Mercurial > hg > nginx-quic
annotate src/os/win32/ngx_wsasend_chain.c @ 2536:a6d6d762c554
small optimization: " == NGX_ERROR" > " != NGX_OK"
author | Igor Sysoev <igor@sysoev.ru> |
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date | Tue, 24 Feb 2009 10:42:23 +0000 |
parents | 4d9ea73a627a |
children | 02fb50962b11 |
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 |
441
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4 */ |
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5 |
103
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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 |
461 | 12 #define NGX_WSABUFS 8 |
13 | |
14 | |
501 | 15 ngx_chain_t * |
16 ngx_wsasend_chain(ngx_connection_t *c, ngx_chain_t *in, off_t limit) | |
103
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17 { |
184
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18 int rc; |
292
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19 u_char *prev; |
473 | 20 u_long size, sent, send, prev_send; |
461 | 21 ngx_uint_t complete; |
184
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22 ngx_err_t err; |
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23 ngx_event_t *wev; |
461 | 24 ngx_array_t vec; |
501 | 25 ngx_chain_t *cl; |
461 | 26 LPWSABUF wsabuf; |
27 WSABUF wsabufs[NGX_WSABUFS]; | |
184
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28 |
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29 wev = c->write; |
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30 |
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31 if (!wev->ready) { |
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32 return in; |
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33 } |
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34 |
473 | 35 /* the maximum limit size is the maximum u_long value - the page size */ |
36 | |
37 if (limit == 0 || limit > NGX_MAX_UINT32_VALUE - ngx_pagesize) { | |
38 limit = NGX_MAX_UINT32_VALUE - ngx_pagesize; | |
39 } | |
40 | |
461 | 41 send = 0; |
42 complete = 0; | |
43 | |
184
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44 /* |
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45 * WSABUFs must be 4-byte aligned otherwise |
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46 * WSASend() will return undocumented WSAEINVAL error. |
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47 */ |
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48 |
461 | 49 vec.elts = wsabufs; |
50 vec.size = sizeof(WSABUF); | |
577 | 51 vec.nalloc = NGX_WSABUFS; |
461 | 52 vec.pool = c->pool; |
184
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53 |
461 | 54 for ( ;; ) { |
55 prev = NULL; | |
56 wsabuf = NULL; | |
473 | 57 prev_send = send; |
184
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58 |
461 | 59 vec.nelts = 0; |
184
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60 |
461 | 61 /* create the WSABUF and coalesce the neighbouring bufs */ |
184
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62 |
461 | 63 for (cl = in; |
64 cl && vec.nelts < ngx_max_wsabufs && send < limit; | |
65 cl = cl->next) | |
66 { | |
67 if (ngx_buf_special(cl->buf)) { | |
68 continue; | |
69 } | |
184
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70 |
461 | 71 size = cl->buf->last - cl->buf->pos; |
184
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72 |
461 | 73 if (send + size > limit) { |
74 size = (u_long) (limit - send); | |
75 } | |
184
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76 |
461 | 77 if (prev == cl->buf->pos) { |
78 wsabuf->len += cl->buf->last - cl->buf->pos; | |
184
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79 |
461 | 80 } else { |
501 | 81 wsabuf = ngx_array_push(&vec); |
82 if (wsabuf == NULL) { | |
461 | 83 return NGX_CHAIN_ERROR; |
84 } | |
184
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85 |
461 | 86 wsabuf->buf = (char *) cl->buf->pos; |
87 wsabuf->len = cl->buf->last - cl->buf->pos; | |
184
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88 } |
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89 |
461 | 90 prev = cl->buf->last; |
91 send += size; | |
184
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92 } |
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93 |
461 | 94 sent = 0; |
95 | |
96 rc = WSASend(c->fd, vec.elts, vec.nelts, &sent, 0, NULL, NULL); | |
97 | |
98 if (rc == -1) { | |
99 err = ngx_errno; | |
100 | |
101 if (err == WSAEWOULDBLOCK) { | |
102 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, err, | |
103 "WSASend() not ready"); | |
104 | |
105 } else { | |
106 wev->error = 1; | |
107 ngx_connection_error(c, err, "WSASend() failed"); | |
108 return NGX_CHAIN_ERROR; | |
109 } | |
110 } | |
111 | |
112 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0, | |
113 "WSASend: fd:%d, s:%ul", c->fd, sent); | |
114 | |
473 | 115 if (send - prev_send == sent) { |
461 | 116 complete = 1; |
184
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117 } |
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118 |
461 | 119 c->sent += sent; |
120 | |
121 for (cl = in; cl && sent > 0; cl = cl->next) { | |
122 if (ngx_buf_special(cl->buf)) { | |
123 continue; | |
124 } | |
125 | |
126 if (sent == 0) { | |
127 break; | |
128 } | |
129 | |
130 size = cl->buf->last - cl->buf->pos; | |
131 | |
132 if (sent >= size) { | |
133 sent -= size; | |
134 cl->buf->pos = cl->buf->last; | |
184
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135 |
461 | 136 continue; |
137 } | |
138 | |
139 cl->buf->pos += sent; | |
140 | |
141 break; | |
142 } | |
143 | |
144 if (!complete) { | |
145 wev->ready = 0; | |
146 return cl; | |
147 } | |
148 | |
149 if (send >= limit || cl == NULL) { | |
150 return cl; | |
151 } | |
152 | |
153 in = cl; | |
184
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154 } |
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155 } |
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156 |
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157 |
501 | 158 ngx_chain_t * |
159 ngx_overlapped_wsasend_chain(ngx_connection_t *c, ngx_chain_t *in, off_t limit) | |
184
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160 { |
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161 int rc; |
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162 u_char *prev; |
473 | 163 u_long size, send, sent; |
184
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164 ngx_err_t err; |
