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ACE_Static_Allocator_Base Class Reference

Defines a class that provided a highly optimized memory management scheme for allocating memory statically. More...

#include <Malloc_Allocator.h>

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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. More...
 
virtual void * calloc (size_t nbytes, char initial_value= '\0')
 Allocate nbytes, giving them initial_value. More...
 
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()). More...
 
virtual int remove (void)
 Remove any resources associated with this memory manager. 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...
 

Protected Member Functions

 ACE_Static_Allocator_Base (void)
 Don't allow direct instantiations of this class. More...
 

Protected Attributes

char * buffer_
 Pointer to the buffer. More...
 
size_t size_
 Size of the buffer. More...
 
size_t offset_
 Pointer to the current offset in the <buffer_>. 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...
 

Detailed Description

Defines a class that provided a highly optimized memory management scheme for allocating memory statically.

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.

Constructor & Destructor Documentation

ACE_Static_Allocator_Base::ACE_Static_Allocator_Base ( char *  buffer,
size_t  size 
)
inline
ACE_Static_Allocator_Base::ACE_Static_Allocator_Base ( void  )
protected

Don't allow direct instantiations of this class.

Member Function Documentation

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 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.

Implements ACE_Allocator.

void * ACE_Static_Allocator_Base::calloc ( size_t  nbytes,
char  initial_value = '\0' 
)
virtual

Allocate nbytes, giving them initial_value.

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::dump ( void  ) const
virtual

Dump the state of the object.

Implements ACE_Allocator.

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.

int ACE_Static_Allocator_Base::find ( const char *  name)
virtual

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

Implements ACE_Allocator.

void ACE_Static_Allocator_Base::free ( void *  ptr)
virtual

Free ptr (must have been allocated by ACE_Allocator::malloc()).

Implements ACE_Allocator.

void * ACE_Static_Allocator_Base::malloc ( size_t  nbytes)
virtual

Allocate nbytes, but don't give them any initial value.

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::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::remove ( void  )
virtual

Remove any resources associated with this memory manager.

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::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::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)
virtual

Unbind (remove) the name from the map. Don't return the pointer to 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.

Member Data Documentation

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.

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