Mercurial > hg > nginx
annotate src/os/unix/ngx_aio_write.c @ 164:84036764e215
nginx-0.0.1-2003-10-29-11:30:44 import
author | Igor Sysoev <igor@sysoev.ru> |
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date | Wed, 29 Oct 2003 08:30:44 +0000 |
parents | ef8c87afcfc5 |
children | 389d7ee9fa60 |
rev | line source |
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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 #if (HAVE_KQUEUE) |
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8 #include <ngx_kqueue_module.h> |
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9 #endif |
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10 |
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11 |
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12 /* |
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13 * the ready data requires 3 syscalls: |
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14 * aio_write(), aio_error(), aio_return() |
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15 * the non-ready data requires 4 (kqueue) or 5 syscalls: |
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16 * aio_write(), aio_error(), notifiction, aio_error(), aio_return() |
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17 * timeout, aio_cancel(), aio_error() |
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18 */ |
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19 |
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20 ssize_t ngx_aio_write(ngx_connection_t *c, char *buf, size_t size) |
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21 { |
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22 int n; |
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23 ngx_event_t *wev; |
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24 |
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25 wev = c->write; |
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27 if (wev->active) { |
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28 return NGX_AGAIN; |
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29 } |
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31 ngx_log_debug(wev->log, "aio: wev->aio_complete: %d" _ wev->aio_complete); |
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33 if (!wev->aio_complete) { |
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34 ngx_memzero(&wev->aiocb, sizeof(struct aiocb)); |
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35 |
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36 wev->aiocb.aio_fildes = c->fd; |
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37 wev->aiocb.aio_buf = buf; |
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38 wev->aiocb.aio_nbytes = size; |
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39 |
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40 #if (HAVE_KQUEUE) |
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41 wev->aiocb.aio_sigevent.sigev_notify_kqueue = ngx_kqueue; |
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42 wev->aiocb.aio_sigevent.sigev_notify = SIGEV_KEVENT; |
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43 wev->aiocb.aio_sigevent.sigev_value.sigval_ptr = wev; |
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44 #endif |
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45 |
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46 if (aio_write(&wev->aiocb) == -1) { |
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47 ngx_log_error(NGX_LOG_CRIT, wev->log, ngx_errno, |
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48 "aio_write() failed"); |
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49 return NGX_ERROR; |
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50 } |
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51 |
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52 ngx_log_debug(wev->log, "aio_write: OK"); |
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53 |
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54 wev->active = 1; |
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55 } |
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56 |
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57 wev->aio_complete = 0; |
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58 |
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59 n = aio_error(&wev->aiocb); |
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60 if (n == -1) { |
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61 ngx_log_error(NGX_LOG_CRIT, wev->log, ngx_errno, "aio_error() failed"); |
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62 wev->error = 1; |
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63 return NGX_ERROR; |
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64 } |
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65 |
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66 if (n != 0) { |
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67 if (n == NGX_EINPROGRESS) { |
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68 if (!wev->active) { |
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69 ngx_log_error(NGX_LOG_ALERT, wev->log, n, |
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70 "aio_write() still in progress"); |
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71 } |
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72 return NGX_AGAIN; |
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73 } |
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74 |
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75 ngx_log_error(NGX_LOG_CRIT, wev->log, n, "aio_write() failed"); |
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76 wev->error = 1; |
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77 return NGX_ERROR; |
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78 } |
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79 |
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80 n = aio_return(&wev->aiocb); |
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81 if (n == -1) { |
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82 ngx_log_error(NGX_LOG_ALERT, wev->log, ngx_errno, |
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83 "aio_return() failed"); |
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84 |
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85 wev->error = 1; |
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86 return NGX_ERROR; |
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87 } |
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88 |
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89 wev->active = 0; |
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90 |
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91 ngx_log_debug(wev->log, "aio_write: %d" _ n); |
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92 |
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93 if (n == 0) { |
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94 wev->eof = 1; |
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95 } |
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96 |
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97 return n; |
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98 } |