Mercurial > hg > nginx

annotate src/os/unix/ngx_writev_chain.c @ 561:e48ebafc6939 release-0.3.2

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
nginx-0.3.2-RELEASE import *) Feature: the Sun Studio 10 C compiler support. *) Feature: the "proxy_upstream_max_fails", "proxy_upstream_fail_timeout", "fastcgi_upstream_max_fails", and "fastcgi_upstream_fail_timeout" directives.
author Igor Sysoev <igor@sysoev.ru>
date Wed, 12 Oct 2005 13:50:36 +0000
parents 7bd37aef1e7e
children 326634fb9d47
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 /*
444
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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ef8c87afcfc5 nginx-0.0.1-2003-10-12-20:49:16 import
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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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694cd6cdb714 nginx-0.0.11-2004-09-17-20:07:35 import
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694cd6cdb714 nginx-0.0.11-2004-09-17-20:07:35 import
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14
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d4ea69372b94 nginx-0.1.25-RELEASE import
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15 ngx_chain_t *
d4ea69372b94 nginx-0.1.25-RELEASE import
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16 ngx_writev_chain(ngx_connection_t *c, ngx_chain_t *in, off_t limit)
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17 {
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694cd6cdb714 nginx-0.0.11-2004-09-17-20:07:35 import
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18 u_char *prev;
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19 ssize_t n, size, sent;
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20 off_t send, prev_send;
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21 ngx_uint_t eintr, complete;
694cd6cdb714 nginx-0.0.11-2004-09-17-20:07:35 import
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22 ngx_err_t err;
694cd6cdb714 nginx-0.0.11-2004-09-17-20:07:35 import
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23 ngx_array_t vec;
694cd6cdb714 nginx-0.0.11-2004-09-17-20:07:35 import
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24 ngx_chain_t *cl;
694cd6cdb714 nginx-0.0.11-2004-09-17-20:07:35 import
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25 ngx_event_t *wev;
694cd6cdb714 nginx-0.0.11-2004-09-17-20:07:35 import
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26 struct iovec *iov, iovs[NGX_IOVS];
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27
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28 wev = c->write;
34995c5ec6c4 nginx-0.0.1-2003-11-27-22:01:37 import
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29
34995c5ec6c4 nginx-0.0.1-2003-11-27-22:01:37 import
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30 if (!wev->ready) {
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31 return in;
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32 }
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33
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34 #if (NGX_HAVE_KQUEUE)
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35
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295d97d70c69 nginx-0.1.2-RELEASE import
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36 if ((ngx_event_flags & NGX_USE_KQUEUE_EVENT) && wev->pending_eof) {
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c9ad0d9c7d59 nginx-0.1.43-RELEASE import
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37 (void) ngx_connection_error(c, wev->kq_errno,
c9ad0d9c7d59 nginx-0.1.43-RELEASE import
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38 "kevent() reported about an closed connection");
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39 wev->error = 1;
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40 return NGX_CHAIN_ERROR;
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41 }
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42
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43 #endif
70e1c7d2b83d nginx-0.0.2-2004-02-11-20:08:49 import
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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
477
ad1e9ebf93bb nginx-0.1.13-RELEASE import
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47 if (limit == 0 || limit > NGX_MAX_SIZE_T_VALUE - ngx_pagesize) {
ad1e9ebf93bb nginx-0.1.13-RELEASE import
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48 limit = NGX_MAX_SIZE_T_VALUE - ngx_pagesize;
473
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49 }
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50
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7650aea1816f nginx-0.0.7-2004-06-21-19:59:32 import
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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;
694cd6cdb714 nginx-0.0.11-2004-09-17-20:07:35 import
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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;
694cd6cdb714 nginx-0.0.11-2004-09-17-20:07:35 import
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58
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59 for ( ;; ) {
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34995c5ec6c4 nginx-0.0.1-2003-11-27-22:01:37 import
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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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694cd6cdb714 nginx-0.0.11-2004-09-17-20:07:35 import
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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
6bdf858bff8c nginx-0.0.3-2004-05-28-19:49:23 import; rename ngx_hunk_t to ngx_buf_t
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67 /* create the iovec and coalesce the neighbouring bufs */
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1bf718ce0dde nginx-0.0.1-2003-11-14-10:20:34 import
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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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e48ebafc6939 nginx-0.3.2-RELEASE import
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84 size = (ssize_t) (limit - send);
362
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85 }
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738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
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86
343
6bdf858bff8c nginx-0.0.3-2004-05-28-19:49:23 import; rename ngx_hunk_t to ngx_buf_t
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87 if (prev == cl->buf->pos) {
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7650aea1816f nginx-0.0.7-2004-06-21-19:59:32 import
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88 iov->iov_len += size;
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89
198
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90 } else {
501
d4ea69372b94 nginx-0.1.25-RELEASE import
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91 iov = ngx_array_push(&vec);
d4ea69372b94 nginx-0.1.25-RELEASE import
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92 if (iov == NULL) {
