POSIX Shared Memory Private Support

Files
file	shm.c
	POSIX Shared Memory Information with Zero Objects.

Data Structures
struct	POSIX_Shm_Object
	Encapsulation for the storage and manipulation of shm objects. More...
struct	POSIX_Shm_Object_operations
	Operations on POSIX Shared Memory Objects. More...
struct	POSIX_Shm_Control
	Control for a POSIX Shared Memory Object. More...

Macros
#define	POSIX_SHM_INFORMATION_DEFINE(max)
	Macro to define the objects information for the POSIX Shared Memory objects. More...

Typedefs
typedef struct POSIX_Shm_Object_operations	POSIX_Shm_Object_operations

Functions
int	_POSIX_Shm_Object_create_from_workspace (POSIX_Shm_Object *shm_obj, size_t size)
	object_create operation for shm objects stored in RTEMS Workspace.
int	_POSIX_Shm_Object_delete_from_workspace (POSIX_Shm_Object *shm_obj)
	object_delete operation for shm objects stored in RTEMS Workspace.
int	_POSIX_Shm_Object_resize_from_workspace (POSIX_Shm_Object *shm_obj, size_t size)
	object_resize operation for shm objects stored in RTEMS Workspace.
int	_POSIX_Shm_Object_read_from_workspace (POSIX_Shm_Object *shm_obj, void *buf, size_t count)
	object_read operation for shm objects stored in RTEMS Workspace.
void *	_POSIX_Shm_Object_mmap_from_workspace (POSIX_Shm_Object *shm_obj, size_t len, int prot, off_t off)
	object_mmap operation for shm objects stored in RTEMS Workspace.
int	_POSIX_Shm_Object_create_from_heap (POSIX_Shm_Object *shm_obj, size_t size)
	object_create operation for shm objects stored in C program heap.
int	_POSIX_Shm_Object_delete_from_heap (POSIX_Shm_Object *shm_obj)
	object_delete operation for shm objects stored in C program heap.
int	_POSIX_Shm_Object_resize_from_heap (POSIX_Shm_Object *shm_obj, size_t size)
	object_resize operation for shm objects stored in C program heap.
int	_POSIX_Shm_Object_read_from_heap (POSIX_Shm_Object *shm_obj, void *buf, size_t count)
	object_read operation for shm objects stored in C program heap.
void *	_POSIX_Shm_Object_mmap_from_heap (POSIX_Shm_Object *shm_obj, size_t len, int prot, off_t off)
	object_mmap operation for shm objects stored in C program heap.

Variables
const POSIX_Shm_Object_operations	_POSIX_Shm_Object_operations
Objects_Information	_POSIX_Shm_Information
	The POSIX Shared Memory objects information.
RTEMS_INLINE_ROUTINE POSIX_Shm_Control *	_POSIX_Shm_Allocate_unprotected (void)
RTEMS_INLINE_ROUTINE void	_POSIX_Shm_Free (POSIX_Shm_Control *the_shm)
	POSIX Shared Memory Free. More...
RTEMS_INLINE_ROUTINE POSIX_Shm_Control *	_POSIX_Shm_Get_by_name (const char *name, size_t *name_length_p, Objects_Get_by_name_error *error)
RTEMS_INLINE_ROUTINE void	_POSIX_Shm_Update_atime (POSIX_Shm_Control *shm)
RTEMS_INLINE_ROUTINE void	_POSIX_Shm_Update_mtime_ctime (POSIX_Shm_Control *shm)

Detailed Description

Internal implementation support for POSIX shared memory.

Macro Definition Documentation

POSIX_SHM_INFORMATION_DEFINE

#define POSIX_SHM_INFORMATION_DEFINE

(

max

)

Value:

  OBJECTS_INFORMATION_DEFINE( \
    _POSIX_Shm, \
    OBJECTS_POSIX_API, \
    OBJECTS_POSIX_SHMS, \
    POSIX_Shm_Control, \
    max, \
    _POSIX_PATH_MAX, \
    NULL \
  )

Macro to define the objects information for the POSIX Shared Memory objects.

This macro should only be used by <rtems/confdefs.h>.

Parameters

max	The configured object maximum (the OBJECTS_UNLIMITED_OBJECTS flag may be set).

Function Documentation

_POSIX_Shm_Free()

RTEMS_INLINE_ROUTINE void _POSIX_Shm_Free

(

POSIX_Shm_Control *

the_shm

)

POSIX Shared Memory Free.

This routine frees a shm control block.