Mercurial > hg > nginx-quic
annotate src/os/unix/ngx_writev_chain.c @ 5856:1b8459a53e4b
Avoided to add duplicate hash key in ngx_http_types_slot().
author | Gu Feng <flygoast@126.com> |
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date | Wed, 17 Sep 2014 22:52:02 +0800 |
parents | b63e829621ab |
children | 6bbad2e73245 |
rev | line source |
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441
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1 |
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2 /* |
444
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3 * Copyright (C) Igor Sysoev |
4412 | 4 * Copyright (C) Nginx, Inc. |
441
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5 */ |
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6 |
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7 |
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8 #include <ngx_config.h> |
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9 #include <ngx_core.h> |
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10 #include <ngx_event.h> |
93
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11 |
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12 |
501 | 13 ngx_chain_t * |
14 ngx_writev_chain(ngx_connection_t *c, ngx_chain_t *in, off_t limit) | |
93
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15 { |
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16 u_char *prev; |
461 | 17 ssize_t n, size, sent; |
473 | 18 off_t send, prev_send; |
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19 ngx_uint_t eintr; |
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20 ngx_err_t err; |
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21 ngx_array_t vec; |
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22 ngx_chain_t *cl; |
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23 ngx_event_t *wev; |
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24 struct iovec *iov, iovs[NGX_IOVS_PREALLOCATE]; |
93
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25 |
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26 wev = c->write; |
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27 |
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28 if (!wev->ready) { |
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29 return in; |
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30 } |
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31 |
469 | 32 #if (NGX_HAVE_KQUEUE) |
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33 |
587 | 34 if ((ngx_event_flags & NGX_USE_KQUEUE_EVENT) && wev->pending_eof) { |
537 | 35 (void) ngx_connection_error(c, wev->kq_errno, |
36 "kevent() reported about an closed connection"); | |
257
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37 wev->error = 1; |
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38 return NGX_CHAIN_ERROR; |
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39 } |
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40 |
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41 #endif |
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42 |
473 | 43 /* the maximum limit size is the maximum size_t value - the page size */ |
44 | |
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45 if (limit == 0 || limit > (off_t) (NGX_MAX_SIZE_T_VALUE - ngx_pagesize)) { |
477 | 46 limit = NGX_MAX_SIZE_T_VALUE - ngx_pagesize; |
473 | 47 } |
48 | |
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49 send = 0; |
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50 |
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51 vec.elts = iovs; |
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52 vec.size = sizeof(struct iovec); |
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53 vec.nalloc = NGX_IOVS_PREALLOCATE; |
429
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54 vec.pool = c->pool; |
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55 |
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56 for ( ;; ) { |
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57 prev = NULL; |
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58 iov = NULL; |
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59 eintr = 0; |
473 | 60 prev_send = send; |
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61 |
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62 vec.nelts = 0; |
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63 |
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64 /* create the iovec and coalesce the neighbouring bufs */ |
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65 |
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66 for (cl = in; cl && send < limit; cl = cl->next) { |
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67 |
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68 if (ngx_buf_special(cl->buf)) { |
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69 continue; |
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70 } |
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71 |
461 | 72 #if 1 |
73 if (!ngx_buf_in_memory(cl->buf)) { | |
74 ngx_debug_point(); | |
75 } | |
76 #endif | |
77 | |
362
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78 size = cl->buf->last - cl->buf->pos; |
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79 |
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80 if (send + size > limit) { |
561 | 81 size = (ssize_t) (limit - send); |
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82 } |
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83 |
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84 if (prev == cl->buf->pos) { |
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85 iov->iov_len += size; |
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86 |
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87 } else { |
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88 if (vec.nelts >= IOV_MAX) { |
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89 break; |
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90 } |
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91 |
501 | 92 iov = ngx_array_push(&vec); |
93 if (iov == NULL) { | |
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94 return NGX_CHAIN_ERROR; |
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95 } |
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96 |
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97 iov->iov_base = (void *) cl->buf->pos; |
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98 iov->iov_len = size; |
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99 } |
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100 |
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101 prev = cl->buf->pos + size; |
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102 send += size; |
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103 } |
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104 |
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105 n = writev(c->fd, vec.elts, vec.nelts); |
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106 |
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107 if (n == -1) { |
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108 err = ngx_errno; |
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109 |
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110 switch (err) { |
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111 case NGX_EAGAIN: |
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112 break; |
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113 |
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114 case NGX_EINTR: |
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115 eintr = 1; |
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116 break; |
93
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117 |
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118 default: |
198
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119 wev->error = 1; |
537 | 120 (void) ngx_connection_error(c, err, "writev() failed"); |
198
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121 return NGX_CHAIN_ERROR; |
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122 } |
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123 |
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124 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, err, |
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125 "writev() not ready"); |
93
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nginx-0.0.1-2003-05-21-17:28:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
126 } |
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 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 |
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 |
5853
a6e83ac70af9
Reduced difference between the send chain functions.
Valentin Bartenev <vbart@nginx.com>
parents:
5851
diff
changeset
|
134 in = ngx_handle_sent_chain(in, sent); |
93
738fe44c70d5
nginx-0.0.1-2003-05-21-17:28:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
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 (eintr) { |
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 } |
93
738fe44c70d5
nginx-0.0.1-2003-05-21-17:28:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
139 |
5851
150df089fe47
Removed the "complete" variable from various send chain functions.
Valentin Bartenev <vbart@nginx.com>
parents:
5850
diff
changeset
|
140 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
|
141 wev->ready = 0; |
5853
a6e83ac70af9
Reduced difference between the send chain functions.
Valentin Bartenev <vbart@nginx.com>
parents:
5851
diff
changeset
|
142 return in; |
362
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 |
5853
a6e83ac70af9
Reduced difference between the send chain functions.
Valentin Bartenev <vbart@nginx.com>
parents:
5851
diff
changeset
|
145 if (send >= limit || in == NULL) { |
a6e83ac70af9
Reduced difference between the send chain functions.
Valentin Bartenev <vbart@nginx.com>
parents:
5851
diff
changeset
|
146 return in; |
362
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 } |
738fe44c70d5
nginx-0.0.1-2003-05-21-17:28:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
149 } |