annotate src/os/unix/ngx_writev_chain.c @ 473:8e8f3af115b5 release-0.1.11

nginx-0.1.11-RELEASE import *) Feature: the worker_priority directive. *) Change: both tcp_nopush and tcp_nodelay directives affect the transferred response. *) Bugfix: nginx did not call initgroups(). Thanks to Andrew Sitnikov and Andrei Nigmatulin. *) Change: now the ngx_http_autoindex_module shows the file size in the bytes. *) Bugfix: the ngx_http_autoindex_module returned the 500 error if the broken symlink was in a directory. *) Bugfix: the files bigger than 4G could not be transferred using sendfile. *) Bugfix: if the backend was resolved to several backends and there was an error while the response waiting then process may got caught in an endless loop. *) Bugfix: the worker process may exit with the "unknown cycle" message when the /dev/poll method was used. *) Bugfix: "close() channel failed" errors. *) Bugfix: the autodetection of the "nobody" and "nogroup" groups. *) Bugfix: the send_lowat directive did not work on Linux. *) Bugfix: the segmentation fault occurred if there was no events section in configuration. *) Bugfix: nginx could not be built on OpenBSD. *) Bugfix: the double slashes in "://" in the URI were converted to ":/".
author Igor Sysoev <igor@sysoev.ru>
date Thu, 02 Dec 2004 18:40:46 +0000
parents 2ff194b74f1e
children ad1e9ebf93bb
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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da8c5707af39 nginx-0.1.0-2004-09-28-12:34:51 import; set copyright and remove unused files
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1
da8c5707af39 nginx-0.1.0-2004-09-28-12:34:51 import; set copyright and remove unused files
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2 /*
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42d11f017717 nginx-0.1.0-2004-09-29-20:00:49 import; remove years from copyright
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3 * Copyright (C) Igor Sysoev
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4 */
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5
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738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
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6
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
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7 #include <ngx_config.h>
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8 #include <ngx_core.h>
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9 #include <ngx_event.h>
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11
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a88a3e4e158f nginx-0.1.5-RELEASE import
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12 #define NGX_IOVS 16
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13
694cd6cdb714 nginx-0.0.11-2004-09-17-20:07:35 import
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14
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7650aea1816f nginx-0.0.7-2004-06-21-19:59:32 import
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15 ngx_chain_t *ngx_writev_chain(ngx_connection_t *c, ngx_chain_t *in, off_t limit)
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16 {
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17 u_char *prev;
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18 ssize_t n, size, sent;
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19 off_t send, prev_send;
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20 ngx_uint_t eintr, complete;
694cd6cdb714 nginx-0.0.11-2004-09-17-20:07:35 import
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21 ngx_err_t err;
694cd6cdb714 nginx-0.0.11-2004-09-17-20:07:35 import
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22 ngx_array_t vec;
694cd6cdb714 nginx-0.0.11-2004-09-17-20:07:35 import
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23 ngx_chain_t *cl;
694cd6cdb714 nginx-0.0.11-2004-09-17-20:07:35 import
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24 ngx_event_t *wev;
694cd6cdb714 nginx-0.0.11-2004-09-17-20:07:35 import
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25 struct iovec *iov, iovs[NGX_IOVS];
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26
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27 wev = c->write;
34995c5ec6c4 nginx-0.0.1-2003-11-27-22:01:37 import
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28
34995c5ec6c4 nginx-0.0.1-2003-11-27-22:01:37 import
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29 if (!wev->ready) {
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30 return in;
ef8c87afcfc5 nginx-0.0.1-2003-10-12-20:49:16 import
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31 }
ef8c87afcfc5 nginx-0.0.1-2003-10-12-20:49:16 import
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32
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2ff194b74f1e nginx-0.1.9-RELEASE import
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33 #if (NGX_HAVE_KQUEUE)
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34
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35 if ((ngx_event_flags & NGX_USE_KQUEUE_EVENT) && wev->pending_eof) {
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36 ngx_log_error(NGX_LOG_INFO, c->log, wev->kq_errno,
70e1c7d2b83d nginx-0.0.2-2004-02-11-20:08:49 import
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37 "kevent() reported about an closed connection");
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38
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39 wev->error = 1;
70e1c7d2b83d nginx-0.0.2-2004-02-11-20:08:49 import
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40 return NGX_CHAIN_ERROR;
70e1c7d2b83d nginx-0.0.2-2004-02-11-20:08:49 import
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41 }
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42
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43 #endif
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44
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45 /* the maximum limit size is the maximum size_t value - the page size */
