Mercurial > hg > nginx
annotate src/os/win32/ngx_wsarecv_chain.c @ 2788:a16ec9e1b4d1
ngx_http_image_filter_module
author | Igor Sysoev <igor@sysoev.ru> |
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date | Fri, 01 May 2009 18:42:09 +0000 |
parents | 4d9ea73a627a |
children | d620f497c50f |
rev | line source |
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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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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 |
577 | 12 #define NGX_WSABUFS 8 |
501 | 13 |
14 | |
15 ssize_t | |
16 ngx_wsarecv_chain(ngx_connection_t *c, ngx_chain_t *chain) | |
186
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17 { |
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18 int rc; |
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19 u_char *prev; |
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20 u_long bytes, flags; |
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21 size_t size; |
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22 ngx_err_t err; |
501 | 23 ngx_array_t vec; |
186
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24 ngx_event_t *rev; |
501 | 25 LPWSABUF wsabuf; |
26 WSABUF wsabufs[NGX_WSABUFS]; | |
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27 |
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28 prev = NULL; |
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29 wsabuf = NULL; |
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30 flags = 0; |
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31 size = 0; |
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32 bytes = 0; |
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33 |
501 | 34 vec.elts = wsabufs; |
35 vec.nelts = 0; | |
36 vec.size = sizeof(WSABUF); | |
577 | 37 vec.nalloc = NGX_WSABUFS; |
501 | 38 vec.pool = c->pool; |
186
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39 |
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40 /* coalesce the neighbouring bufs */ |
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41 |
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42 while (chain) { |
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43 if (prev == chain->buf->last) { |
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44 wsabuf->len += chain->buf->end - chain->buf->last; |
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45 |
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46 } else { |
501 | 47 wsabuf = ngx_array_push(&vec); |
48 if (wsabuf == NULL) { | |
49 return NGX_ERROR; | |
50 } | |
51 | |
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52 wsabuf->buf = (char *) chain->buf->last; |
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53 wsabuf->len = chain->buf->end - chain->buf->last; |
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54 } |
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55 |
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56 size += chain->buf->end - chain->buf->last; |
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57 prev = chain->buf->end; |
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58 chain = chain->next; |
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59 } |
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60 |
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61 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0, |
501 | 62 "WSARecv: %d:%d", vec.nelts, wsabuf->len); |
278
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63 |
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64 |
501 | 65 rc = WSARecv(c->fd, vec.elts, vec.nelts, &bytes, &flags, NULL, NULL); |
186
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66 |
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67 rev = c->read; |
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68 |
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69 if (rc == -1) { |
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70 rev->ready = 0; |
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71 err = ngx_socket_errno; |
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72 |
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73 if (err == WSAEWOULDBLOCK) { |
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74 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, err, |
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75 "WSARecv() not ready"); |
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76 return NGX_AGAIN; |
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77 } |
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78 |
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79 rev->error = 1; |
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80 ngx_connection_error(c, err, "WSARecv() failed"); |
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81 return NGX_ERROR; |
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82 } |
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83 |
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84 if (bytes < size) { |
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85 rev->ready = 0; |
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86 } |
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87 |
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88 if (bytes == 0) { |
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89 rev->eof = 1; |
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90 } |
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91 |
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92 return bytes; |
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93 } |