Mercurial > hg > nginx-quic
annotate src/os/unix/ngx_readv_chain.c @ 2776:88987e52be42
style fix
author | Igor Sysoev <igor@sysoev.ru> |
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date | Wed, 29 Apr 2009 13:08:10 +0000 |
parents | 387450de0b4d |
children | ac33852faaac |
rev | line source |
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1 |
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2 /* |
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3 * Copyright (C) Igor Sysoev |
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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 |
501 | 12 #define NGX_IOVS 16 |
13 | |
14 | |
469 | 15 #if (NGX_HAVE_KQUEUE) |
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16 |
501 | 17 ssize_t |
18 ngx_readv_chain(ngx_connection_t *c, ngx_chain_t *chain) | |
73
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19 { |
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20 u_char *prev; |
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21 ssize_t n, size; |
74
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22 ngx_err_t err; |
501 | 23 ngx_array_t vec; |
188
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24 ngx_event_t *rev; |
501 | 25 struct iovec *iov, iovs[NGX_IOVS]; |
188
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26 |
577 | 27 rev = c->read; |
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28 |
455 | 29 if (ngx_event_flags & NGX_USE_KQUEUE_EVENT) { |
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30 ngx_log_debug3(NGX_LOG_DEBUG_EVENT, c->log, 0, |
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31 "readv: eof:%d, avail:%d, err:%d", |
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32 rev->pending_eof, rev->available, rev->kq_errno); |
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33 |
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34 if (rev->available == 0) { |
587 | 35 if (rev->pending_eof) { |
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36 rev->ready = 0; |
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37 rev->eof = 1; |
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38 |
587 | 39 ngx_log_error(NGX_LOG_INFO, c->log, rev->kq_errno, |
40 "kevent() reported about an closed connection"); | |
41 | |
188
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42 if (rev->kq_errno) { |
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43 rev->error = 1; |
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44 ngx_set_socket_errno(rev->kq_errno); |
587 | 45 return NGX_ERROR; |
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46 } |
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47 |
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48 return 0; |
587 | 49 |
50 } else { | |
51 return NGX_AGAIN; | |
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52 } |
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53 } |
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54 } |
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55 |
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56 prev = NULL; |
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57 iov = NULL; |
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58 size = 0; |
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59 |
501 | 60 vec.elts = iovs; |
61 vec.nelts = 0; | |
62 vec.size = sizeof(struct iovec); | |
63 vec.nalloc = NGX_IOVS; | |
64 vec.pool = c->pool; | |
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65 |
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66 /* coalesce the neighbouring bufs */ |
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67 |
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68 while (chain) { |
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69 if (prev == chain->buf->last) { |
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70 iov->iov_len += chain->buf->end - chain->buf->last; |
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71 |
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72 } else { |
501 | 73 iov = ngx_array_push(&vec); |
74 if (iov == NULL) { | |
75 return NGX_ERROR; | |
76 } | |
77 | |
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78 iov->iov_base = (void *) chain->buf->last; |
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79 iov->iov_len = chain->buf->end - chain->buf->last; |
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80 } |
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81 |
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82 size += chain->buf->end - chain->buf->last; |
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83 prev = chain->buf->end; |
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84 chain = chain->next; |
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85 } |
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86 |
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87 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0, |
501 | 88 "readv: %d, last:%d", vec.nelts, iov->iov_len); |
75
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89 |
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90 rev = c->read; |
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91 |
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92 do { |
501 | 93 n = readv(c->fd, (struct iovec *) vec.elts, vec.nelts); |
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94 |
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95 if (n >= 0) { |
455 | 96 if (ngx_event_flags & NGX_USE_KQUEUE_EVENT) { |
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97 rev->available -= n; |
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98 |
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99 /* |
587 | 100 * rev->available may be negative here because some additional |
101 * bytes may be received between kevent() and recv() | |
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102 */ |
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103 |
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104 if (rev->available <= 0) { |
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105 if (!rev->pending_eof) { |
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106 rev->ready = 0; |
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107 } |
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108 |
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109 if (rev->available < 0) { |
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110 rev->available = 0; |
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111 } |
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112 } |
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113 |
605 | 114 if (n == 0) { |
115 | |
116 /* | |
117 * on FreeBSD recv() may return 0 on closed socket | |
