rtl-bit-alloc.h File Reference

RTEMS Run-Time Linker Bit Allocator Header. More...

#include <rtems/rtl/rtl-fwd.h>
#include <rtems/rtl/rtl-obj-fwd.h>

Go to the source code of this file.

Data Structures
struct	rtems_rtl_bit_alloc

Typedefs
typedef struct rtems_rtl_bit_alloc	rtems_rtl_bit_alloc

Functions
rtems_rtl_bit_alloc *	rtems_rtl_bit_alloc_open (void *base, size_t size, size_t block_size, size_t used)
void	rtems_rtl_bit_alloc_close (rtems_rtl_bit_alloc *balloc)
void *	rtems_rtl_bit_alloc_balloc (rtems_rtl_bit_alloc *balloc, size_t size)
void	rtems_rtl_bit_alloc_bfree (rtems_rtl_bit_alloc *balloc, void *addr, size_t size)

Detailed Description

RTEMS Run-Time Linker Bit Allocator Header.

Typedef Documentation

rtems_rtl_bit_alloc

typedef struct rtems_rtl_bit_alloc rtems_rtl_bit_alloc

Bit Allocator data

Function Documentation

rtems_rtl_bit_alloc_balloc()

void * rtems_rtl_bit_alloc_balloc	(	rtems_rtl_bit_alloc *	balloc,
		size_t	size
	)

Allocate a piece of memory being managed. The size is in bytes are is rounded up the next block size.

Parameters

balloc	The allocator.
size	Number of bytes to allocate.

Returns

void* The memory if the allocation is successful else NULL if there is no more memory.

rtems_rtl_bit_alloc_bfree()

void rtems_rtl_bit_alloc_bfree	(	rtems_rtl_bit_alloc *	balloc,
		void *	addr,
		size_t	size
	)

Free an allocated memory block. The size is required because the allocator does not contain any state information.

rtems_rtl_bit_alloc_close()

void rtems_rtl_bit_alloc_close

(

rtems_rtl_bit_alloc *

balloc

)

Close the bit allocator.

Parameters

balloc

The allocator to close.

rtems_rtl_bit_alloc_open()

rtems_rtl_bit_alloc * rtems_rtl_bit_alloc_open	(	void *	base,
		size_t	size,
		size_t	block_size,
		size_t	used
	)

Open a bit allocator. The allocator allocates block_size pieces of the memory being managed.

Parameters

base	The memory to managem NULL to allocate a piece of memory.
size	The size of the memory being managed in bytes.
block_size	The minimum allocation unit in bytes.
used	The amount of memory already in use in bytes.

Return values

rtems_rtl_bit_alloc

The bit allocator structure.