8e8f3af115b5 nginx-0.1.11-RELEASE import
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46
8e8f3af115b5 nginx-0.1.11-RELEASE import
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47 if (limit == 0 || limit > MAX_SIZE_T_VALUE - ngx_pagesize) {
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48 limit = MAX_SIZE_T_VALUE - ngx_pagesize;
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49 }
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50
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51 send = 0;
7650aea1816f nginx-0.0.7-2004-06-21-19:59:32 import
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52 complete = 0;
7650aea1816f nginx-0.0.7-2004-06-21-19:59:32 import
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53
429
694cd6cdb714 nginx-0.0.11-2004-09-17-20:07:35 import
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54 vec.elts = iovs;
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55 vec.size = sizeof(struct iovec);
694cd6cdb714 nginx-0.0.11-2004-09-17-20:07:35 import
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56 vec.nalloc = NGX_IOVS;
694cd6cdb714 nginx-0.0.11-2004-09-17-20:07:35 import
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57 vec.pool = c->pool;
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58
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59 for ( ;; ) {
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60 prev = NULL;
34995c5ec6c4 nginx-0.0.1-2003-11-27-22:01:37 import
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61 iov = NULL;
34995c5ec6c4 nginx-0.0.1-2003-11-27-22:01:37 import
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62 eintr = 0;
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63 prev_send = send;
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64
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65 vec.nelts = 0;
694cd6cdb714 nginx-0.0.11-2004-09-17-20:07:35 import
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66
343
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67 /* create the iovec and coalesce the neighbouring bufs */
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68
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69 for (cl = in; cl && vec.nelts < IOV_MAX && send < limit; cl = cl->next)
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70 {
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71 if (ngx_buf_special(cl->buf)) {
7650aea1816f nginx-0.0.7-2004-06-21-19:59:32 import
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72 continue;
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73 }
7650aea1816f nginx-0.0.7-2004-06-21-19:59:32 import
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74
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75 #if 1
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76 if (!ngx_buf_in_memory(cl->buf)) {
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77 ngx_debug_point();
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78 }
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79 #endif
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80
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81 size = cl->buf->last - cl->buf->pos;
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82
7650aea1816f nginx-0.0.7-2004-06-21-19:59:32 import
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83 if (send + size > limit) {
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84 size = limit - send;
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85 }
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86
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87 if (prev == cl->buf->pos) {
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88 iov->iov_len += size;
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89
198
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90 } else {
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91 if (!(iov = ngx_array_push(&vec))) {
694cd6cdb714 nginx-0.0.11-2004-09-17-20:07:35 import
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92 return NGX_CHAIN_ERROR;
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93 }
694cd6cdb714 nginx-0.0.11-2004-09-17-20:07:35 import
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94
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95 iov->iov_base = (void *) cl->buf->pos;
362
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96 iov->iov_len = size;
198
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97 }
362
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98
7650aea1816f nginx-0.0.7-2004-06-21-19:59:32 import
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99 prev = cl->buf->pos + size;
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100 send += size;
93
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101 }
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102
362
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103 n = writev(c->fd, vec.elts, vec.nelts);
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104
198
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105 if (n == -1) {
34995c5ec6c4 nginx-0.0.1-2003-11-27-22:01:37 import
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106 err = ngx_errno;
93
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107
257
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108 if (err == NGX_EAGAIN || err == NGX_EINTR) {
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109 if (err == NGX_EINTR) {
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110 eintr = 1;
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111 }
70e1c7d2b83d nginx-0.0.2-2004-02-11-20:08:49 import
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diff changeset
112
70e1c7d2b83d nginx-0.0.2-2004-02-11-20:08:49 import
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113 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, err,
70e1c7d2b83d nginx-0.0.2-2004-02-11-20:08:49 import
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diff changeset
