dropbear: circbuffer.c annotate

annotate circbuffer.c @ 1073:88043f9d40bd

Fix when iov queue is large

author	Matt Johnston <matt@ucc.asn.au>
date	Fri, 20 Mar 2015 23:33:45 +0800
parents	c71df09bc610
children	acf444bcb115

rev	line source
108 10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1 /*
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	2 * Dropbear SSH
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	3 *
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	4 * Copyright (c) 2002-2004 Matt Johnston
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	5 * All rights reserved.
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	6 *
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	7 * Permission is hereby granted, free of charge, to any person obtaining a copy
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	8 * of this software and associated documentation files (the "Software"), to deal
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	9 * in the Software without restriction, including without limitation the rights
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	10 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	11 * copies of the Software, and to permit persons to whom the Software is
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	12 * furnished to do so, subject to the following conditions:
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	13 *
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	14 * The above copyright notice and this permission notice shall be included in
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	15 * all copies or substantial portions of the Software.
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	16 *
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	20 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	23 * SOFTWARE. */
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	24
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	25 #include "includes.h"
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	26 #include "dbutil.h"
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	27 #include "circbuffer.h"
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	28
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	29 #define MAX_CBUF_SIZE 100000000
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	30
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	31 circbuffer * cbuf_new(unsigned int size) {
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	32
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	33 circbuffer *cbuf = NULL;
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	34
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	35 if (size > MAX_CBUF_SIZE) {
594 a98a2138364a Improve capitalisation for all logged strings Matt Johnston <matt@ucc.asn.au> parents: 241 diff changeset	36 dropbear_exit("Bad cbuf size");
108 10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	37 }
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	38
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	39 cbuf = (circbuffer*)m_malloc(sizeof(circbuffer));
709 abd99ecd7ec2 use an empty writebuf rather than a NULL one Matt Johnston <matt@ucc.asn.au> parents: 648 diff changeset	40 if (size > 0) {
abd99ecd7ec2 use an empty writebuf rather than a NULL one Matt Johnston <matt@ucc.asn.au> parents: 648 diff changeset	41 cbuf->data = (unsigned char*)m_malloc(size);
abd99ecd7ec2 use an empty writebuf rather than a NULL one Matt Johnston <matt@ucc.asn.au> parents: 648 diff changeset	42 }
108 10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	43 cbuf->used = 0;
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	44 cbuf->readpos = 0;
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	45 cbuf->writepos = 0;
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	46 cbuf->size = size;
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	47
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	48 return cbuf;
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	49 }
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	50
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	51 void cbuf_free(circbuffer * cbuf) {
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	52
648 4222a1039b06 Clear a few buffers when possible Matt Johnston <matt@ucc.asn.au> parents: 594 diff changeset	53 m_burn(cbuf->data, cbuf->size);
108 10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	54 m_free(cbuf->data);
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	55 m_free(cbuf);
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	56 }
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	57
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	58 unsigned int cbuf_getused(circbuffer * cbuf) {
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	59
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	60 return cbuf->used;
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	61
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	62 }
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	63
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	64 unsigned int cbuf_getavail(circbuffer * cbuf) {
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	65
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	66 return cbuf->size - cbuf->used;
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	67
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	68 }
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	69
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	70 unsigned int cbuf_readlen(circbuffer *cbuf) {
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	71
241 c5d3ef11155f * use own assertions which should get logged properly Matt Johnston <matt@ucc.asn.au> parents: 165 diff changeset	72 dropbear_assert(((2*cbuf->size)+cbuf->writepos-cbuf->readpos)%cbuf->size == cbuf->used%cbuf->size);
c5d3ef11155f * use own assertions which should get logged properly Matt Johnston <matt@ucc.asn.au> parents: 165 diff changeset	73 dropbear_assert(((2*cbuf->size)+cbuf->readpos-cbuf->writepos)%cbuf->size == (cbuf->size-cbuf->used)%cbuf->size);
108 10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	74
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	75 if (cbuf->used == 0) {
165 0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place Matt Johnston <matt@ucc.asn.au> parents: 108 diff changeset	76 TRACE(("cbuf_readlen: unused buffer"))
108 10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	77 return 0;
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	78 }
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	79
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	80 if (cbuf->readpos < cbuf->writepos) {
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	81 return cbuf->writepos - cbuf->readpos;
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	82 }
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	83
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	84 return cbuf->size - cbuf->readpos;
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	85 }
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	86
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	87 unsigned int cbuf_writelen(circbuffer *cbuf) {
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	88
241 c5d3ef11155f * use own assertions which should get logged properly Matt Johnston <matt@ucc.asn.au> parents: 165 diff changeset	89 dropbear_assert(cbuf->used <= cbuf->size);
