ACE  6.4.2
Public Types | Public Member Functions | Static Public Member Functions | Static Private Attributes | List of all members
ACE_Allocator Class Referenceabstract

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>

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Public Types

typedef size_t size_type
 Unsigned integer type used for specifying memory block lengths. More...
 

Public Member Functions

 ACE_Allocator (void)
 "No-op" constructor (needed to make certain compilers happy). More...
 
virtual ~ACE_Allocator (void)
 Virtual destructor. More...
 
virtual void * malloc (size_type nbytes)=0
 Allocate nbytes, but don't give them any initial value. More...
 
virtual void * calloc (size_type nbytes, char initial_value= '\0')=0
 Allocate nbytes, giving them initial_value. More...
 
virtual void * calloc (size_type n_elem, size_type elem_size, char initial_value= '\0')=0
 
virtual void free (void *ptr)=0
 Free ptr (must have been allocated by ACE_Allocator::malloc()). More...
 
virtual int remove (void)=0
 Remove any resources associated with this memory manager. More...
 
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. More...
 
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_type len, int flags=MS_SYNC)=0
 
virtual int protect (ssize_t len=-1, int prot=PROT_RDWR)=0
 
virtual int protect (void *addr, size_type len, int prot=PROT_RDWR)=0
 
virtual void dump (void) const =0
 Dump the state of the object. More...
 

Static Public Member Functions

static ACE_Allocatorinstance (void)
 Get pointer to a default ACE_Allocator. More...
 
static ACE_Allocatorinstance (ACE_Allocator *)
 
static void close_singleton (void)
 Delete the dynamically allocated Singleton. More...
 

Static Private Attributes

static ACE_Allocatorallocator_ = 0
 Pointer to a process-wide ACE_Allocator instance. More...
 
static int delete_allocator_ = 0
 Must delete the <allocator_> if non-0. More...
 

Detailed Description

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

Member Typedef Documentation

typedef size_t ACE_Allocator::size_type

Unsigned integer type used for specifying memory block lengths.

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 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.

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

virtual void* ACE_Allocator::calloc ( size_type  nbytes,
char  initial_value = '\0' 
)
pure virtual
virtual void* ACE_Allocator::calloc ( size_type  n_elem,
size_type  elem_size,
char  initial_value = '\0' 
)
pure virtual

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

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

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_Allocator_Adapter< MALLOC >, ACE_Static_Allocator_Base, and ACE_New_Allocator.

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_Allocator_Adapter< MALLOC >, ACE_Static_Allocator_Base, and ACE_New_Allocator.

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

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

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

virtual void ACE_Allocator::free ( void *  ptr)
pure virtual
ACE_Allocator * ACE_Allocator::instance ( void  )
static

Get pointer to a default ACE_Allocator.

ACE_Allocator * ACE_Allocator::instance ( ACE_Allocator r)
static

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

virtual void* ACE_Allocator::malloc ( size_type  nbytes)
pure virtual
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_Allocator_Adapter< MALLOC >, ACE_Static_Allocator_Base, and ACE_New_Allocator.

virtual int ACE_Allocator::protect ( void *  addr,
size_type  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_Allocator_Adapter< MALLOC >, ACE_Static_Allocator_Base, and ACE_New_Allocator.

virtual int ACE_Allocator::remove ( void  )
pure virtual

Remove any resources associated with this memory manager.

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

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_Allocator_Adapter< MALLOC >, ACE_Static_Allocator_Base, and ACE_New_Allocator.

virtual int ACE_Allocator::sync ( void *  addr,
size_type  len,
int  flags = MS_SYNC 
)
pure virtual

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

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

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_Allocator_Adapter< MALLOC >, ACE_Static_Allocator_Base, and ACE_New_Allocator.

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_Allocator_Adapter< MALLOC >, ACE_Static_Allocator_Base, and ACE_New_Allocator.

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_Allocator_Adapter< MALLOC >, ACE_Static_Allocator_Base, and ACE_New_Allocator.

Member Data Documentation

ACE_Allocator * ACE_Allocator::allocator_ = 0
staticprivate

Pointer to a process-wide ACE_Allocator instance.

int ACE_Allocator::delete_allocator_ = 0
staticprivate

Must delete the <allocator_> if non-0.


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