ACE
6.3.3
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A size-based allocator that caches blocks for quicker access. More...
#include <Malloc_T.h>
Public Member Functions | |
ACE_Dynamic_Cached_Allocator (size_t n_chunks, size_t chunk_size) | |
~ACE_Dynamic_Cached_Allocator (void) | |
Clear things up. More... | |
void * | malloc (size_t nbytes=0) |
virtual void * | calloc (size_t nbytes, char initial_value= '\0') |
virtual void * | calloc (size_t n_elem, size_t elem_size, char initial_value= '\0') |
void | free (void *) |
Return a chunk of memory back to free list cache. More... | |
size_t | pool_depth (void) |
Return the number of chunks available in the cache. More... | |
Public Member Functions inherited from ACE_New_Allocator | |
virtual int | remove (void) |
These methods are no-ops. More... | |
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. More... | |
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. More... | |
Public Member Functions inherited from ACE_Allocator | |
ACE_Allocator (void) | |
"No-op" constructor (needed to make certain compilers happy). More... | |
virtual | ~ACE_Allocator (void) |
Virtual destructor. More... | |
Private Attributes | |
char * | pool_ |
ACE_Locked_Free_List< ACE_Cached_Mem_Pool_Node< char >, ACE_LOCK > | free_list_ |
size_t | chunk_size_ |
Remember the size of our chunks. More... | |
Additional Inherited Members | |
Public Types inherited from ACE_Allocator | |
typedef size_t | size_type |
Unsigned integer type used for specifying memory block lengths. More... | |
Static Public Member Functions inherited from ACE_Allocator | |
static ACE_Allocator * | instance (void) |
Get pointer to a default ACE_Allocator. More... | |
static ACE_Allocator * | instance (ACE_Allocator *) |
static void | close_singleton (void) |
Delete the dynamically allocated Singleton. More... | |
A size-based allocator that caches blocks for quicker access.
This class enables caching of dynamically allocated, fixed-size chunks. Notice that the chunk_size
must be greater than or equal to sizeof (void*)
for this to work properly.
This class can be configured flexibly with different types of ACE_LOCK strategies that support the ACE_Thread_Mutex and ACE_Process_Mutex constructor API.
ACE_Dynamic_Cached_Allocator< ACE_LOCK >::ACE_Dynamic_Cached_Allocator | ( | size_t | n_chunks, |
size_t | chunk_size | ||
) |
Create a cached memory pool with n_chunks chunks each with chunk_size size.
ACE_Dynamic_Cached_Allocator< ACE_LOCK >::~ACE_Dynamic_Cached_Allocator | ( | void | ) |
Clear things up.
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virtual |
Get a chunk of memory from free list cache, giving them initial_value. Note that nbytes is only checked to make sure that it's less or equal to chunk_size, and is otherwise ignored since calloc() always returns a pointer to an item of chunk_size.
Reimplemented from ACE_New_Allocator.
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virtual |
This method is a no-op and just returns 0 since the free list only works with fixed sized entities.
Reimplemented from ACE_New_Allocator.
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virtual |
Return a chunk of memory back to free list cache.
Reimplemented from ACE_New_Allocator.
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virtual |
Get a chunk of memory from free list cache. Note that nbytes is only checked to make sure that it's less or equal to chunk_size, and is otherwise ignored since malloc() always returns a pointer to an item of chunk_size size.
Reimplemented from ACE_New_Allocator.
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inline |
Return the number of chunks available in the cache.
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private |
Remember the size of our chunks.
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private |
Maintain a cached memory free list. We use char
as template parameter, although sizeof(char) is usually less than sizeof(void*). Really important is that chunk_size must be greater or equal to sizeof(void*).
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private |
Remember how we allocate the memory in the first place so we can clear things up later.