Mercurial > hg > nginx
annotate src/os/unix/ngx_aio_write_chain.c @ 477:ad1e9ebf93bb release-0.1.13
nginx-0.1.13-RELEASE import
*) Feature: the server_names_hash and server_names_hash_threshold
directives.
*) Bugfix: the *.domain.tld names in the "server_name" directive did
not work.
*) Bugfix: the %request_length log parameter logged the incorrect
length.
author | Igor Sysoev <igor@sysoev.ru> |
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date | Tue, 21 Dec 2004 12:30:30 +0000 |
parents | 8e8f3af115b5 |
children | d4ea69372b94 |
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 |
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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 #include <ngx_aio.h> |
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11 |
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12 |
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13 ngx_chain_t *ngx_aio_write_chain(ngx_connection_t *c, ngx_chain_t *in, |
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14 off_t limit) |
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15 { |
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16 u_char *buf, *prev; |
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17 off_t send, sent; |
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18 size_t len; |
461 | 19 ssize_t n, size; |
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20 ngx_err_t err; |
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21 ngx_chain_t *cl; |
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22 |
473 | 23 /* the maximum limit size is the maximum size_t value - the page size */ |
24 | |
477 | 25 if (limit == 0 || limit > NGX_MAX_SIZE_T_VALUE - ngx_pagesize) { |
26 limit = NGX_MAX_SIZE_T_VALUE - ngx_pagesize; | |
473 | 27 } |
28 | |
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29 send = 0; |
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30 sent = 0; |
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31 cl = in; |
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32 |
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33 while (cl) { |
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34 |
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35 if (cl->buf->pos == cl->buf->last) { |
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36 cl = cl->next; |
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37 continue; |
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38 } |
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39 |
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40 /* we can post the single aio operation only */ |
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41 |
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42 if (!c->write->ready) { |
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43 return cl; |
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44 } |
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45 |
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46 buf = cl->buf->pos; |
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47 prev = buf; |
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48 len = 0; |
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49 |
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50 /* coalesce the neighbouring bufs */ |
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51 |
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52 while (cl && prev == cl->buf->pos && send < limit) { |
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53 if (ngx_buf_special(cl->buf)) { |
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54 continue; |
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55 } |
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56 |
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57 size = cl->buf->last - cl->buf->pos; |
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58 |
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59 if (send + size > limit) { |
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60 size = limit - send; |
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61 } |
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62 |
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63 len += size; |
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64 prev = cl->buf->pos + size; |
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65 send += size; |
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66 cl = cl->next; |
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67 } |
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68 |
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69 n = ngx_aio_write(c, buf, len); |
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70 |
461 | 71 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0, "aio_write: %z", n); |
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72 |
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73 if (n == NGX_ERROR) { |
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74 return NGX_CHAIN_ERROR; |
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75 } |
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76 |
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77 if (n > 0) { |
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78 sent += n; |
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79 c->sent += n; |
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80 } |
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81 |
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82 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0, |
461 | 83 "aio_write sent: %O", c->sent); |
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84 |
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85 for (cl = in; cl; cl = cl->next) { |
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86 |
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87 if (sent >= cl->buf->last - cl->buf->pos) { |
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88 sent -= cl->buf->last - cl->buf->pos; |
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89 cl->buf->pos = cl->buf->last; |
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90 |
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91 continue; |
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92 } |
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93 |
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94 cl->buf->pos += sent; |
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95 |
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96 break; |
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97 } |
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98 } |
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99 |
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100 return cl; |
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101 } |