator_Base, ACE_Cached_Allocator< T, ACE_LOCK >, ACE_Dynamic_Cached_Allocator< ACE_LOCK >, and ACE_Allocator_Adapter< MALLOC >.

ACE_Allocator * ACE_Allocator::instance ( ACE_Allocator * ) [static]

Set pointer to a process-wide ACE_Allocator and return existing pointer.

ACE_BEGIN_VERSIONED_NAMESPACE_DECL ACE_Allocator * ACE_Allocator::instance ( void ) [static]

Get pointer to a default ACE_Allocator.

virtual void* ACE_Allocator::malloc ( size_t nbytes ) [pure virtual]

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

Implemented in ACE_New_Allocator, ACE_Static_Allocator_Base, ACE_Cached_Allocator< T, ACE_LOCK >, ACE_Dynamic_Cached_Allocator< ACE_LOCK >, and ACE_Allocator_Adapter< MALLOC >.

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

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

Implemented in ACE_New_Allocator, ACE_Static_Allocator_Base, and ACE_Allocator_Adapter< MALLOC >.

virtual int ACE_Allocator::protect	(	ssize_t	len = `-1`,
		int	prot = `PROT_RDWR`
	)			`[pure 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.

Implemented in ACE_New_Allocator, ACE_Static_Allocator_Base, and ACE_Allocator_Adapter< MALLOC >.

virtual int ACE_Allocator::remove ( void ) [pure virtual]

Remove any resources associated with this memory manager.

Implemented in ACE_New_Allocator, ACE_Static_Allocator_Base, and ACE_Allocator_Adapter< MALLOC >.

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

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

Implemented in ACE_New_Allocator, ACE_Static_Allocator_Base, and ACE_Allocator_Adapter< MALLOC >.

virtual int ACE_Allocator::sync	(	ssize_t	len = `-1`,
		int	flags = `MS_SYNC`
	)			`[pure 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.

Implemented in ACE_New_Allocator, ACE_Static_Allocator_Base, and ACE_Allocator_Adapter< MALLOC >.

virtual int ACE_Allocator::trybind	(	const char *	name,
		void *&	pointer
	)			`[pure 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.

Implemented in ACE_New_Allocator, ACE_Static_Allocator_Base, and ACE_Allocator_Adapter< MALLOC >.