Mercurial > hg > nginx
annotate src/os/unix/ngx_writev_chain.c @ 429:694cd6cdb714
nginx-0.0.11-2004-09-17-20:07:35 import
author | Igor Sysoev <igor@sysoev.ru> |
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date | Fri, 17 Sep 2004 16:07:35 +0000 |
parents | 744ccb59062d |
children | da8c5707af39 |
rev | line source |
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93
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1 |
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2 #include <ngx_config.h> |
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3 #include <ngx_core.h> |
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4 #include <ngx_event.h> |
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5 |
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7 #define NGX_IOVS 8 |
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8 |
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10 ngx_chain_t *ngx_writev_chain(ngx_connection_t *c, ngx_chain_t *in, off_t limit) |
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11 { |
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12 u_char *prev; |
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13 ssize_t n, size; |
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14 off_t send, sprev, sent; |
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15 ngx_uint_t eintr, complete; |
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16 ngx_err_t err; |
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17 ngx_array_t vec; |
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18 ngx_chain_t *cl; |
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19 ngx_event_t *wev; |
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20 struct iovec *iov, iovs[NGX_IOVS]; |
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21 |
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22 wev = c->write; |
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23 |
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24 if (!wev->ready) { |
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25 return in; |
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26 } |
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27 |
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28 #if (HAVE_KQUEUE) |
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29 |
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30 if ((ngx_event_flags & NGX_HAVE_KQUEUE_EVENT) && wev->pending_eof) { |
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31 ngx_log_error(NGX_LOG_INFO, c->log, wev->kq_errno, |
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32 "kevent() reported about an closed connection"); |
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33 |
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34 wev->error = 1; |
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35 return NGX_CHAIN_ERROR; |
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36 } |
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37 |
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38 #endif |
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39 |
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40 send = 0; |
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41 complete = 0; |
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42 |
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43 vec.elts = iovs; |
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44 vec.size = sizeof(struct iovec); |
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45 vec.nalloc = NGX_IOVS; |
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46 vec.pool = c->pool; |
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47 |
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48 for ( ;; ) { |
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49 prev = NULL; |
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50 iov = NULL; |
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51 eintr = 0; |
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52 sprev = send; |
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53 |
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54 vec.nelts = 0; |
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55 |
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56 /* create the iovec and coalesce the neighbouring bufs */ |
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57 |
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58 for (cl = in; cl && vec.nelts < IOV_MAX && send < limit; cl = cl->next) |
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59 { |
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60 if (ngx_buf_special(cl->buf)) { |
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61 continue; |
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62 } |
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63 |
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64 size = cl->buf->last - cl->buf->pos; |
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65 |
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66 if (send + size > limit) { |
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67 size = limit - send; |
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68 } |
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69 |
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70 if (prev == cl->buf->pos) { |
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71 iov->iov_len += size; |
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72 |
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73 } else { |
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74 if (!(iov = ngx_array_push(&vec))) { |
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75 return NGX_CHAIN_ERROR; |
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76 } |
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77 |
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78 iov->iov_base = (void *) cl->buf->pos; |
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79 iov->iov_len = size; |
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80 } |
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81 |
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82 prev = cl->buf->pos + size; |
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83 send += size; |
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84 } |
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85 |
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86 n = writev(c->fd, vec.elts, vec.nelts); |
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87 |
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88 if (n == -1) { |
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89 err = ngx_errno; |
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90 |
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91 if (err == NGX_EAGAIN || err == NGX_EINTR) { |
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92 if (err == NGX_EINTR) { |
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93 eintr = 1; |
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94 } |
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95 |
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96 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, err, |
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97 "writev() not ready"); |
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98 |
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99 } else { |
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100 wev->error = 1; |
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101 ngx_connection_error(c, err, "writev() failed"); |
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102 return NGX_CHAIN_ERROR; |
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Igor Sysoev <igor@sysoev.ru>
parents:
195
diff
changeset
|
103 } |
93
738fe44c70d5
nginx-0.0.1-2003-05-21-17:28:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
104 } |
738fe44c70d5
nginx-0.0.1-2003-05-21-17:28:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
105 |
198
34995c5ec6c4
nginx-0.0.1-2003-11-27-22:01:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
195
diff
changeset
|
106 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
|
107 |
257
70e1c7d2b83d
nginx-0.0.2-2004-02-11-20:08:49 import
Igor Sysoev <igor@sysoev.ru>
parents:
198
diff
changeset
|
108 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
|
109 "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
|
110 |
362
7650aea1816f
nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents:
343
diff
changeset
|
111 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
|
112 complete = 1; |
7650aea1816f
nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents:
343
diff
changeset
|
113 } |
7650aea1816f
nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents:
343
diff
changeset
|
114 |
198
34995c5ec6c4
nginx-0.0.1-2003-11-27-22:01:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
195
diff
changeset
|
115 c->sent += sent; |
93
738fe44c70d5
nginx-0.0.1-2003-05-21-17:28:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
116 |
198
34995c5ec6c4
nginx-0.0.1-2003-11-27-22:01:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
195
diff
changeset
|
117 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
|
118 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
|
119 continue; |
7650aea1816f
nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents:
343
diff
changeset
|
120 } |
7650aea1816f
nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents:
343
diff
changeset
|
121 |
7650aea1816f
nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents:
343
diff
changeset
|
122 if (sent == 0) { |
7650aea1816f
nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents:
343
diff
changeset
|
123 break; |
7650aea1816f
nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents:
343
diff
changeset
|
124 } |
93
738fe44c70d5
nginx-0.0.1-2003-05-21-17:28:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
125 |
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
|
126 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
|
127 |
198
34995c5ec6c4
nginx-0.0.1-2003-11-27-22:01:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
195
diff
changeset
|
128 if (sent >= size) { |
34995c5ec6c4
nginx-0.0.1-2003-11-27-22:01:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
195
diff
changeset
|
129 sent -= size; |
362
7650aea1816f
nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents:
343
diff
changeset
|
130 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
|
131 |
34995c5ec6c4
nginx-0.0.1-2003-11-27-22:01:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
195
diff
changeset
|
132 continue; |
93
738fe44c70d5
nginx-0.0.1-2003-05-21-17:28:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
133 } |
738fe44c70d5
nginx-0.0.1-2003-05-21-17:28:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
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 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
|
136 |
34995c5ec6c4
nginx-0.0.1-2003-11-27-22:01:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
195
diff
changeset
|
137 break; |
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 if (eintr) { |
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 } |
93
738fe44c70d5
nginx-0.0.1-2003-05-21-17:28:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
143 |
362
7650aea1816f
nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents:
343
diff
changeset
|
144 if (!complete) { |
7650aea1816f
nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents:
343
diff
changeset
|
145 wev->ready = 0; |
7650aea1816f
nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents:
343
diff
changeset
|
146 return cl; |
7650aea1816f
nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents:
343
diff
changeset
|
147 } |
7650aea1816f
nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents:
343
diff
changeset
|
148 |
7650aea1816f
nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents:
343
diff
changeset
|
149 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
|
150 return cl; |
7650aea1816f
nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents:
343
diff
changeset
|
151 } |
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 in = cl; |
93
738fe44c70d5
nginx-0.0.1-2003-05-21-17:28:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
154 } |
738fe44c70d5
nginx-0.0.1-2003-05-21-17:28:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
155 } |