c5d3ef11155f * use own assertions which should get logged properly Matt Johnston <matt@ucc.asn.au> parents: 165 diff changeset	90 dropbear_assert(((2*cbuf->size)+cbuf->writepos-cbuf->readpos)%cbuf->size == cbuf->used%cbuf->size);
c5d3ef11155f * use own assertions which should get logged properly Matt Johnston <matt@ucc.asn.au> parents: 165 diff changeset	91 dropbear_assert(((2*cbuf->size)+cbuf->readpos-cbuf->writepos)%cbuf->size == (cbuf->size-cbuf->used)%cbuf->size);
108 10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	92
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	93 if (cbuf->used == cbuf->size) {
165 0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place Matt Johnston <matt@ucc.asn.au> parents: 108 diff changeset	94 TRACE(("cbuf_writelen: full buffer"))
108 10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	95 return 0; /* full */
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	96 }
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	97
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	98 if (cbuf->writepos < cbuf->readpos) {
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	99 return cbuf->readpos - cbuf->writepos;
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	100 }
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	101
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	102 return cbuf->size - cbuf->writepos;
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	103 }
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	104
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	105 unsigned char* cbuf_readptr(circbuffer *cbuf, unsigned int len) {
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	106 if (len > cbuf_readlen(cbuf)) {
594 a98a2138364a Improve capitalisation for all logged strings Matt Johnston <matt@ucc.asn.au> parents: 241 diff changeset	107 dropbear_exit("Bad cbuf read");
108 10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	108 }
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	109
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	110 return &cbuf->data[cbuf->readpos];
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	111 }
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	112
1054 c71df09bc610 Avoid copying data into circular buffer Matt Johnston <matt@ucc.asn.au> parents: 709 diff changeset	113 void cbuf_readptrs(circbuffer *cbuf,
c71df09bc610 Avoid copying data into circular buffer Matt Johnston <matt@ucc.asn.au> parents: 709 diff changeset	114 unsigned char *p1, unsigned int len1,
c71df09bc610 Avoid copying data into circular buffer Matt Johnston <matt@ucc.asn.au> parents: 709 diff changeset	115 unsigned char *p2, unsigned int len2) {
c71df09bc610 Avoid copying data into circular buffer Matt Johnston <matt@ucc.asn.au> parents: 709 diff changeset	116 *p1 = &cbuf->data[cbuf->readpos];
c71df09bc610 Avoid copying data into circular buffer Matt Johnston <matt@ucc.asn.au> parents: 709 diff changeset	117 *len1 = MIN(cbuf->used, cbuf->size - cbuf->readpos);
c71df09bc610 Avoid copying data into circular buffer Matt Johnston <matt@ucc.asn.au> parents: 709 diff changeset	118
c71df09bc610 Avoid copying data into circular buffer Matt Johnston <matt@ucc.asn.au> parents: 709 diff changeset	119 if (*len1 < cbuf->used) {
c71df09bc610 Avoid copying data into circular buffer Matt Johnston <matt@ucc.asn.au> parents: 709 diff changeset	120 *p2 = cbuf->data;
c71df09bc610 Avoid copying data into circular buffer Matt Johnston <matt@ucc.asn.au> parents: 709 diff changeset	121 len2 = cbuf->used - len1;
c71df09bc610 Avoid copying data into circular buffer Matt Johnston <matt@ucc.asn.au> parents: 709 diff changeset	122 } else {
c71df09bc610 Avoid copying data into circular buffer Matt Johnston <matt@ucc.asn.au> parents: 709 diff changeset	123 *p2 = NULL;
c71df09bc610 Avoid copying data into circular buffer Matt Johnston <matt@ucc.asn.au> parents: 709 diff changeset	124 *len2 = 0;
c71df09bc610 Avoid copying data into circular buffer Matt Johnston <matt@ucc.asn.au> parents: 709 diff changeset	125 }
c71df09bc610 Avoid copying data into circular buffer Matt Johnston <matt@ucc.asn.au> parents: 709 diff changeset	126 }
c71df09bc610 Avoid copying data into circular buffer Matt Johnston <matt@ucc.asn.au> parents: 709 diff changeset	127
108 10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	128 unsigned char* cbuf_writeptr(circbuffer *cbuf, unsigned int len) {
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	129
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	130 if (len > cbuf_writelen(cbuf)) {
594 a98a2138364a Improve capitalisation for all logged strings Matt Johnston <matt@ucc.asn.au> parents: 241 diff changeset	131 dropbear_exit("Bad cbuf write");
108 10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	132 }
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	133
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	134 return &cbuf->data[cbuf->writepos];
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	135 }
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	136
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	137 void cbuf_incrwrite(circbuffer *cbuf, unsigned int len) {
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	138 if (len > cbuf_writelen(cbuf)) {
594 a98a2138364a Improve capitalisation for all logged strings Matt Johnston <matt@ucc.asn.au> parents: 241 diff changeset	139 dropbear_exit("Bad cbuf write");
108 10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	140 }
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	141
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	142 cbuf->used += len;
241 c5d3ef11155f * use own assertions which should get logged properly Matt Johnston <matt@ucc.asn.au> parents: 165 diff changeset	143 dropbear_assert(cbuf->used <= cbuf->size);
108 10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	144 cbuf->writepos = (cbuf->writepos + len) % cbuf->size;
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	145 }
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	146
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	147
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	148 void cbuf_incrread(circbuffer *cbuf, unsigned int len) {
1054 c71df09bc610 Avoid copying data into circular buffer Matt Johnston <matt@ucc.asn.au> parents: 709 diff changeset	149 #if 0
108 10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	150 if (len > cbuf_readlen(cbuf)) {
594 a98a2138364a Improve capitalisation for all logged strings Matt Johnston <matt@ucc.asn.au> parents: 241 diff changeset	151 dropbear_exit("Bad cbuf read");
108 10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	152 }
1054 c71df09bc610 Avoid copying data into circular buffer Matt Johnston <matt@ucc.asn.au> parents: 709 diff changeset	153 #endif
108 10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	154
241 c5d3ef11155f * use own assertions which should get logged properly Matt Johnston <matt@ucc.asn.au> parents: 165 diff changeset	155 dropbear_assert(cbuf->used >= len);
108 10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	156 cbuf->used -= len;
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	157 cbuf->readpos = (cbuf->readpos + len) % cbuf->size;
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: diff changeset	158 }

Mercurial > dropbear

annotate circbuffer.c @ 1073:88043f9d40bd