48351eaf73
/usr/share/examples/etc/bsd-style-copyright. I've fixed a few minor wording and formatting differences. Approved by: matk, Hannu Savolainen <hannu@opensound.com> Reviewed by: imp
107 lines
5.5 KiB
C
107 lines
5.5 KiB
C
/*-
|
|
* Copyright (c) 2003 Mathew Kanner
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#ifndef MIDIQ_H
|
|
#define MIDIQ_H
|
|
|
|
#define MIDIQ_MOVE(a,b,c) bcopy(b,a,c)
|
|
|
|
#define MIDIQ_HEAD(name, type) \
|
|
struct name { \
|
|
int h, t, s; \
|
|
type * b; \
|
|
}
|
|
|
|
#define MIDIQ_INIT(head, buf, size) do { \
|
|
(head).h=(head).t=0; \
|
|
(head).s=size; \
|
|
(head).b=buf; \
|
|
} while (0)
|
|
|
|
#define MIDIQ_EMPTY(head) ((head).h == (head).t )
|
|
|
|
#define MIDIQ_LENBASE(head) ((head).h - (head).t < 0 ? \
|
|
(head).h - (head).t + (head).s : \
|
|
(head).h - (head).t)
|
|
|
|
#define MIDIQ_FULL(head) ((head).h == -1)
|
|
#define MIDIQ_AVAIL(head) (MIDIQ_FULL(head) ? 0 : (head).s - MIDIQ_LENBASE(head))
|
|
#define MIDIQ_LEN(head) ((head).s - MIDIQ_AVAIL(head))
|
|
#define MIDIQ_DEBUG 0
|
|
/*
|
|
* No protection against overflow, underflow
|
|
*/
|
|
#define MIDIQ_ENQ(head, buf, size) do { \
|
|
if(MIDIQ_DEBUG)\
|
|
printf("#1 %p %p bytes copied %jd tran req s %d h %d t %d\n", \
|
|
&(head).b[(head).h], (buf), \
|
|
(intmax_t)(sizeof(*(head).b) * \
|
|
MIN( (size), (head).s - (head).h) ), \
|
|
(size), (head).h, (head).t); \
|
|
MIDIQ_MOVE(&(head).b[(head).h], (buf), sizeof(*(head).b) * MIN((size), (head).s - (head).h)); \
|
|
if( (head).s - (head).h < (size) ) { \
|
|
if(MIDIQ_DEBUG) \
|
|
printf("#2 %p %p bytes copied %jd\n", (head).b, (buf) + (head).s - (head).h, (intmax_t)sizeof(*(head).b) * ((size) - (head).s + (head).h) ); \
|
|
MIDIQ_MOVE((head).b, (buf) + (head).s - (head).h, sizeof(*(head).b) * ((size) - (head).s + (head).h) ); \
|
|
} \
|
|
(head).h+=(size); \
|
|
(head).h%=(head).s; \
|
|
if(MIDIQ_EMPTY(head)) (head).h=-1; \
|
|
if(MIDIQ_DEBUG)\
|
|
printf("#E h %d t %d\n", (head).h, (head).t); \
|
|
} while (0)
|
|
|
|
#define MIDIQ_DEQ_I(head, buf, size, move, update) do { \
|
|
if(MIDIQ_FULL(head)) (head).h=(head).t; \
|
|
if(MIDIQ_DEBUG)\
|
|
printf("#1 %p %p bytes copied %jd tran req s %d h %d t %d\n", &(head).b[(head).t], (buf), (intmax_t)sizeof(*(head).b) * MIN((size), (head).s - (head).t), (size), (head).h, (head).t); \
|
|
if (move) MIDIQ_MOVE((buf), &(head).b[(head).t], sizeof(*(head).b) * MIN((size), (head).s - (head).t)); \
|
|
if( (head).s - (head).t < (size) ) { \
|
|
if(MIDIQ_DEBUG) \
|
|
printf("#2 %p %p bytes copied %jd\n", (head).b, (buf) + (head).s - (head).t, (intmax_t)sizeof(*(head).b) * ((size) - (head).s + (head).t) ); \
|
|
if (move) MIDIQ_MOVE((buf) + (head).s - (head).t, (head).b, sizeof(*(head).b) * ((size) - (head).s + (head).t) ); \
|
|
} \
|
|
if (update) { \
|
|
(head).t+=(size); \
|
|
(head).t%=(head).s; \
|
|
} else { \
|
|
if (MIDIQ_EMPTY(head)) (head).h=-1; \
|
|
} \
|
|
if(MIDIQ_DEBUG)\
|
|
printf("#E h %d t %d\n", (head).h, (head).t); \
|
|
} while (0)
|
|
|
|
#define MIDIQ_SIZE(head) ((head).s)
|
|
#define MIDIQ_CLEAR(head) ((head).h = (head).t = 0)
|
|
#define MIDIQ_BUF(head) ((head).b)
|
|
#define MIDIQ_DEQ(head, buf, size) MIDIQ_DEQ_I(head, buf, size, 1, 1)
|
|
#define MIDIQ_PEEK(head, buf, size) MIDIQ_DEQ_I(head, buf, size, 1, 0)
|
|
#define MIDIQ_POP(head, size) MIDIQ_DEQ_I(head, &head, size, 0, 1)
|
|
|
|
#endif
|