118 * even if kqueue reported about available data | |
119 */ | |
120 | |
627 | 121 #if 0 |
605 | 122 ngx_log_error(NGX_LOG_ALERT, c->log, 0, |
609 | 123 "readv() returned 0 while kevent() reported " |
605 | 124 "%d available bytes", rev->available); |
627 | 125 #endif |
605 | 126 |
127 rev->eof = 1; | |
128 rev->available = 0; | |
129 } | |
130 | |
188
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131 return n; |
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132 } |
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133 |
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134 if (n < size) { |
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135 rev->ready = 0; |
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136 } |
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137 |
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138 if (n == 0) { |
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139 rev->eof = 1; |
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140 } |
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141 |
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142 return n; |
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143 } |
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144 |
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145 err = ngx_socket_errno; |
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146 |
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147 if (err == NGX_EAGAIN || err == NGX_EINTR) { |
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148 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, err, |
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149 "readv() not ready"); |
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150 n = NGX_AGAIN; |
188
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151 |
257
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152 } else { |
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153 n = ngx_connection_error(c, err, "readv() failed"); |
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154 break; |
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155 } |
188
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156 |
257
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157 } while (err == NGX_EINTR); |
188
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158 |
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159 rev->ready = 0; |
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160 |
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161 if (n == NGX_ERROR){ |
164
84036764e215
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parents:
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162 c->read->error = 1; |
73
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163 } |
4534060fde92
nginx-0.0.1-2003-04-10-19:08:54 import
Igor Sysoev <igor@sysoev.ru>
parents:
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164 |
4534060fde92
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165 return n; |
4534060fde92
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166 } |
188
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167 |
469 | 168 #else /* ! NGX_HAVE_KQUEUE */ |
188
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169 |
501 | 170 ssize_t |
171 ngx_readv_chain(ngx_connection_t *c, ngx_chain_t *chain) | |
188
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172 { |
305
4b1a3a4acc60
nginx-0.0.3-2004-04-02-19:13:20 import
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173 u_char *prev; |
188
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174 ssize_t n, size; |
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175 ngx_err_t err; |
501 | 176 ngx_array_t vec; |
188
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177 ngx_event_t *rev; |
501 | 178 struct iovec *iov, iovs[NGX_IOVS]; |
188
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179 |
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180 prev = NULL; |
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181 iov = NULL; |
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182 size = 0; |
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183 |
501 | 184 vec.elts = iovs; |
185 vec.nelts = 0; | |
186 vec.size = sizeof(struct iovec); | |
187 vec.nalloc = NGX_IOVS; | |
188 vec.pool = c->pool; | |
188
0061d1f0908d
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189 |
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:
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diff
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190 /* coalesce the neighbouring bufs */ |
188
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191 |
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192 while (chain) { |
343
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nginx-0.0.3-2004-05-28-19:49:23 import; rename ngx_hunk_t to ngx_buf_t
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parents:
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193 if (prev == chain->buf->last) { |
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194 iov->iov_len += chain->buf->end - chain->buf->last; |
188
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195 |
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196 } else { |
501 | 197 iov = ngx_array_push(&vec); |
198 if (iov == NULL) { | |
199 return NGX_ERROR; | |
200 } | |
201 | |
561 | 202 iov->iov_base = (void *) chain->buf->last; |
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:
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|
203 iov->iov_len = chain->buf->end - chain->buf->last; |
188
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nginx-0.0.1-2003-11-18-11:04:34 import
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204 } |
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parents:
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205 |
343
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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:
328
diff
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|
206 size += chain->buf->end - chain->buf->last; |
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:
328
diff
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207 prev = chain->buf->end; |
188
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208 chain = chain->next; |
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209 } |
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210 |
257
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188
diff
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211 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0, |
501 | 212 "readv: %d:%d", vec.nelts, iov->iov_len); |
188
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213 |
