Mercurial > hg > nginx-quic
annotate src/os/unix/ngx_writev_chain.c @ 3019:56d1e38a0dda
delete mistaken sleep in the previous commit
author | Igor Sysoev <igor@sysoev.ru> |
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date | Mon, 10 Aug 2009 14:45:52 +0000 |
parents | f69d1aab6a0f |
children | 6f6d7ea70805 |
rev | line source |
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1 |
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2 /* |
444
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3 * Copyright (C) Igor Sysoev |
441
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4 */ |
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5 |
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6 |
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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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10 |
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11 |
597 | 12 #if (IOV_MAX > 64) |
13 #define NGX_IOVS 64 | |
14 #else | |
15 #define NGX_IOVS IOV_MAX | |
16 #endif | |
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17 |
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18 |
501 | 19 ngx_chain_t * |
20 ngx_writev_chain(ngx_connection_t *c, ngx_chain_t *in, off_t limit) | |
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21 { |
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22 u_char *prev; |
461 | 23 ssize_t n, size, sent; |
473 | 24 off_t send, prev_send; |
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25 ngx_uint_t eintr, complete; |
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26 ngx_err_t err; |
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27 ngx_array_t vec; |
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28 ngx_chain_t *cl; |
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29 ngx_event_t *wev; |
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30 struct iovec *iov, iovs[NGX_IOVS]; |
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31 |
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32 wev = c->write; |
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33 |
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34 if (!wev->ready) { |
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35 return in; |
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36 } |
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37 |
469 | 38 #if (NGX_HAVE_KQUEUE) |
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39 |
587 | 40 if ((ngx_event_flags & NGX_USE_KQUEUE_EVENT) && wev->pending_eof) { |
537 | 41 (void) ngx_connection_error(c, wev->kq_errno, |
42 "kevent() reported about an closed connection"); | |
257
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43 wev->error = 1; |
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44 return NGX_CHAIN_ERROR; |
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45 } |
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46 |
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47 #endif |
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48 |
473 | 49 /* the maximum limit size is the maximum size_t value - the page size */ |
50 | |
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51 if (limit == 0 || limit > (off_t) (NGX_MAX_SIZE_T_VALUE - ngx_pagesize)) { |
477 | 52 limit = NGX_MAX_SIZE_T_VALUE - ngx_pagesize; |
473 | 53 } |
54 | |
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55 send = 0; |
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56 complete = 0; |
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57 |
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58 vec.elts = iovs; |
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59 vec.size = sizeof(struct iovec); |
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60 vec.nalloc = NGX_IOVS; |
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61 vec.pool = c->pool; |
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62 |
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63 for ( ;; ) { |
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64 prev = NULL; |
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65 iov = NULL; |
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66 eintr = 0; |
473 | 67 prev_send = send; |
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68 |
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69 vec.nelts = 0; |
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70 |
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71 /* create the iovec and coalesce the neighbouring bufs */ |
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72 |
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73 for (cl = in; cl && vec.nelts < IOV_MAX && send < limit; cl = cl->next) |
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74 { |
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75 if (ngx_buf_special(cl->buf)) { |
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76 continue; |
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77 } |
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78 |
461 | 79 #if 1 |
80 if (!ngx_buf_in_memory(cl->buf)) { | |
81 ngx_debug_point(); | |
82 } | |
83 #endif | |
84 | |
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85 size = cl->buf->last - cl->buf->pos; |
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86 |
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87 if (send + size > limit) { |
561 | 88 size = (ssize_t) (limit - send); |
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89 } |
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90 |
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91 if (prev == cl->buf->pos) { |
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92 iov->iov_len += size; |
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93 |
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94 } else { |
501 | 95 iov = ngx_array_push(&vec); |
96 if (iov == NULL) { | |
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97 return NGX_CHAIN_ERROR; |
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98 } |
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99 |
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100 iov->iov_base = (void *) cl->buf->pos; |
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101 iov->iov_len = size; |
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102 } |
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103 |
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104 prev = cl->buf->pos + size; |
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105 send += size; |
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106 } |
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107 |
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108 n = writev(c->fd, vec.elts, vec.nelts); |
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109 |
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110 if (n == -1) { |
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111 err = ngx_errno; |
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112 |
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113 if (err == NGX_EAGAIN || err == NGX_EINTR) { |
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114 if (err == NGX_EINTR) { |
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115 eintr = 1; |
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116 } |
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117 |
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118 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, err, |
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119 "writev() not ready"); |
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120 |
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121 } else { |
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122 wev->error = 1; |
537 | 123 (void) ngx_connection_error(c, err, "writev() failed"); |
198
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124 return NGX_CHAIN_ERROR; |
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125 } |
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126 } |
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|
127 |
198
34995c5ec6c4
nginx-0.0.1-2003-11-27-22:01:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
195
diff
changeset
|
128 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
|
129 |
461 | 130 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
|
131 |
473 | 132 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
|
133 complete = 1; |
7650aea1816f
nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents:
343
diff
changeset
|
134 } |
7650aea1816f
nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents:
343
diff
changeset
|
135 |
198
34995c5ec6c4
nginx-0.0.1-2003-11-27-22:01:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
195
diff
changeset
|
136 c->sent += sent; |
93
738fe44c70d5
nginx-0.0.1-2003-05-21-17:28:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
137 |
461 | 138 for (cl = in; cl; cl = cl->next) { |
139 | |
362
7650aea1816f
nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents:
343
diff
changeset
|
140 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
|
141 continue; |
7650aea1816f
nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents:
343
diff
changeset
|
142 } |
7650aea1816f
nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents:
343
diff
changeset
|
143 |
7650aea1816f
nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents:
343
diff
changeset
|
144 if (sent == 0) { |
7650aea1816f
nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents:
343
diff
changeset
|
145 break; |
7650aea1816f
nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents:
343
diff
changeset
|
146 } |
93
738fe44c70d5
nginx-0.0.1-2003-05-21-17:28:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
147 |
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
|
148 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
|
149 |
198
34995c5ec6c4
nginx-0.0.1-2003-11-27-22:01:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
195
diff
changeset
|
150 if (sent >= size) { |
34995c5ec6c4
nginx-0.0.1-2003-11-27-22:01:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
195
diff
changeset
|
151 sent -= size; |
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 = 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
|
153 |
34995c5ec6c4
nginx-0.0.1-2003-11-27-22:01:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
195
diff
changeset
|
154 continue; |
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 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
|
158 |
34995c5ec6c4
nginx-0.0.1-2003-11-27-22:01:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
195
diff
changeset
|
159 break; |
93
738fe44c70d5
nginx-0.0.1-2003-05-21-17:28:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
160 } |
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 (eintr) { |
7650aea1816f
nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents:
343
diff
changeset
|
163 continue; |
7650aea1816f
nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents:
343
diff
changeset
|
164 } |
93
738fe44c70d5
nginx-0.0.1-2003-05-21-17:28:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
165 |
362
7650aea1816f
nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents:
343
diff
changeset
|
166 if (!complete) { |
7650aea1816f
nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents:
343
diff
changeset
|
167 wev->ready = 0; |
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 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
|
172 return cl; |
7650aea1816f
nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents:
343
diff
changeset
|
173 } |
7650aea1816f
nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents:
343
diff
changeset
|
174 |
7650aea1816f
nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents:
343
diff
changeset
|
175 in = cl; |
93
738fe44c70d5
nginx-0.0.1-2003-05-21-17:28:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
176 } |
738fe44c70d5
nginx-0.0.1-2003-05-21-17:28:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
177 } |