Mercurial > hg > nginx
annotate src/os/unix/ngx_aio_write_chain.c @ 2779:7bb23b7d9f73
delete useless debug log
author | Igor Sysoev <igor@sysoev.ru> |
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date | Wed, 29 Apr 2009 15:15:17 +0000 |
parents | f69d1aab6a0f |
children | a1d54c705f38 |
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 #include <ngx_aio.h> |
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11 |
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12 |
577 | 13 ngx_chain_t * |
14 ngx_aio_write_chain(ngx_connection_t *c, ngx_chain_t *in, 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_chain_t *cl; |
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21 |
473 | 22 /* the maximum limit size is the maximum size_t value - the page size */ |
23 | |
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24 if (limit == 0 || limit > (off_t) (NGX_MAX_SIZE_T_VALUE - ngx_pagesize)) { |
477 | 25 limit = NGX_MAX_SIZE_T_VALUE - ngx_pagesize; |
473 | 26 } |
27 | |
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28 send = 0; |
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29 sent = 0; |
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30 cl = in; |
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31 |
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32 while (cl) { |
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33 |
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34 if (cl->buf->pos == cl->buf->last) { |
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35 cl = cl->next; |
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36 continue; |
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37 } |
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38 |
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39 /* we can post the single aio operation only */ |
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40 |
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41 if (!c->write->ready) { |
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42 return cl; |
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43 } |
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44 |
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45 buf = cl->buf->pos; |
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46 prev = buf; |
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47 len = 0; |
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48 |
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49 /* coalesce the neighbouring bufs */ |
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50 |
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51 while (cl && prev == cl->buf->pos && send < limit) { |
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52 if (ngx_buf_special(cl->buf)) { |
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53 continue; |
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54 } |
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55 |
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56 size = cl->buf->last - cl->buf->pos; |
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57 |
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58 if (send + size > limit) { |
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59 size = limit - send; |
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60 } |
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61 |
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62 len += size; |
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63 prev = cl->buf->pos + size; |
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64 send += size; |
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65 cl = cl->next; |
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66 } |
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67 |
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68 n = ngx_aio_write(c, buf, len); |
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69 |
461 | 70 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0, "aio_write: %z", n); |
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71 |
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72 if (n == NGX_ERROR) { |
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73 return NGX_CHAIN_ERROR; |
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74 } |
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75 |
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76 if (n > 0) { |
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77 sent += n; |
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78 c->sent += n; |
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79 } |
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81 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0, |
461 | 82 "aio_write sent: %O", c->sent); |
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83 |
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84 for (cl = in; cl; cl = cl->next) { |
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85 |
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86 if (sent >= cl->buf->last - cl->buf->pos) { |
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87 sent -= cl->buf->last - cl->buf->pos; |
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88 cl->buf->pos = cl->buf->last; |
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89 |
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90 continue; |
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91 } |
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92 |
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93 cl->buf->pos += sent; |
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94 |
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95 break; |
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96 } |
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97 } |
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98 |
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99 return cl; |
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100 } |