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214 rev = c->read; |
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215 |
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|
216 do { |
501 | 217 n = readv(c->fd, (struct iovec *) vec.elts, vec.nelts); |
188
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218 |
328
fb4dfb2ac0fc
nginx-0.0.3-2004-04-28-10:14:50 import
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parents:
305
diff
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|
219 if (n == 0) { |
fb4dfb2ac0fc
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parents:
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diff
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|
220 rev->ready = 0; |
fb4dfb2ac0fc
nginx-0.0.3-2004-04-28-10:14:50 import
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parents:
305
diff
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|
221 rev->eof = 1; |
fb4dfb2ac0fc
nginx-0.0.3-2004-04-28-10:14:50 import
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parents:
305
diff
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|
222 |
fb4dfb2ac0fc
nginx-0.0.3-2004-04-28-10:14:50 import
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parents:
305
diff
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223 return n; |
fb4dfb2ac0fc
nginx-0.0.3-2004-04-28-10:14:50 import
Igor Sysoev <igor@sysoev.ru>
parents:
305
diff
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|
224 |
fb4dfb2ac0fc
nginx-0.0.3-2004-04-28-10:14:50 import
Igor Sysoev <igor@sysoev.ru>
parents:
305
diff
changeset
|
225 } else if (n > 0) { |
fb4dfb2ac0fc
nginx-0.0.3-2004-04-28-10:14:50 import
Igor Sysoev <igor@sysoev.ru>
parents:
305
diff
changeset
|
226 |
455 | 227 if (n < size && !(ngx_event_flags & NGX_USE_GREEDY_EVENT)) { |
188
0061d1f0908d
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228 rev->ready = 0; |
0061d1f0908d
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|
229 } |
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nginx-0.0.1-2003-11-18-11:04:34 import
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|
230 |
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nginx-0.0.1-2003-11-18-11:04:34 import
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231 return n; |
0061d1f0908d
nginx-0.0.1-2003-11-18-11:04:34 import
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parents:
164
diff
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|
232 } |
0061d1f0908d
nginx-0.0.1-2003-11-18-11:04:34 import
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parents:
164
diff
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|
233 |
257
70e1c7d2b83d
nginx-0.0.2-2004-02-11-20:08:49 import
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parents:
188
diff
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|
234 err = ngx_socket_errno; |
70e1c7d2b83d
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parents:
188
diff
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|
235 |
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nginx-0.0.2-2004-02-11-20:08:49 import
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parents:
188
diff
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|
236 if (err == NGX_EAGAIN || err == NGX_EINTR) { |
70e1c7d2b83d
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parents:
188
diff
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|
237 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, err, |
70e1c7d2b83d
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parents:
188
diff
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|
238 "readv() not ready"); |
70e1c7d2b83d
nginx-0.0.2-2004-02-11-20:08:49 import
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parents:
188
diff
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|
239 n = NGX_AGAIN; |
188
0061d1f0908d
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parents:
164
diff
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|
240 |
257
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nginx-0.0.2-2004-02-11-20:08:49 import
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parents:
188
diff
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|
241 } else { |
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nginx-0.0.2-2004-02-11-20:08:49 import
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parents:
188
diff
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|
242 n = ngx_connection_error(c, err, "readv() failed"); |
70e1c7d2b83d
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parents:
188
diff
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|
243 break; |
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nginx-0.0.2-2004-02-11-20:08:49 import
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parents:
188
diff
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|
244 } |
188
0061d1f0908d
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parents:
164
diff
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|
245 |
257
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nginx-0.0.2-2004-02-11-20:08:49 import
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parents:
188
diff
changeset
|
246 } while (err == NGX_EINTR); |
188
0061d1f0908d
nginx-0.0.1-2003-11-18-11:04:34 import
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parents:
164
diff
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|
247 |
0061d1f0908d
nginx-0.0.1-2003-11-18-11:04:34 import
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164
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|
248 rev->ready = 0; |
0061d1f0908d
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parents:
164
diff
changeset
|
249 |
0061d1f0908d
nginx-0.0.1-2003-11-18-11:04:34 import
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parents:
164
diff
changeset
|
250 if (n == NGX_ERROR){ |
0061d1f0908d
nginx-0.0.1-2003-11-18-11:04:34 import
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parents:
164
diff
changeset
|
251 c->read->error = 1; |
0061d1f0908d
nginx-0.0.1-2003-11-18-11:04:34 import
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parents:
164
diff
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|
252 } |
0061d1f0908d
nginx-0.0.1-2003-11-18-11:04:34 import
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parents:
164
diff
changeset
|
253 |
0061d1f0908d
nginx-0.0.1-2003-11-18-11:04:34 import
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parents:
164
diff
changeset
|
254 return n; |
0061d1f0908d
nginx-0.0.1-2003-11-18-11:04:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
164
diff
changeset
|
255 } |
0061d1f0908d
nginx-0.0.1-2003-11-18-11:04:34 import
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parents:
164
diff
changeset
|
256 |
469 | 257 #endif /* NGX_HAVE_KQUEUE */ |