RTEMS  5.1
Data Structures | Macros
ringbuf.h File Reference

Simple Ring Buffer Functionality. More...

#include <rtems.h>

Go to the source code of this file.

Data Structures

struct  Ring_buffer_t
 

Macros

#define RINGBUF_QUEUE_LENGTH   128
 
#define Ring_buffer_Initialize(_buffer)
 
#define Ring_buffer_Destory(_buffer)
 
#define Ring_buffer_Is_empty(_buffer)   ( (_buffer)->head == (_buffer)->tail )
 
#define Ring_buffer_Is_full(_buffer)   ( (_buffer)->head == ((_buffer)->tail + 1) % RINGBUF_QUEUE_LENGTH )
 
#define Ring_buffer_Add_character(_buffer, _ch)
 
#define Ring_buffer_Remove_character(_buffer, _ch)
 

Detailed Description

Simple Ring Buffer Functionality.

This file provides simple ring buffer functionality.

Macro Definition Documentation

◆ Ring_buffer_Add_character

#define Ring_buffer_Add_character (   _buffer,
  _ch 
)
Value:
do { \
rtems_interrupt_lock_context lock_context; \
rtems_interrupt_lock_acquire( &(_buffer)->lock, &lock_context ); \
(_buffer)->tail = ((_buffer)->tail+1) % RINGBUF_QUEUE_LENGTH; \
(_buffer)->buffer[ (_buffer)->tail ] = (_ch); \
rtems_interrupt_lock_release( &(_buffer)->lock, &lock_context ); \
} while ( 0 )
#define rtems_interrupt_lock_acquire(_lock, _lock_context)
Acquires an interrupt lock.
Definition: intr.h:305

◆ Ring_buffer_Destory

#define Ring_buffer_Destory (   _buffer)
Value:
do { \
rtems_interrupt_lock_destroy(&(_buffer)->lock); \
} while ( 0 )

◆ Ring_buffer_Initialize

#define Ring_buffer_Initialize (   _buffer)
Value:
do { \
(_buffer)->head = (_buffer)->tail = 0; \
rtems_interrupt_lock_initialize(&(_buffer)->lock, "ring buffer"); \
} while ( 0 )

◆ Ring_buffer_Remove_character

#define Ring_buffer_Remove_character (   _buffer,
  _ch 
)
Value:
do { \
rtems_interrupt_lock_context lock_context; \
rtems_interrupt_lock_acquire( &(_buffer)->lock, &lock_context ); \
(_buffer)->head = ((_buffer)->head+1) % RINGBUF_QUEUE_LENGTH; \
(_ch) = (_buffer)->buffer[ (_buffer)->head ]; \
rtems_interrupt_lock_release( &(_buffer)->lock, &lock_context ); \
} while ( 0 )
#define rtems_interrupt_lock_acquire(_lock, _lock_context)
Acquires an interrupt lock.
Definition: intr.h:305