annotate src/os/unix/ngx_writev_chain.c @ 455:295d97d70c69 release-0.1.2

nginx-0.1.2-RELEASE import *) Feature: the --user=USER, --group=GROUP, and --with-ld-opt=OPTIONS options in configure. *) Feature: the server_name directive supports *.domain.tld. *) Bugfix: the portability improvements. *) Bugfix: if configuration file was set in command line, the reconfiguration was impossible; the bug had appeared in 0.1.1. *) Bugfix: proxy module may get caught in an endless loop when sendfile is not used. *) Bugfix: with sendfile the response was not recoded according to the charset module directives; the bug had appeared in 0.1.1. *) Bugfix: very seldom bug in the kqueue processing. *) Bugfix: the gzip module compressed the proxied responses that was already compressed.
author Igor Sysoev <igor@sysoev.ru>
date Thu, 21 Oct 2004 15:34:38 +0000
parents 42d11f017717
children a88a3e4e158f
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
441
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4 */
da8c5707af39 nginx-0.1.0-2004-09-28-12:34:51 import; set copyright and remove unused files
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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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parents:
diff changeset
7 #include <ngx_config.h>
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
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parents:
diff changeset
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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694cd6cdb714 nginx-0.0.11-2004-09-17-20:07:35 import
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12 #define NGX_IOVS 8
694cd6cdb714 nginx-0.0.11-2004-09-17-20:07:35 import
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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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694cd6cdb714 nginx-0.0.11-2004-09-17-20:07:35 import
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17 u_char *prev;
694cd6cdb714 nginx-0.0.11-2004-09-17-20:07:35 import
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18 ssize_t n, size;
694cd6cdb714 nginx-0.0.11-2004-09-17-20:07:35 import
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19 off_t send, sprev, sent;
694cd6cdb714 nginx-0.0.11-2004-09-17-20:07:35 import
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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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34995c5ec6c4 nginx-0.0.1-2003-11-27-22:01:37 import
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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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33 #if (HAVE_KQUEUE)
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34
455
295d97d70c69 nginx-0.1.2-RELEASE import
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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");
70e1c7d2b83d nginx-0.0.2-2004-02-11-20:08:49 import
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38
70e1c7d2b83d nginx-0.0.2-2004-02-11-20:08:49 import
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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 }
70e1c7d2b83d nginx-0.0.2-2004-02-11-20:08:49 import
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42
70e1c7d2b83d nginx-0.0.2-2004-02-11-20:08:49 import
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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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7650aea1816f nginx-0.0.7-2004-06-21-19:59:32 import
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45 send = 0;
7650aea1816f nginx-0.0.7-2004-06-21-19:59:32 import
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46 complete = 0;
7650aea1816f nginx-0.0.7-2004-06-21-19:59:32 import
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47
429
694cd6cdb714 nginx-0.0.11-2004-09-17-20:07:35 import
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48 vec.elts = iovs;
694cd6cdb714 nginx-0.0.11-2004-09-17-20:07:35 import
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49 vec.size = sizeof(struct iovec);
694cd6cdb714 nginx-0.0.11-2004-09-17-20:07:35 import
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50 vec.nalloc = NGX_IOVS;
694cd6cdb714 nginx-0.0.11-2004-09-17-20:07:35 import
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51 vec.pool = c->pool;
694cd6cdb714 nginx-0.0.11-2004-09-17-20:07:35 import
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52
362
7650aea1816f nginx-0.0.7-2004-06-21-19:59:32 import
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diff changeset
53 for ( ;; ) {
198
34995c5ec6c4 nginx-0.0.1-2003-11-27-22:01:37 import
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54 prev = NULL;
34995c5ec6c4 nginx-0.0.1-2003-11-27-22:01:37 import
Igor Sysoev <igor@sysoev.ru>
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55 iov = NULL;
34995c5ec6c4 nginx-0.0.1-2003-11-27-22:01:37 import
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56 eintr = 0;
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57 sprev = send;
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58
429
694cd6cdb714 nginx-0.0.11-2004-09-17-20:07:35 import
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59 vec.nelts = 0;
694cd6cdb714 nginx-0.0.11-2004-09-17-20:07:35 import
