1 /* $OpenBSD: rcvbuf.h,v 1.2 2023/01/10 17:10:57 miod Exp $ */ 2 /* $NetBSD: rcvbuf.h,v 1.1 2013/01/05 17:44:24 tsutsui Exp $ */ 3 4 /* 5 * Copyright (c) 1992 OMRON Corporation. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * OMRON Corporation. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * @(#)rcvbuf.h 8.1 (Berkeley) 6/10/93 39 */ 40 /* 41 * Copyright (c) 1992, 1993 42 * The Regents of the University of California. All rights reserved. 43 * 44 * This code is derived from software contributed to Berkeley by 45 * OMRON Corporation. 46 * 47 * Redistribution and use in source and binary forms, with or without 48 * modification, are permitted provided that the following conditions 49 * are met: 50 * 1. Redistributions of source code must retain the above copyright 51 * notice, this list of conditions and the following disclaimer. 52 * 2. Redistributions in binary form must reproduce the above copyright 53 * notice, this list of conditions and the following disclaimer in the 54 * documentation and/or other materials provided with the distribution. 55 * 3. Neither the name of the University nor the names of its contributors 56 * may be used to endorse or promote products derived from this software 57 * without specific prior written permission. 58 * 59 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 60 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 61 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 62 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 63 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 64 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 65 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 66 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 67 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 68 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 69 * SUCH DAMAGE. 70 * 71 * @(#)rcvbuf.h 8.1 (Berkeley) 6/10/93 72 */ 73 74 /* 75 * rcvbuf.h -- receive buffer control structure definition 76 * by A.Fujita, Dec-12-1992 77 */ 78 79 #define RBUF_SIZE 128 80 81 struct rcvbuf { 82 u_char * volatile rb_push; 83 u_char * volatile rb_pop; 84 u_char rb_buf[RBUF_SIZE+4]; 85 }; 86 87 #define RBUF_INIT(n) rcvbuf[n].rb_pop = rcvbuf[n].rb_push = &rcvbuf[n].rb_buf[RBUF_SIZE] 88 89 #define PUSH_RBUF(n, c) \ 90 do { \ 91 *(--rcvbuf[n].rb_push) = c ; \ 92 if (rcvbuf[n].rb_push == rcvbuf[n].rb_buf) \ 93 rcvbuf[n].rb_push = &rcvbuf[n].rb_buf[RBUF_SIZE]; \ 94 } while (/* CONSTCOND */0) 95 96 #define POP_RBUF(n, c) \ 97 do { \ 98 c= *(--rcvbuf[n].rb_pop); \ 99 if (rcvbuf[n].rb_pop == rcvbuf[n].rb_buf) \ 100 rcvbuf[n].rb_pop = &rcvbuf[n].rb_buf[RBUF_SIZE]; \ 101 } while (0) 102 103 #define PEEK_RBUF(n, c) \ 104 do { \ 105 c= *(rcvbuf[n].rb_pop - 1); \ 106 } while (0) 107 108 #define RBUF_EMPTY(n) (rcvbuf[n].rb_push == rcvbuf[n].rb_pop ? 1: 0) 109 110 extern struct rcvbuf rcvbuf[]; 111