#include <Malloc_Allocator.h>
Public Member Functions | |
ACE_Static_Allocator_Base (char *buffer, size_t size) | |
virtual void * | malloc (size_t nbytes) |
Allocate nbytes, but don't give them any initial value. | |
virtual void * | calloc (size_t nbytes, char initial_value= '\0') |
Allocate nbytes, giving them initial_value. | |
virtual void * | calloc (size_t n_elem, size_t elem_size, char initial_value= '\0') |
virtual void | free (void *ptr) |
Free <ptr> (must have been allocated by <ACE_Allocator::malloc>). | |
virtual int | remove (void) |
Remove any resources associated with this memory manager. | |
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. | |
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. | |
Protected Member Functions | |
ACE_Static_Allocator_Base (void) | |
Don't allow direct instantiations of this class. | |
Protected Attributes | |
char * | buffer_ |
Pointer to the buffer. | |
size_t | size_ |
Size of the buffer. | |
size_t | offset_ |
Pointer to the current offset in the <buffer_>. |
This class manages a fixed-size <POOL_SIZE> of memory. Every time <malloc>/<calloc> is called, it simply moves an internal index forward and returns a pointer to the requested chunk. All memory is allocated statically (typically via the ACE_Static_Allocator template) and <free> is a no-op. This behavior is useful for use-cases where all the memory allocation needs are known in advance and no deletions ever occur.
ACE_Static_Allocator_Base::ACE_Static_Allocator_Base | ( | char * | buffer, | |
size_t | size | |||
) |
ACE_Static_Allocator_Base::ACE_Static_Allocator_Base | ( | void | ) | [protected] |
Don't allow direct instantiations of this class.
int ACE_Static_Allocator_Base::bind | ( | const char * | name, | |
void * | pointer, | |||
int | duplicates = 0 | |||
) | [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.
Implements ACE_Allocator.
void * ACE_Static_Allocator_Base::calloc | ( | size_t | n_elem, | |
size_t | elem_size, | |||
char | initial_value = '\0' | |||
) | [virtual] |
Allocate <n_elem> each of size elem_size, giving them initial_value.
Implements ACE_Allocator.
void * ACE_Static_Allocator_Base::calloc | ( | size_t | nbytes, | |
char | initial_value = '\0' | |||
) | [virtual] |
void ACE_Static_Allocator_Base::dump | ( | void | ) | const [virtual] |
int ACE_Static_Allocator_Base::find | ( | const char * | name | ) | [virtual] |
int ACE_Static_Allocator_Base::find | ( | const char * | name, | |
void *& | pointer | |||
) | [virtual] |
Locate name and pass out parameter via pointer. If found, return 0, returns -1 if failure occurs.
Implements ACE_Allocator.
void ACE_Static_Allocator_Base::free | ( | void * | ptr | ) | [virtual] |
void * ACE_Static_Allocator_Base::malloc | ( | size_t | nbytes | ) | [virtual] |
int ACE_Static_Allocator_Base::protect | ( | void * | addr, | |
size_t | len, | |||
int | prot = PROT_RDWR | |||
) | [virtual] |
Change the protection of the pages of the mapped region to prot starting at addr up to len bytes.
Implements ACE_Allocator.
int ACE_Static_Allocator_Base::protect | ( | ssize_t | len = -1 , |
|
int | prot = PROT_RDWR | |||
) | [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.
Implements ACE_Allocator.
int ACE_Static_Allocator_Base::remove | ( | void | ) | [virtual] |
int ACE_Static_Allocator_Base::sync | ( | void * | addr, | |
size_t | len, | |||
int | flags = MS_SYNC | |||
) | [virtual] |
Sync len bytes of the memory region to the backing store starting at addr.
Implements ACE_Allocator.
int ACE_Static_Allocator_Base::sync | ( | ssize_t | len = -1 , |
|
int | flags = MS_SYNC | |||
) | [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.
Implements ACE_Allocator.
int ACE_Static_Allocator_Base::trybind | ( | const char * | name, | |
void *& | pointer | |||
) | [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.
Implements ACE_Allocator.
int ACE_Static_Allocator_Base::unbind | ( | const char * | name, | |
void *& | pointer | |||
) | [virtual] |
Break any association of name. Returns the value of pointer in case the caller needs to deallocate memory.
Implements ACE_Allocator.
int ACE_Static_Allocator_Base::unbind | ( | const char * | name | ) | [virtual] |
Unbind (remove) the name from the map. Don't return the pointer to the caller
Implements ACE_Allocator.
char* ACE_Static_Allocator_Base::buffer_ [protected] |
Pointer to the buffer.
size_t ACE_Static_Allocator_Base::offset_ [protected] |
Pointer to the current offset in the <buffer_>.
size_t ACE_Static_Allocator_Base::size_ [protected] |
Size of the buffer.