Mercurial > hg > nginx
annotate src/os/unix/ngx_writev_chain.c @ 5853:a6e83ac70af9
Reduced difference between the send chain functions.
No functional changes. This follows the change from ad137a80919f.
author | Valentin Bartenev <vbart@nginx.com> |
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date | Wed, 13 Aug 2014 15:11:45 +0400 |
parents | 150df089fe47 |
children | b63e829621ab |
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 |
597 | 13 #if (IOV_MAX > 64) |
14 #define NGX_IOVS 64 | |
15 #else | |
16 #define NGX_IOVS IOV_MAX | |
17 #endif | |
429
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18 |
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19 |
501 | 20 ngx_chain_t * |
21 ngx_writev_chain(ngx_connection_t *c, ngx_chain_t *in, off_t limit) | |
93
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22 { |
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23 u_char *prev; |
461 | 24 ssize_t n, size, sent; |
473 | 25 off_t send, prev_send; |
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26 ngx_uint_t eintr; |
429
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27 ngx_err_t err; |
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28 ngx_array_t vec; |
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29 ngx_chain_t *cl; |
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30 ngx_event_t *wev; |
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31 struct iovec *iov, iovs[NGX_IOVS]; |
93
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32 |
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33 wev = c->write; |
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34 |
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35 if (!wev->ready) { |
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36 return in; |
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37 } |
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38 |
469 | 39 #if (NGX_HAVE_KQUEUE) |
257
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40 |
587 | 41 if ((ngx_event_flags & NGX_USE_KQUEUE_EVENT) && wev->pending_eof) { |
537 | 42 (void) ngx_connection_error(c, wev->kq_errno, |
43 "kevent() reported about an closed connection"); | |
257
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44 wev->error = 1; |
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45 return NGX_CHAIN_ERROR; |
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46 } |
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47 |
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48 #endif |
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49 |
473 | 50 /* the maximum limit size is the maximum size_t value - the page size */ |
51 | |
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52 if (limit == 0 || limit > (off_t) (NGX_MAX_SIZE_T_VALUE - ngx_pagesize)) { |
477 | 53 limit = NGX_MAX_SIZE_T_VALUE - ngx_pagesize; |
473 | 54 } |
55 | |
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56 send = 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 && 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 { |
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95 if (vec.nelts >= IOV_MAX) { |
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96 break; |
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97 } |
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98 |
501 | 99 iov = ngx_array_push(&vec); |
100 if (iov == NULL) { | |
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101 return NGX_CHAIN_ERROR; |
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102 } |
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103 |
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104 iov->iov_base = (void *) cl->buf->pos; |
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105 iov->iov_len = size; |
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106 } |
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107 |
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108 prev = cl->buf->pos + size; |
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109 send += size; |
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110 } |
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111 |
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112 n = writev(c->fd, vec.elts, vec.nelts); |
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113 |
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114 if (n == -1) { |
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115 err = ngx_errno; |
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116 |
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117 switch (err) { |
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118 case NGX_EAGAIN: |
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119 break; |
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120 |
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121 case NGX_EINTR: |
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122 eintr = 1; |
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123 break; |
93
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124 |
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125 default: |
198
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126 wev->error = 1; |
537 | 127 (void) ngx_connection_error(c, err, "writev() failed"); |
198
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128 return NGX_CHAIN_ERROR; |
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129 } |
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130 |
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refactor EAGAIN/EINTR processing
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parents:
1354
diff
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131 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, err, |
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refactor EAGAIN/EINTR processing
Igor Sysoev <igor@sysoev.ru>
parents:
1354
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132 "writev() not ready"); |
93
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nginx-0.0.1-2003-05-21-17:28:21 import
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133 } |
738fe44c70d5
nginx-0.0.1-2003-05-21-17:28:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
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134 |
198
34995c5ec6c4
nginx-0.0.1-2003-11-27-22:01:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
195
diff
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135 sent = n > 0 ? n : 0; |
93
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nginx-0.0.1-2003-05-21-17:28:21 import
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parents:
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136 |
461 | 137 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0, "writev: %z", sent); |
93
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nginx-0.0.1-2003-05-21-17:28:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
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138 |
198
34995c5ec6c4
nginx-0.0.1-2003-11-27-22:01:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
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diff
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139 c->sent += sent; |
93
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nginx-0.0.1-2003-05-21-17:28:21 import
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parents:
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140 |
5853
a6e83ac70af9
Reduced difference between the send chain functions.
Valentin Bartenev <vbart@nginx.com>
parents:
5851
diff
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141 in = ngx_handle_sent_chain(in, sent); |
93
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nginx-0.0.1-2003-05-21-17:28:21 import
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parents:
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142 |
362
7650aea1816f
nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents:
343
diff
changeset
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143 if (eintr) { |
7650aea1816f
nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents:
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diff
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144 continue; |
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nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents:
343
diff
changeset
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145 } |
93
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nginx-0.0.1-2003-05-21-17:28:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
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146 |
5851
150df089fe47
Removed the "complete" variable from various send chain functions.
Valentin Bartenev <vbart@nginx.com>
parents:
5850
diff
changeset
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147 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
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148 wev->ready = 0; |
5853
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Reduced difference between the send chain functions.
Valentin Bartenev <vbart@nginx.com>
parents:
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diff
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149 return in; |
362
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nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents:
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diff
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150 } |
7650aea1816f
nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents:
343
diff
changeset
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151 |
5853
a6e83ac70af9
Reduced difference between the send chain functions.
Valentin Bartenev <vbart@nginx.com>
parents:
5851
diff
changeset
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152 if (send >= limit || in == NULL) { |
a6e83ac70af9
Reduced difference between the send chain functions.
Valentin Bartenev <vbart@nginx.com>
parents:
5851
diff
changeset
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153 return in; |
362
7650aea1816f
nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents:
343
diff
changeset
|
154 } |
93
738fe44c70d5
nginx-0.0.1-2003-05-21-17:28:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
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155 } |
738fe44c70d5
nginx-0.0.1-2003-05-21-17:28:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
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156 } |