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165 ngx_event_t *wev; |
461 | 166 ngx_array_t vec; |
184
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167 ngx_chain_t *cl; |
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168 LPWSAOVERLAPPED ovlp; |
501 | 169 LPWSABUF wsabuf; |
461 | 170 WSABUF wsabufs[NGX_WSABUFS]; |
184
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171 |
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172 wev = c->write; |
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173 |
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174 if (!wev->ready) { |
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175 return in; |
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176 } |
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177 |
461 | 178 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0, |
179 "wev->complete: %d", wev->complete); | |
180 | |
184
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181 if (!wev->complete) { |
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182 |
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183 /* post the overlapped WSASend() */ |
473 | 184 |
185 /* the maximum limit size is the maximum u_long value - the page size */ | |
186 | |
187 if (limit == 0 || limit > NGX_MAX_UINT32_VALUE - ngx_pagesize) { | |
188 limit = NGX_MAX_UINT32_VALUE - ngx_pagesize; | |
189 } | |
577 | 190 |
184
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191 /* |
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192 * WSABUFs must be 4-byte aligned otherwise |
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193 * WSASend() will return undocumented WSAEINVAL error. |
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194 */ |
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195 |
461 | 196 vec.elts = wsabufs; |
197 vec.nelts = 0; | |
198 vec.size = sizeof(WSABUF); | |
577 | 199 vec.nalloc = NGX_WSABUFS; |
461 | 200 vec.pool = c->pool; |
184
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201 |
461 | 202 send = 0; |
184
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203 prev = NULL; |
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204 wsabuf = NULL; |
577 | 205 |
184
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206 /* create the WSABUF and coalesce the neighbouring bufs */ |
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207 |
461 | 208 for (cl = in; |
209 cl && vec.nelts < ngx_max_wsabufs && send < limit; | |
210 cl = cl->next) | |
211 { | |
212 if (ngx_buf_special(cl->buf)) { | |
213 continue; | |
214 } | |
215 | |
216 size = cl->buf->last - cl->buf->pos; | |
217 | |
218 if (send + size > limit) { | |
219 size = (u_long) (limit - send); | |
220 } | |
184
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221 |
343
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222 if (prev == cl->buf->pos) { |
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223 wsabuf->len += cl->buf->last - cl->buf->pos; |
461 | 224 |
184
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225 } else { |
501 | 226 wsabuf = ngx_array_push(&vec); |
227 if (wsabuf == NULL) { | |
461 | 228 return NGX_CHAIN_ERROR; |
229 } | |
230 | |
343
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231 wsabuf->buf = (char *) cl->buf->pos; |
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232 wsabuf->len = cl->buf->last - cl->buf->pos; |
184
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233 } |
461 | 234 |
235 prev = cl->buf->last; | |
236 send += size; | |
184
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237 } |
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238 |
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239 ovlp = (LPWSAOVERLAPPED) &c->write->ovlp; |
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240 ngx_memzero(ovlp, sizeof(WSAOVERLAPPED)); |
577 | 241 |
461 | 242 rc = WSASend(c->fd, vec.elts, vec.nelts, &sent, 0, ovlp, NULL); |
184
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243 |
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244 wev->complete = 0; |
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245 |
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246 if (rc == -1) { |
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247 err = ngx_errno; |
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248 |
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249 if (err == WSA_IO_PENDING) { |
461 | 250 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, err, |
251 "WSASend() posted"); | |
184
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252 wev->active = 1; |
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253 return in; |
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254 |
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255 } else { |
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256 wev->error = 1; |
278
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257
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257 ngx_connection_error(c, err, "WSASend() failed"); |
184
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258 return NGX_CHAIN_ERROR; |
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259 } |
577 | 260 |
184
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261 } else if (ngx_event_flags & NGX_USE_IOCP_EVENT) { |
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262 |
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263 /* |
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264 * if a socket was bound with I/O completion port then |
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265 * GetQueuedCompletionStatus() would anyway return its status |
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266 * despite that WSASend() was already complete |
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267 */ |
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268 |
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269 wev->active = 1; |
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270 return in; |
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271 } |
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272 |
461 | 273 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0, |
274 "WSASend: fd:%d, s:%ul", c->fd, sent); | |
275 | |
184
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276 } else { |
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277 |
