fifo.c File Reference

FIFO/Pipe Support. More...

#include <sys/param.h>
#include <sys/filio.h>
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <rtems.h>
#include <rtems/libio_.h>
#include <rtems/pipe.h>

Macros
#define	LIBIO_ACCMODE(_iop)
#define	LIBIO_NODELAY(_iop)
#define	PIPE_EMPTY(_pipe)
#define	PIPE_FULL(_pipe)
#define	PIPE_SPACE(_pipe)
#define	PIPE_WSTART(_pipe)
#define	PIPE_LOCK(_pipe)
#define	PIPE_UNLOCK(_pipe)
#define	PIPE_READWAIT(_pipe)
#define	PIPE_WRITEWAIT(_pipe)
#define	PIPE_WAKEUPREADERS(_pipe)
#define	PIPE_WAKEUPWRITERS(_pipe)

Functions
void	pipe_release (pipe_control_t **pipep, rtems_libio_t *iop)
	Release a pipe.
int	fifo_open (pipe_control_t **pipep, rtems_libio_t *iop)
	File system open. Interface to file system open.
ssize_t	pipe_read (pipe_control_t *pipe, void *buffer, size_t count, rtems_libio_t *iop)
	File system read.
ssize_t	pipe_write (pipe_control_t *pipe, const void *buffer, size_t count, rtems_libio_t *iop)
	File system write.
int	pipe_ioctl (pipe_control_t *pipe, ioctl_command_t cmd, void *buffer, rtems_libio_t *iop)
	File system Input/Output control.

Detailed Description

FIFO/Pipe Support.

Macro Definition Documentation

LIBIO_ACCMODE

#define LIBIO_ACCMODE

(

_iop

)

Value:

(rtems_libio_iop_flags(_iop) & LIBIO_FLAGS_READ_WRITE)

LIBIO_NODELAY

#define LIBIO_NODELAY

(

_iop

)

Value:

rtems_libio_iop_is_no_delay(_iop)

PIPE_EMPTY

#define PIPE_EMPTY

(

_pipe

)

Value:

(_pipe->Length == 0)

PIPE_FULL

#define PIPE_FULL

(

_pipe

)

Value:

(_pipe->Length == _pipe->Size)

PIPE_LOCK

#define PIPE_LOCK

(

_pipe

)

Value:

rtems_mutex_lock(&(_pipe)->Mutex)

PIPE_READWAIT

#define PIPE_READWAIT

(

_pipe

)

Value:

rtems_condition_variable_wait(&(_pipe)->readBarrier, &(_pipe)->Mutex)

PIPE_SPACE

#define PIPE_SPACE

(

_pipe

)

Value:

(_pipe->Size - _pipe->Length)

PIPE_UNLOCK

#define PIPE_UNLOCK

(

_pipe

)

Value:

rtems_mutex_unlock(&(_pipe)->Mutex)

PIPE_WAKEUPREADERS

#define PIPE_WAKEUPREADERS

(

_pipe

)

Value:

rtems_condition_variable_broadcast(&(_pipe)->readBarrier)

PIPE_WAKEUPWRITERS

#define PIPE_WAKEUPWRITERS

(

_pipe

)

Value:

rtems_condition_variable_broadcast(&(_pipe)->writeBarrier)

PIPE_WRITEWAIT

#define PIPE_WRITEWAIT

(

_pipe

)

Value:

rtems_condition_variable_wait(&(_pipe)->writeBarrier, &(_pipe)->Mutex)

PIPE_WSTART

#define PIPE_WSTART

(

_pipe

)

Value:

((_pipe->Start + _pipe->Length) % _pipe->Size)