# 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:

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Collaboration diagram for ACE_Allocator:

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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

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_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 >, 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_BEGIN_VERSIONED_NAMESPACE_DECL 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