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278 /* the overlapped WSASend() complete */ |
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279 |
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280 wev->complete = 0; |
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281 wev->active = 0; |
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282 |
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283 if (ngx_event_flags & NGX_USE_IOCP_EVENT) { |
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parents:
144
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284 if (wev->ovlp.error) { |
278
0ba4821f4460
nginx-0.0.2-2004-03-04-10:04:55 import
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parents:
257
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285 ngx_connection_error(c, wev->ovlp.error, "WSASend() failed"); |
184
1bf718ce0dde
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286 return NGX_CHAIN_ERROR; |
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parents:
144
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287 } |
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144
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|
288 |
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289 sent = wev->available; |
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290 |
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291 } else { |
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292 if (WSAGetOverlappedResult(c->fd, (LPWSAOVERLAPPED) &wev->ovlp, |
1bf718ce0dde
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parents:
144
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293 &sent, 0, NULL) == 0) { |
278
0ba4821f4460
nginx-0.0.2-2004-03-04-10:04:55 import
Igor Sysoev <igor@sysoev.ru>
parents:
257
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|
294 ngx_connection_error(c, ngx_socket_errno, |
0ba4821f4460
nginx-0.0.2-2004-03-04-10:04:55 import
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parents:
257
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295 "WSASend() or WSAGetOverlappedResult() failed"); |
577 | 296 |
184
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297 return NGX_CHAIN_ERROR; |
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parents:
144
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298 } |
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parents:
144
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299 } |
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parents:
144
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|
300 } |
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parents:
144
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301 |
461 | 302 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0, |
303 "WSASend ovlp: fd:%d, s:%ul", c->fd, sent); | |
184
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144
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|
304 |
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305 c->sent += sent; |
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306 |
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307 for (cl = in; cl && sent > 0; cl = cl->next) { |
461 | 308 if (ngx_buf_special(cl->buf)) { |
309 continue; | |
310 } | |
311 | |
312 if (sent == 0) { | |
313 break; | |
314 } | |
184
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parents:
144
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|
315 |
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:
292
diff
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|
316 size = cl->buf->last - cl->buf->pos; |
184
1bf718ce0dde
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parents:
144
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|
317 |
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318 if (sent >= size) { |
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319 sent -= size; |
461 | 320 cl->buf->pos = cl->buf->last; |
184
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
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144
diff
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|
321 |
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
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parents:
144
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|
322 continue; |
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
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parents:
144
diff
changeset
|
323 } |
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
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144
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|
324 |
461 | 325 cl->buf->pos += sent; |
184
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
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parents:
144
diff
changeset
|
326 |
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
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parents:
144
diff
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|
327 break; |
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
changeset
|
328 } |
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
changeset
|
329 |
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
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parents:
144
diff
changeset
|
330 if (cl) { |
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
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parents:
144
diff
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|
331 wev->ready = 0; |
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
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parents:
144
diff
changeset
|
332 |
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
changeset
|
333 } else { |
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
changeset
|
334 wev->ready = 1; |
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
changeset
|
335 } |
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
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parents:
144
diff
changeset
|
336 |
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
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parents:
144
diff
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|
337 return cl; |
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
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parents:
144
diff
changeset
|
338 } |