ISR Pipe

ISR -> userspace pipe. More...

Detailed Description

ISR -> userspace pipe.

Modules
	Read timeouts with ISR pipe
	ISR -> userspace pipe with timeout.

Files
file	isrpipe.h
	isrpipe Interface

Data Structures
struct	isrpipe_t
	Context structure for isrpipe. More...

Macros
#define	ISRPIPE_INIT(tsrb_buf)   { .mutex = MUTEX_INIT, .tsrb = TSRB_INIT(tsrb_buf) }
	Static initializer for irspipe.

Functions
void	isrpipe_init (isrpipe_t *isrpipe, char *buf, size_t bufsize)
	Initialisation function for isrpipe. More...
int	isrpipe_write_one (isrpipe_t *isrpipe, char c)
	Put one character into the isrpipe's buffer. More...
int	isrpipe_read (isrpipe_t *isrpipe, char *buf, size_t count)
	Read data from isrpipe (blocking) More...

Function Documentation

isrpipe_init()

void isrpipe_init	(	isrpipe_t *	isrpipe,
		char *	buf,
		size_t	bufsize
	)

Initialisation function for isrpipe.

Parameters

[in]	isrpipe	isrpipe object to initialize
[in]	buf	buffer to use as ringbuffer (must be power of two sized!)
[in]	bufsize	size of buf

isrpipe_read()

int isrpipe_read	(	isrpipe_t *	isrpipe,
		char *	buf,
		size_t	count
	)

Read data from isrpipe (blocking)

Parameters

[in]	isrpipe	isrpipe object to operate on
[in]	buf	buffer to write to
[in]	count	number of bytes to read

Returns

number of bytes read

isrpipe_write_one()

int isrpipe_write_one	(	isrpipe_t *	isrpipe,
		char	c
	)

Put one character into the isrpipe's buffer.

Parameters

[in]	isrpipe	isrpipe object to initialize
[in]	c	character to add to isrpipe buffer

Returns

0 if character could be added

-1 if buffer was full