System data

System data buffers. More...

Macros
#define	AUX_BUF_SIZE   (5*512)
	System aux memory buffer size.

Functions
char *	aux_buf_ptr ()
	Get pointer to aux memory buffer. More...
void *	write_buf_ptr ()
	Get pointer to write buffer. More...
int	write_buf_size ()
	Get write buffer size. More...
void	sys_clear_write_buf_used ()
	Clear 'write-buffer-used' flag.
int	sys_write_buf_used ()
	Get 'write-buffer-used' flag. More...

Detailed Description

System data buffers.

System gives access to two memory blocks (Auxiliary buffer and write buffer) for temporary use by program. Mainly to avoid repeated use of memory allocation and avoid possibility of not available memory.

Auxiliary buffer is always available.

Write buffer is shared with system for disk write operations. Therefore data in this buffer can be overwritten by disk write operations. User can use sys_clear_write_buf_used() and sys_write_buf_used() functions to clear and check write buffer used flag. User should also avoid to use this buffer if disk write mode is enabled (see sys_disk_write_enable() ).

Function Documentation

aux_buf_ptr()

char* aux_buf_ptr

(

)

Get pointer to aux memory buffer.

Returns

Pointer to aux memory buffer

sys_write_buf_used()

int sys_write_buf_used

(

)

Get 'write-buffer-used' flag.

Returns

'write-buffer-used' flag

This flag is se by any disk write operation which uses write buffer.

write_buf_ptr()

void* write_buf_ptr

(

)

Get pointer to write buffer.

Returns

Pointer to write buffer

write_buf_size()

int write_buf_size

(

)

Get write buffer size.

Returns

Write buffer size