bulk_transfer.c File Reference

Unidirectional bulk data transfer via shared memory. More...

Functions
void	bulk_destroy (struct bulk_transfer *bt)
	Destroy bulk data transport on shared memory region. More...
errval_t	bulk_init (void *mem, size_t size, size_t block_size, struct bulk_transfer *bt)
	Initialize bulk data transport on shared memory region. More...
errval_t	bulk_create (size_t size, size_t block_size, struct capref *shared_mem, struct bulk_transfer *bt)
	Create bulk data transport on allocated shared memory region. More...
struct bulk_buf *	bulk_alloc (struct bulk_transfer *bt)
	Allocate a buffer from a bulk transfer region. More...
void	bulk_buf_copy (struct bulk_buf *bb, void *buf, size_t buf_size)
	copy data from a buffer to a bulk buffer More...
errval_t	bulk_free (struct bulk_transfer *bt, uintptr_t id)
	Frees a buffer to its bulk transfer region. More...

Detailed Description

Unidirectional bulk data transfer via shared memory.

Function Documentation

struct bulk_buf* bulk_alloc

(

struct bulk_transfer *

bt

)

Allocate a buffer from a bulk transfer region.

Parameters

bt	Pointer to state

Returns

Pointer to allocated bulk buffer or NULL on out of memory

void bulk_buf_copy	(	struct bulk_buf *	bb,
		void *	buf,
		size_t	buf_size
	)

copy data from a buffer to a bulk buffer

Parameters

bb	bulk buffer to copy the data
buf	(source) buffer
buf_size	size of (source) buffer:

errval_t bulk_create	(	size_t	size,
		size_t	block_size,
		struct capref *	shared_mem,
		struct bulk_transfer *	bt
	)

Create bulk data transport on allocated shared memory region.

Parameters

size	Size in bytes of shared memory region to allocate
block_size	Size in bytes of a buffer block
shared_mem	Return parameter to allocated shared memory capability
bt	Pointer to bulk transfer state to be filled

Returns

Error value.

void bulk_destroy

(

struct bulk_transfer *

bt

)

Destroy bulk data transport on shared memory region.

Parameters

bt	Pointer to bulk transfer state to be destroyed

errval_t bulk_free	(	struct bulk_transfer *	bt,
		uintptr_t	id
	)

Frees a buffer to its bulk transfer region.

Parameters

buf	Pointer to buffer state
id	ID of buffer to be freed

errval_t bulk_init	(	void *	mem,
		size_t	size,
		size_t	block_size,
		struct bulk_transfer *	bt
	)

Initialize bulk data transport on shared memory region.

Parameters

mem	Pointer to shared memory region
size	Size in bytes of region
block_size	Size in bytes of a buffer block
bt	Pointer to bulk transfer state to be filled

Returns

Error value.