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parents: 375
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60
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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parents: 290
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61 /* create the iovec and coalesce the neighbouring bufs */
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62
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7650aea1816f nginx-0.0.7-2004-06-21-19:59:32 import
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63 for (cl = in; cl && vec.nelts < IOV_MAX && send < limit; cl = cl->next)
7650aea1816f nginx-0.0.7-2004-06-21-19:59:32 import
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64 {
7650aea1816f nginx-0.0.7-2004-06-21-19:59:32 import
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65 if (ngx_buf_special(cl->buf)) {
7650aea1816f nginx-0.0.7-2004-06-21-19:59:32 import
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66 continue;
7650aea1816f nginx-0.0.7-2004-06-21-19:59:32 import
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67 }
7650aea1816f nginx-0.0.7-2004-06-21-19:59:32 import
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68
7650aea1816f nginx-0.0.7-2004-06-21-19:59:32 import
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69 size = cl->buf->last - cl->buf->pos;
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70
7650aea1816f nginx-0.0.7-2004-06-21-19:59:32 import
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71 if (send + size > limit) {
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72 size = limit - send;
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73 }
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74
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diff changeset
75 if (prev == cl->buf->pos) {
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76 iov->iov_len += size;
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77
198
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78 } else {
429
694cd6cdb714 nginx-0.0.11-2004-09-17-20:07:35 import
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79 if (!(iov = ngx_array_push(&vec))) {
694cd6cdb714 nginx-0.0.11-2004-09-17-20:07:35 import
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80 return NGX_CHAIN_ERROR;
694cd6cdb714 nginx-0.0.11-2004-09-17-20:07:35 import
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81 }
694cd6cdb714 nginx-0.0.11-2004-09-17-20:07:35 import
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82
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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83 iov->iov_base = (void *) cl->buf->pos;
362
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84 iov->iov_len = size;
198
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85 }
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86
7650aea1816f nginx-0.0.7-2004-06-21-19:59:32 import
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87 prev = cl->buf->pos + size;
7650aea1816f nginx-0.0.7-2004-06-21-19:59:32 import
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diff changeset
88 send += size;
93
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parents:
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89 }
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
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parents:
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90
362
7650aea1816f nginx-0.0.7-2004-06-21-19:59:32 import
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diff changeset
91 n = writev(c->fd, vec.elts, vec.nelts);
93
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92
198
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diff changeset
93 if (n == -1) {
34995c5ec6c4 nginx-0.0.1-2003-11-27-22:01:37 import
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parents: 195
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94 err = ngx_errno;
93
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95
257
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parents: 198
diff changeset
96 if (err == NGX_EAGAIN || err == NGX_EINTR) {
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diff changeset
97 if (err == NGX_EINTR) {
70e1c7d2b83d nginx-0.0.2-2004-02-11-20:08:49 import
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parents: 198
diff changeset
98 eintr = 1;
70e1c7d2b83d nginx-0.0.2-2004-02-11-20:08:49 import
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parents: 198
diff changeset
99 }
70e1c7d2b83d nginx-0.0.2-2004-02-11-20:08:49 import
Igor Sysoev <igor@sysoev.ru>
parents: 198
diff changeset
100
70e1c7d2b83d nginx-0.0.2-2004-02-11-20:08:49 import
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parents: 198
diff changeset
101 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
102 "writev() not ready");
93
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103
198
34995c5ec6c4 nginx-0.0.1-2003-11-27-22:01:37 import
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parents: 195
diff changeset
104 } else {
34995c5ec6c4 nginx-0.0.1-2003-11-27-22:01:37 import
Igor Sysoev <igor@sysoev.ru>
parents: 195
diff changeset
105 wev->error = 1;
257
70e1c7d2b83d nginx-0.0.2-2004-02-11-20:08:49 import
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parents: 198
diff changeset
