Mercurial > hg > nginx
annotate src/os/unix/ngx_aio_write_chain.c @ 343:6bdf858bff8c
nginx-0.0.3-2004-05-28-19:49:23 import; rename ngx_hunk_t to ngx_buf_t
author | Igor Sysoev <igor@sysoev.ru> |
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date | Fri, 28 May 2004 15:49:23 +0000 |
parents | 4a3f18406832 |
children | 7650aea1816f |
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1 |
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2 #include <ngx_config.h> |
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3 #include <ngx_core.h> |
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4 #include <ngx_event.h> |
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5 #include <ngx_aio.h> |
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6 |
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7 |
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8 ngx_chain_t *ngx_aio_write_chain(ngx_connection_t *c, ngx_chain_t *in) |
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9 { |
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10 int n; |
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11 u_char *buf, *prev; |
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12 off_t sent; |
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13 size_t size; |
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14 ngx_err_t err; |
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15 ngx_chain_t *cl; |
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16 |
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17 sent = 0; |
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18 cl = in; |
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19 |
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20 while (cl) { |
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21 |
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22 if (cl->buf->last - cl->buf->pos == 0) { |
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23 cl = cl->next; |
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24 continue; |
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25 } |
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26 |
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27 /* we can post the single aio operation only */ |
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28 |
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29 if (!c->write->ready) { |
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30 return cl; |
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31 } |
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32 |
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33 buf = cl->buf->pos; |
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34 prev = buf; |
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35 size = 0; |
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36 |
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37 /* coalesce the neighbouring bufs */ |
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38 |
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39 while (cl && prev == cl->buf->pos) { |
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40 size += cl->buf->last - cl->buf->pos; |
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41 prev = cl->buf->last; |
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42 cl = cl->next; |
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43 } |
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44 |
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45 n = ngx_aio_write(c, buf, size); |
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47 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0, "aio_write: %d", n); |
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48 |
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49 if (n == NGX_ERROR) { |
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50 return NGX_CHAIN_ERROR; |
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51 } |
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53 if (n > 0) { |
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54 sent += n; |
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55 c->sent += n; |
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56 } |
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58 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0, |
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59 "aio_write sent: " OFF_T_FMT, c->sent); |
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60 |
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61 for (cl = in; cl; cl = cl->next) { |
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62 |
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63 if (sent >= cl->buf->last - cl->buf->pos) { |
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64 sent -= cl->buf->last - cl->buf->pos; |
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65 cl->buf->pos = cl->buf->last; |
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66 |
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67 continue; |
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68 } |
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70 cl->buf->pos += sent; |
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72 break; |
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73 } |
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74 } |
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75 |
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76 return cl; |
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77 } |