diff options
Diffstat (limited to 'cpukit/libcsupport/include/ringbuf.h')
-rw-r--r-- | cpukit/libcsupport/include/ringbuf.h | 53 |
1 files changed, 0 insertions, 53 deletions
diff --git a/cpukit/libcsupport/include/ringbuf.h b/cpukit/libcsupport/include/ringbuf.h deleted file mode 100644 index 8c80aaf9c8..0000000000 --- a/cpukit/libcsupport/include/ringbuf.h +++ /dev/null @@ -1,53 +0,0 @@ -/* - * ringbuf.h - * - * This file provides simple ring buffer functionality. - * - * $Id$ - */ - -#ifndef __RINGBUF_H__ -#define __RINGBUF_H__ - -#ifndef RINGBUF_QUEUE_LENGTH -#define RINGBUF_QUEUE_LENGTH 128 -#endif - -typedef struct { - char buffer[RINGBUF_QUEUE_LENGTH]; - volatile int head; - volatile int tail; -} Ring_buffer_t; - -#define Ring_buffer_Initialize( _buffer ) \ - do { \ - (_buffer)->head = (_buffer)->tail = 0; \ - } while ( 0 ) - -#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 ) \ - do { \ - rtems_unsigned32 isrlevel; \ - \ - rtems_interrupt_disable( isrlevel ); \ - (_buffer)->tail = ((_buffer)->tail+1) % RINGBUF_QUEUE_LENGTH; \ - (_buffer)->buffer[ (_buffer)->tail ] = (_ch); \ - rtems_interrupt_enable( isrlevel ); \ - } while ( 0 ) - -#define Ring_buffer_Remove_character( _buffer, _ch ) \ - do { \ - rtems_unsigned32 isrlevel; \ - \ - rtems_interrupt_disable( isrlevel ); \ - (_buffer)->head = ((_buffer)->head+1) % RINGBUF_QUEUE_LENGTH; \ - (_ch) = (_buffer)->buffer[ (_buffer)->head ]; \ - rtems_interrupt_enable( isrlevel ); \ - } while ( 0 ) - -#endif |