106 ngx_connection_error(c, err, "writev() failed");
198
34995c5ec6c4 nginx-0.0.1-2003-11-27-22:01:37 import
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parents: 195
diff changeset
107 return NGX_CHAIN_ERROR;
34995c5ec6c4 nginx-0.0.1-2003-11-27-22:01:37 import
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parents: 195
diff changeset
108 }
93
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
109 }
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
110
198
34995c5ec6c4 nginx-0.0.1-2003-11-27-22:01:37 import
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parents: 195
diff changeset
111 sent = n > 0 ? n : 0;
93
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
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parents:
diff changeset
112
257
70e1c7d2b83d nginx-0.0.2-2004-02-11-20:08:49 import
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parents: 198
diff changeset
113 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0,
70e1c7d2b83d nginx-0.0.2-2004-02-11-20:08:49 import
Igor Sysoev <igor@sysoev.ru>
parents: 198
diff changeset
114 "writev: " OFF_T_FMT, sent);
93
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
115
362
7650aea1816f nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents: 343
diff changeset
116 if (send - sprev == sent) {
7650aea1816f nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents: 343
diff changeset
117 complete = 1;
7650aea1816f nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents: 343
diff changeset
118 }
7650aea1816f nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents: 343
diff changeset
119
198
34995c5ec6c4 nginx-0.0.1-2003-11-27-22:01:37 import
Igor Sysoev <igor@sysoev.ru>
parents: 195
diff changeset
120 c->sent += sent;
93
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
121
198
34995c5ec6c4 nginx-0.0.1-2003-11-27-22:01:37 import
Igor Sysoev <igor@sysoev.ru>
parents: 195
diff changeset
122 for (cl = in; cl && sent > 0; cl = cl->next) {
362
7650aea1816f nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents: 343
diff changeset
123 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
124 continue;
7650aea1816f nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents: 343
diff changeset
125 }
7650aea1816f nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents: 343
diff changeset
126
7650aea1816f nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents: 343
diff changeset
127 if (sent == 0) {
7650aea1816f nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents: 343
diff changeset
128 break;
7650aea1816f nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents: 343
diff changeset
129 }
93
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
130
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
131 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
132
198
34995c5ec6c4 nginx-0.0.1-2003-11-27-22:01:37 import
Igor Sysoev <igor@sysoev.ru>
parents: 195
diff changeset
133 if (sent >= size) {
34995c5ec6c4 nginx-0.0.1-2003-11-27-22:01:37 import
Igor Sysoev <igor@sysoev.ru>
parents: 195
diff changeset
134 sent -= size;
362
7650aea1816f nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents: 343
diff changeset
135 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
136
34995c5ec6c4 nginx-0.0.1-2003-11-27-22:01:37 import
Igor Sysoev <igor@sysoev.ru>
parents: 195
diff changeset
137 continue;
93
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
138 }
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
139
362
7650aea1816f nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents: 343
diff changeset
140 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
141
34995c5ec6c4 nginx-0.0.1-2003-11-27-22:01:37 import
Igor Sysoev <igor@sysoev.ru>
parents: 195
diff changeset
142 break;
93
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
143 }
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
144
362
7650aea1816f nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents: 343
diff changeset
145 if (eintr) {
7650aea1816f nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents: 343
diff changeset
146 continue;
7650aea1816f nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents: 343
diff changeset
147 }
93
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
148
362
7650aea1816f nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents: 343
diff changeset
149 if (!complete) {
7650aea1816f nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents: 343
diff changeset
150 wev->ready = 0;
7650aea1816f nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents: 343
diff changeset
151 return cl;
7650aea1816f nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents: 343
diff changeset
152 }
7650aea1816f nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents: 343
diff changeset
153
7650aea1816f nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents: 343
diff changeset
154 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
155 return cl;
7650aea1816f nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents: 343
diff changeset
156 }
7650aea1816f nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents: 343
diff changeset
157
7650aea1816f nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents: 343
diff changeset
158 in = cl;
93
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
159 }
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
160 }