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93 return NGX_CHAIN_ERROR;
694cd6cdb714 nginx-0.0.11-2004-09-17-20:07:35 import
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94 }
694cd6cdb714 nginx-0.0.11-2004-09-17-20:07:35 import
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95
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6bdf858bff8c nginx-0.0.3-2004-05-28-19:49:23 import; rename ngx_hunk_t to ngx_buf_t
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96 iov->iov_base = (void *) cl->buf->pos;
362
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97 iov->iov_len = size;
198
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98 }
362
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99
7650aea1816f nginx-0.0.7-2004-06-21-19:59:32 import
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100 prev = cl->buf->pos + size;
7650aea1816f nginx-0.0.7-2004-06-21-19:59:32 import
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101 send += size;
93
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102 }
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103
362
7650aea1816f nginx-0.0.7-2004-06-21-19:59:32 import
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104 n = writev(c->fd, vec.elts, vec.nelts);
93
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105
198
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106 if (n == -1) {
34995c5ec6c4 nginx-0.0.1-2003-11-27-22:01:37 import
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107 err = ngx_errno;
93
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108
257
70e1c7d2b83d nginx-0.0.2-2004-02-11-20:08:49 import
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diff changeset
109 if (err == NGX_EAGAIN || err == NGX_EINTR) {
70e1c7d2b83d nginx-0.0.2-2004-02-11-20:08:49 import
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diff changeset
110 if (err == NGX_EINTR) {
70e1c7d2b83d nginx-0.0.2-2004-02-11-20:08:49 import
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diff changeset
111 eintr = 1;
70e1c7d2b83d nginx-0.0.2-2004-02-11-20:08:49 import
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parents: 198
diff changeset
112 }
70e1c7d2b83d nginx-0.0.2-2004-02-11-20:08:49 import
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parents: 198
diff changeset
113
70e1c7d2b83d nginx-0.0.2-2004-02-11-20:08:49 import
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diff changeset
114 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
115 "writev() not ready");
93
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116
198
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117 } else {
34995c5ec6c4 nginx-0.0.1-2003-11-27-22:01:37 import
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diff changeset
118 wev->error = 1;
537
c9ad0d9c7d59 nginx-0.1.43-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 501
diff changeset
119 (void) 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
120 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
121 }
93
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
122 }
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
123
198
34995c5ec6c4 nginx-0.0.1-2003-11-27-22:01:37 import
Igor Sysoev <igor@sysoev.ru>
parents: 195
diff changeset
124 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
125
461
a88a3e4e158f nginx-0.1.5-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 455
diff changeset
126 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
127
473
8e8f3af115b5 nginx-0.1.11-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 469
diff changeset
128 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
129 complete = 1;
7650aea1816f nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents: 343
diff changeset
130 }
7650aea1816f nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents: 343
diff changeset
131
198
34995c5ec6c4 nginx-0.0.1-2003-11-27-22:01:37 import
Igor Sysoev <igor@sysoev.ru>
parents: 195
diff changeset
132 c->sent += sent;
93
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
133
461
a88a3e4e158f nginx-0.1.5-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 455
diff changeset
134 for (cl = in; cl; cl = cl->next) {
a88a3e4e158f nginx-0.1.5-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 455
diff changeset
135
362
7650aea1816f nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents: 343
diff changeset
136 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
137 continue;
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
7650aea1816f nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents: 343
diff changeset
140 if (sent == 0) {
7650aea1816f nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents: 343
diff changeset
141 break;
7650aea1816f nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents: 343
diff changeset
142 }
93
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
143
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
144 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
145
198
34995c5ec6c4 nginx-0.0.1-2003-11-27-22:01:37 import
Igor Sysoev <igor@sysoev.ru>
parents: 195
diff changeset
146 if (sent >= size) {
34995c5ec6c4 nginx-0.0.1-2003-11-27-22:01:37 import
Igor Sysoev <igor@sysoev.ru>
parents: 195
diff changeset
147 sent -= size;
362
7650aea1816f nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents: 343
diff changeset
148 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
149
34995c5ec6c4 nginx-0.0.1-2003-11-27-22:01:37 import
Igor Sysoev <igor@sysoev.ru>
parents: 195
diff changeset
150 continue;
93
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
151 }
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
152
362
7650aea1816f nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents: 343
diff changeset
153 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
154
34995c5ec6c4 nginx-0.0.1-2003-11-27-22:01:37 import
Igor Sysoev <igor@sysoev.ru>
parents: 195
diff changeset
155 break;
93
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
156 }
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
157
362
7650aea1816f nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents: 343
diff changeset
158 if (eintr) {
7650aea1816f nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents: 343
diff changeset
159 continue;
7650aea1816f nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents: 343
diff changeset
160 }
93
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
161
362
7650aea1816f nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents: 343
diff changeset
162 if (!complete) {
7650aea1816f nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents: 343
diff changeset
163 wev->ready = 0;
7650aea1816f nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents: 343
diff changeset
164 return cl;
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
7650aea1816f nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents: 343
diff changeset
167 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
168 return cl;
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
7650aea1816f nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents: 343
diff changeset
171 in = cl;
93
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
172 }
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
173 }