Mercurial > hg > nginx-quic
annotate src/os/unix/ngx_aio_read.c @ 324:0ab66f4b6c4d
nginx-0.0.3-2004-04-22-00:13:48 import
author | Igor Sysoev <igor@sysoev.ru> |
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date | Wed, 21 Apr 2004 20:13:48 +0000 |
parents | 4a3f18406832 |
children | da8c5707af39 |
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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_read(ngx_connection_t *c, u_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 *rev; |
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24 |
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25 rev = c->read; |
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26 |
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27 if (!rev->ready) { |
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28 ngx_log_error(NGX_LOG_ALERT, c->log, 0, "second aio post"); |
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29 return NGX_AGAIN; |
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30 } |
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31 |
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32 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0, |
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33 "rev->complete: %d", rev->complete); |
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34 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0, |
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35 "aio size: %d", size); |
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36 |
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37 if (!rev->complete) { |
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38 ngx_memzero(&rev->aiocb, sizeof(struct aiocb)); |
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39 |
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40 rev->aiocb.aio_fildes = c->fd; |
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41 rev->aiocb.aio_buf = buf; |
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42 rev->aiocb.aio_nbytes = size; |
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43 |
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44 #if (HAVE_KQUEUE) |
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45 rev->aiocb.aio_sigevent.sigev_notify_kqueue = ngx_kqueue; |
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46 rev->aiocb.aio_sigevent.sigev_notify = SIGEV_KEVENT; |
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47 rev->aiocb.aio_sigevent.sigev_value.sigval_ptr = rev; |
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48 #endif |
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49 |
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50 if (aio_read(&rev->aiocb) == -1) { |
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51 ngx_log_error(NGX_LOG_CRIT, rev->log, ngx_errno, |
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52 "aio_read() failed"); |
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53 rev->error = 1; |
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54 return NGX_ERROR; |
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55 } |
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56 |
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57 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0, |
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58 "aio_read: #%d OK", c->fd); |
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59 |
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60 rev->active = 1; |
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61 rev->ready = 0; |
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62 } |
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63 |
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64 rev->complete = 0; |
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65 |
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66 n = aio_error(&rev->aiocb); |
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67 if (n == -1) { |
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68 ngx_log_error(NGX_LOG_ALERT, c->log, ngx_errno, "aio_error() failed"); |
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69 rev->error = 1; |
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70 return NGX_ERROR; |
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71 } |
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72 |
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73 if (n != 0) { |
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74 if (n == NGX_EINPROGRESS) { |
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75 if (rev->ready) { |
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76 ngx_log_error(NGX_LOG_ALERT, c->log, n, |
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77 "aio_read() still in progress"); |
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78 rev->ready = 0; |
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79 } |
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80 return NGX_AGAIN; |
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81 } |
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82 |
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83 ngx_log_error(NGX_LOG_CRIT, c->log, n, "aio_read() failed"); |
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84 rev->error = 1; |
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85 rev->ready = 0; |
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86 return NGX_ERROR; |
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87 } |
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88 |
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89 n = aio_return(&rev->aiocb); |
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90 if (n == -1) { |
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91 ngx_log_error(NGX_LOG_ALERT, c->log, ngx_errno, |
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92 "aio_return() failed"); |
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93 |
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94 rev->error = 1; |
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95 rev->ready = 0; |
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96 return NGX_ERROR; |
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97 } |
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98 |
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99 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, rev->log, 0, |
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100 "aio_read: #%d %d", c->fd, n); |
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101 |
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102 if (n == 0) { |
389d7ee9fa60
nginx-0.0.1-2003-10-30-11:51:06 import
Igor Sysoev <igor@sysoev.ru>
parents:
164
diff
changeset
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103 rev->eof = 1; |
389d7ee9fa60
nginx-0.0.1-2003-10-30-11:51:06 import
Igor Sysoev <igor@sysoev.ru>
parents:
164
diff
changeset
|
104 rev->ready = 0; |
389d7ee9fa60
nginx-0.0.1-2003-10-30-11:51:06 import
Igor Sysoev <igor@sysoev.ru>
parents:
164
diff
changeset
|
105 } else { |
389d7ee9fa60
nginx-0.0.1-2003-10-30-11:51:06 import
Igor Sysoev <igor@sysoev.ru>
parents:
164
diff
changeset
|
106 rev->ready = 1; |
389d7ee9fa60
nginx-0.0.1-2003-10-30-11:51:06 import
Igor Sysoev <igor@sysoev.ru>
parents:
164
diff
changeset
|
107 } |
389d7ee9fa60
nginx-0.0.1-2003-10-30-11:51:06 import
Igor Sysoev <igor@sysoev.ru>
parents:
164
diff
changeset
|
108 |
164
84036764e215
nginx-0.0.1-2003-10-29-11:30:44 import
Igor Sysoev <igor@sysoev.ru>
parents:
103
diff
changeset
|
109 rev->active = 0; |
84036764e215
nginx-0.0.1-2003-10-29-11:30:44 import
Igor Sysoev <igor@sysoev.ru>
parents:
103
diff
changeset
|
110 |
84036764e215
nginx-0.0.1-2003-10-29-11:30:44 import
Igor Sysoev <igor@sysoev.ru>
parents:
103
diff
changeset
|
111 return n; |
93
738fe44c70d5
nginx-0.0.1-2003-05-21-17:28:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
112 } |