circular_buffer.c File Reference

#include "circular_buffer.h"
#include <string.h>

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Functions
void	circular_buffer_init (struct circular_buffer *cb, uint8_t *buffer, size_t len)
	initialize a circular buffer.
int	circular_buffer_get (struct circular_buffer *cb, uint8_t *buf, size_t len)
	copy the next buffer available in cb to buf.
int	circular_buffer_put (struct circular_buffer *cb, const uint8_t *buf, size_t len)
	Copy buf in the circular buffer.
int	circular_buffer_drop (struct circular_buffer *cb)
	Drop last inserted record.
size_t	circular_buffer_available (struct circular_buffer *cb)
	Get the available sapce for the next buffer.
void	circular_buffer_clear (struct circular_buffer *cb)
	Clear buffer.

Function Documentation

circular_buffer_available()

size_t circular_buffer_available

(

struct circular_buffer *

cb

)

Get the available sapce for the next buffer.

Definition at line 110 of file circular_buffer.c.

References circular_buffer::_buf_len, foo, circular_buffer::read_offset, and circular_buffer::write_offset.

Referenced by circular_buffer_put().

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circular_buffer_clear()

void circular_buffer_clear

(

struct circular_buffer *

cb

)

Clear buffer.

Definition at line 122 of file circular_buffer.c.

References circular_buffer::read_offset, and circular_buffer::write_offset.

circular_buffer_drop()

int circular_buffer_drop

(

struct circular_buffer *

cb

)

Drop last inserted record.

Definition at line 90 of file circular_buffer.c.

References circular_buffer::_buf, circular_buffer::_buf_len, CIR_ERROR_NO_MSG, foo, circular_buffer::read_offset, and circular_buffer::write_offset.

Referenced by uavcan_broadcast().

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circular_buffer_get()

int circular_buffer_get	(	struct circular_buffer *	cb,
		uint8_t *	buf,
		size_t	len
	)

copy the next buffer available in cb to buf.

Parameters

cb	The circular buffer
buf	destination buffer
len	size of buf

Returns

Size of the data copied to buf, or an error code if negative.

Definition at line 22 of file circular_buffer.c.

References circular_buffer::_buf, circular_buffer::_buf_len, CIR_ERROR_BUFFER_TOO_SMALL, CIR_ERROR_NO_MSG, foo, circular_buffer::read_offset, and circular_buffer::write_offset.

Referenced by sts3032_event(), and uavcan_tx().

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circular_buffer_init()

void circular_buffer_init	(	struct circular_buffer *	cb,
		uint8_t *	buffer,
		size_t	len
	)

initialize a circular buffer.

Parameters

cb	circular_buffer structure
buffer	buffer used internally by the circular buffer
len	size of buffer

Definition at line 13 of file circular_buffer.c.

References circular_buffer::_buf, circular_buffer::_buf_len, circular_buffer::read_offset, and circular_buffer::write_offset.

Referenced by actuators_sts3032_init(), and uavcanInitIface().

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circular_buffer_put()

int circular_buffer_put	(	struct circular_buffer *	cb,
		const uint8_t *	buf,
		size_t	len
	)

Copy buf in the circular buffer.

Parameters

cb	The circular buffer
buf	source buffer
len	Size of buf

Returns

0 on success, Error code if negative

Definition at line 52 of file circular_buffer.c.

References circular_buffer::_buf, circular_buffer::_buf_len, CIR_ERROR_NO_SPACE_AVAILABLE, circular_buffer_available(), foo, and circular_buffer::write_offset.

Referenced by uavcan_broadcast(), and write_buf().

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