114 "writev() not ready");
93
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115
198
34995c5ec6c4 nginx-0.0.1-2003-11-27-22:01:37 import
Igor Sysoev <igor@sysoev.ru>
parents: 195
diff changeset
116 } else {
34995c5ec6c4 nginx-0.0.1-2003-11-27-22:01:37 import
Igor Sysoev <igor@sysoev.ru>
parents: 195
diff changeset
117 wev->error = 1;
257
70e1c7d2b83d nginx-0.0.2-2004-02-11-20:08:49 import
Igor Sysoev <igor@sysoev.ru>
parents: 198
diff changeset
118 ngx_connection_error(c, err, "writev() failed");
198
34995c5ec6c4 nginx-0.0.1-2003-11-27-22:01:37 import
Igor Sysoev <igor@sysoev.ru>
parents: 195
diff changeset
119 return NGX_CHAIN_ERROR;
34995c5ec6c4 nginx-0.0.1-2003-11-27-22:01:37 import
Igor Sysoev <igor@sysoev.ru>
parents: 195
diff changeset
120 }
93
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
121 }
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
122
198
34995c5ec6c4 nginx-0.0.1-2003-11-27-22:01:37 import
Igor Sysoev <igor@sysoev.ru>
parents: 195
diff changeset
123 sent = n > 0 ? n : 0;
93
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
124
461
a88a3e4e158f nginx-0.1.5-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 455
diff changeset
125 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0, "writev: %z", sent);
93
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
126
473
8e8f3af115b5 nginx-0.1.11-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 469
diff changeset
127 if (send - prev_send == sent) {
362
7650aea1816f nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents: 343
diff changeset
128 complete = 1;
7650aea1816f nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents: 343
diff changeset
129 }
7650aea1816f nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents: 343
diff changeset
130
198
34995c5ec6c4 nginx-0.0.1-2003-11-27-22:01:37 import
Igor Sysoev <igor@sysoev.ru>
parents: 195
diff changeset
131 c->sent += sent;
93
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
132
461
a88a3e4e158f nginx-0.1.5-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 455
diff changeset
133 for (cl = in; cl; cl = cl->next) {
a88a3e4e158f nginx-0.1.5-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 455
diff changeset
134
362
7650aea1816f nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents: 343
diff changeset
135 if (ngx_buf_special(cl->buf)) {
7650aea1816f nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents: 343
diff changeset
136 continue;
7650aea1816f nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents: 343
diff changeset
137 }
7650aea1816f nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents: 343
diff changeset
138
7650aea1816f nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents: 343
diff changeset
139 if (sent == 0) {
7650aea1816f nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents: 343
diff changeset
140 break;
7650aea1816f nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents: 343
diff changeset
141 }
93
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
142
343
6bdf858bff8c nginx-0.0.3-2004-05-28-19:49:23 import; rename ngx_hunk_t to ngx_buf_t
Igor Sysoev <igor@sysoev.ru>
parents: 290
diff changeset
143 size = cl->buf->last - cl->buf->pos;
93
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
144
198
34995c5ec6c4 nginx-0.0.1-2003-11-27-22:01:37 import
Igor Sysoev <igor@sysoev.ru>
parents: 195
diff changeset
145 if (sent >= size) {
34995c5ec6c4 nginx-0.0.1-2003-11-27-22:01:37 import
Igor Sysoev <igor@sysoev.ru>
parents: 195
diff changeset
146 sent -= size;
362
7650aea1816f nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents: 343
diff changeset
147 cl->buf->pos = cl->buf->last;
198
34995c5ec6c4 nginx-0.0.1-2003-11-27-22:01:37 import
Igor Sysoev <igor@sysoev.ru>
parents: 195
diff changeset
148
34995c5ec6c4 nginx-0.0.1-2003-11-27-22:01:37 import
Igor Sysoev <igor@sysoev.ru>
parents: 195
diff changeset
149 continue;
93
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
150 }
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
151
362
7650aea1816f nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents: 343
diff changeset
152 cl->buf->pos += sent;
198
34995c5ec6c4 nginx-0.0.1-2003-11-27-22:01:37 import
Igor Sysoev <igor@sysoev.ru>
parents: 195
diff changeset
153
34995c5ec6c4 nginx-0.0.1-2003-11-27-22:01:37 import
Igor Sysoev <igor@sysoev.ru>
parents: 195
diff changeset
154 break;
93
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
155 }
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
156
362
7650aea1816f nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents: 343
diff changeset
157 if (eintr) {
7650aea1816f nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents: 343
diff changeset
158 continue;
7650aea1816f nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents: 343
diff changeset
159 }
93
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
160
362
7650aea1816f nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents: 343
diff changeset
161 if (!complete) {
7650aea1816f nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents: 343
diff changeset
162 wev->ready = 0;
7650aea1816f nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents: 343
diff changeset
163 return cl;
7650aea1816f nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents: 343
diff changeset
164 }
7650aea1816f nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents: 343
diff changeset
165
7650aea1816f nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents: 343
diff changeset
166 if (send >= limit || cl == NULL) {
7650aea1816f nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents: 343
diff changeset
167 return cl;
7650aea1816f nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents: 343
diff changeset
168 }
7650aea1816f nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents: 343
diff changeset
169
7650aea1816f nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents: 343
diff changeset
170 in = cl;
93
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
171 }
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
172 }