---

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]List of all members.

Public Methods
	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 Methods
ACE_Allocator *	instance (void)
	Get pointer to a default <ACE_Allocator>.
ACE_Allocator *	instance (ACE_Allocator *)
void	close_singleton (void)
	Delete the dynamically allocated Singleton.
Static Private Attributes
ACE_Allocator *	allocator_ = 0
	Pointer to a process-wide <ACE_Allocator> instance.
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, ACE_Allocator_Adapter< MALLOC >, and ACE_Allocator_Adapter< ACE_Malloc< ACE_MEM_POOL_2, ACE_LOCK > >.

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 >, ACE_Allocator_Adapter< MALLOC >, and ACE_Allocator_Adapter< ACE_Malloc< ACE_MEM_POOL_2, ACE_LOCK > >.

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 >, ACE_Allocator_Adapter< MALLOC >, and ACE_Allocator_Adapter< ACE_Malloc< ACE_MEM_POOL_2, ACE_LOCK > >.

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, ACE_Allocator_Adapter< MALLOC >, and ACE_Allocator_Adapter< ACE_Malloc< ACE_MEM_POOL_2, ACE_LOCK > >.

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, ACE_Allocator_Adapter< MALLOC >, and ACE_Allocator_Adapter< ACE_Malloc< ACE_MEM_POOL_2, ACE_LOCK > >.

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, ACE_Allocator_Adapter< MALLOC >, and ACE_Allocator_Adapter< ACE_Malloc< ACE_MEM_POOL_2, ACE_LOCK > >.

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 >, ACE_Allocator_Adapter< MALLOC >, and ACE_Allocator_Adapter< ACE_Malloc< ACE_MEM_POOL_2, ACE_LOCK > >.

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

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

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 >, ACE_Allocator_Adapter< MALLOC >, and ACE_Allocator_Adapter< ACE_Malloc< ACE_MEM_POOL_2, ACE_LOCK > >.

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, ACE_Allocator_Adapter< MALLOC >, and ACE_Allocator_Adapter< ACE_Malloc< ACE_MEM_POOL_2, ACE_LOCK > >.

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, ACE_Allocator_Adapter< MALLOC >, and ACE_Allocator_Adapter< ACE_Malloc< ACE_MEM_POOL_2, ACE_LOCK > >.

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, ACE_Allocator_Adapter< MALLOC >, and ACE_Allocator_Adapter< ACE_Malloc< ACE_MEM_POOL_2, ACE_LOCK > >.

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, ACE_Allocator_Adapter< MALLOC >, and ACE_Allocator_Adapter< ACE_Malloc< ACE_MEM_POOL_2, ACE_LOCK > >.

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, ACE_Allocator_Adapter< MALLOC >, and ACE_Allocator_Adapter< ACE_Malloc< ACE_MEM_POOL_2, ACE_LOCK > >.

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, ACE_Allocator_Adapter< MALLOC >, and ACE_Allocator_Adapter< ACE_Malloc< ACE_MEM_POOL_2, ACE_LOCK > >.

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

Break any association of name. Returns the value of pointer in case the caller needs to deallocate memory. Implemented in ACE_New_Allocator, ACE_Static_Allocator_Base, ACE_Allocator_Adapter< MALLOC >, and ACE_Allocator_Adapter< ACE_Malloc< ACE_MEM_POOL_2, ACE_LOCK > >.

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

Unbind (remove) the name from the map. Don't return the pointer to the caller Implemented in ACE_New_Allocator, ACE_Static_Allocator_Base, ACE_Allocator_Adapter< MALLOC >, and ACE_Allocator_Adapter< ACE_Malloc< ACE_MEM_POOL_2, ACE_LOCK > >.

---

Member Data Documentation

ACE_Allocator * ACE_Allocator::allocator_ = 0 [static, private]

Pointer to a process-wide <ACE_Allocator> instance. Reimplemented in ACE_Allocator_Adapter< MALLOC >, and ACE_Allocator_Adapter< ACE_Malloc< ACE_MEM_POOL_2, ACE_LOCK > >.

int ACE_Allocator::delete_allocator_ = 0 [static, private]

Must delete the <allocator_> if non-0.

---

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

• Malloc_Base.h
• Malloc.cpp
• Malloc_Allocator.cpp

---