Workspace Handler

This handler encapsulates functionality related to the management of the RTEMS Executive Workspace. More...

Collaboration diagram for Workspace Handler:

Files
file	wkspace.c
	Workspace Handler Support.
file	wkstringduplicate.c
	Duplicates String with Memory from the Workspace.

Functions
void	_Workspace_Handler_initialization (Heap_Area *areas, size_t area_count, Heap_Initialization_or_extend_handler extend)
	Initilize workspace handler. More...
void *	_Workspace_Allocate (size_t size)
	Allocate memory from workspace. More...
void *	_Workspace_Allocate_aligned (size_t size, size_t alignment)
	Allocate aligned memory from workspace. More...
void	_Workspace_Free (void *block)
	Free memory to the workspace. More...
void *	_Workspace_Allocate_or_fatal_error (size_t size)
	Workspace allocate or fail with fatal error. More...
char *	_Workspace_String_duplicate (const char *string, size_t len)
	Duplicates string with memory from the workspace. More...

Variables
SCORE_EXTERN Heap_Control	_Workspace_Area
	Executive workspace control. More...

Detailed Description

This handler encapsulates functionality related to the management of the RTEMS Executive Workspace.

Function Documentation

_Workspace_Allocate()

void* _Workspace_Allocate

(

size_t

size

)

Allocate memory from workspace.

This routine returns the address of a block of memory of size bytes. If a block of the appropriate size cannot be allocated from the workspace, then NULL is returned.

Parameters

size	is the requested size

Return values

a	pointer to the requested memory or NULL.

_Workspace_Allocate_aligned()

void* _Workspace_Allocate_aligned	(	size_t	size,
		size_t	alignment
	)

Allocate aligned memory from workspace.

Parameters

[in]	size	The size of the requested memory.
[in]	alignment	The alignment of the requested memory.

Return values

NULL	Not enough resources.
other	The memory area begin.

_Workspace_Allocate_or_fatal_error()

void* _Workspace_Allocate_or_fatal_error

(

size_t

size

)

Workspace allocate or fail with fatal error.

This routine returns the address of a block of memory of size bytes. If a block of the appropriate size cannot be allocated from the workspace, then the internal error handler is invoked.

Parameters

[in]

size

is the desired number of bytes to allocate

Return values

If	successful, the starting address of the allocated memory

Referenced by _Objects_MP_Handler_initialization(), and _Thread_MP_Handler_initialization().

_Workspace_Free()

void _Workspace_Free

(

void *

block

)

Free memory to the workspace.

This function frees the specified block of memory. If the block belongs to the Workspace and can be successfully freed, then true is returned. Otherwise false is returned.

Parameters

block

is the memory to free

Note

If block is equal to NULL, then the request is ignored. This allows the caller to not worry about whether or not a pointer is NULL.

Referenced by _Objects_Namespace_remove(), _POSIX_Message_queue_Delete(), _POSIX_Threads_cancel_run(), and _RTEMS_Tasks_Invoke_task_variable_dtor().

_Workspace_Handler_initialization()

void _Workspace_Handler_initialization	(	Heap_Area *	areas,
		size_t	area_count,
		Heap_Initialization_or_extend_handler	extend
	)

Initilize workspace handler.

This routine performs the initialization necessary for this handler.

References _Heap_Initialize().

_Workspace_String_duplicate()

char* _Workspace_String_duplicate	(	const char *	string,
		size_t	len
	)

Duplicates string with memory from the workspace.

Parameters

[in]	string	is the pointer to a zero terminated string.
[in]	len	is the length of the string (equal to strlen(string)).

Return values

NULL	Not enough memory.
other	Duplicated string.

Variable Documentation

_Workspace_Area

SCORE_EXTERN Heap_Control _Workspace_Area

Executive workspace control.

This is the heap control structure used to manage the RTEMS Executive Workspace.

Referenced by rtems_workspace_allocate(), rtems_workspace_free(), and rtems_workspace_get_information().