erasurecode_helpers.c File Reference

#include <assert.h>
#include <stdio.h>
#include <stdarg.h>
#include <zlib.h>
#include "erasurecode_backend.h"
#include "erasurecode_helpers.h"
#include "erasurecode_helpers_ext.h"
#include "erasurecode_stdinc.h"
#include "erasurecode_version.h"
#include "alg_sig.h"
#include "erasurecode_log.h"

Go to the source code of this file.

Functions
static bool	is_fragment (char *buf)
	__attribute__ ((visibility("internal")))
	Memory Management Methods.
void *	alloc_and_set_buffer (int size, int value)
	Allocate a buffer of a specific size and set its' contents to the specified value.
char *	get_data_ptr_from_fragment (char *buf)
int	get_libec_version (char *buf, uint32_t *ver)
int	get_backend_id (char *buf, ec_backend_id_t *id)
int	get_backend_version (char *buf, uint32_t *version)

Function Documentation

__attribute__()

__attribute__

(

(visibility("internal"))

)

Memory Management Methods.

Compute a size aligned to the number of data and the underlying wordsize of the EC algorithm.

Return total fragment length (on-disk, on-wire)

Deallocate memory buffer if it's not NULL.

Allocate a zero-ed buffer of a specific size.

The following methods provide wrappers for allocating and deallocating memory.

Parameters

size	integer size in bytes of buffer to allocate

Returns

pointer to start of allocated buffer or NULL on error

This methods returns NULL so that you can free and reset a buffer using a single line as follows:

my_ptr = check_and_free_buffer(my_ptr);

Returns

NULL

Parameters

buf	- pointer to fragment buffer

Returns

fragment size on disk

Parameters

instance	- ec_backend_t instance (to extract args)
data_len	- integer length of data in bytes

Returns

integer data length aligned with wordsize of EC algorithm

Ensure all memory is aligned to 16-byte boundaries to support 128-bit operations

Definition at line 61 of file erasurecode_helpers.c.

alloc_and_set_buffer()

void * alloc_and_set_buffer	(	int	size,
		int	value
	)

Allocate a buffer of a specific size and set its' contents to the specified value.

Parameters

size	integer size in bytes of buffer to allocate
value

Returns

pointer to start of allocated buffer or NULL on error

Definition at line 99 of file erasurecode_helpers.c.

Referenced by liberasurecode_decode(), and liberasurecode_reconstruct_fragment().

get_backend_id()

int get_backend_id	(	char *	buf,
		ec_backend_id_t *	id
	)

Definition at line 452 of file erasurecode_helpers.c.

References is_fragment().

get_backend_version()

int get_backend_version	(	char *	buf,
		uint32_t *	version
	)

Definition at line 473 of file erasurecode_helpers.c.

References is_fragment().

get_data_ptr_from_fragment()

char * get_data_ptr_from_fragment

(

char *

buf

)

Definition at line 218 of file erasurecode_helpers.c.

Referenced by __attribute__(), and liberasurecode_get_fragment_metadata().

get_libec_version()

int get_libec_version	(	char *	buf,
		uint32_t *	ver
	)

Definition at line 431 of file erasurecode_helpers.c.

References is_fragment().

Referenced by is_invalid_fragment().

is_fragment()

static bool is_fragment ( char *  buf )

static

Definition at line 43 of file erasurecode_helpers.c.

Referenced by get_backend_id(), get_backend_version(), and get_libec_version().