Mercurial > hg > nginx
annotate src/os/unix/ngx_aio_read.c @ 3892:12d8d2f30205
use MurmurHash2 for split_clients, because
its distribution is much better than CRC32's one
author | Igor Sysoev <igor@sysoev.ru> |
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date | Fri, 15 Apr 2011 10:59:57 +0000 |
parents | a1d54c705f38 |
children | d620f497c50f |
rev | line source |
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441
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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 |
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11 |
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12 extern int ngx_kqueue; |
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13 |
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14 |
577 | 15 ssize_t |
16 ngx_aio_read(ngx_connection_t *c, u_char *buf, size_t size) | |
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17 { |
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18 int n; |
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19 ngx_event_t *rev; |
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20 |
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21 rev = c->read; |
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22 |
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23 if (!rev->ready) { |
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24 ngx_log_error(NGX_LOG_ALERT, c->log, 0, "second aio post"); |
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25 return NGX_AGAIN; |
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26 } |
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27 |
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28 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0, |
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29 "rev->complete: %d", rev->complete); |
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30 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0, |
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31 "aio size: %d", size); |
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32 |
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33 if (!rev->complete) { |
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34 ngx_memzero(&rev->aiocb, sizeof(struct aiocb)); |
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35 |
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36 rev->aiocb.aio_fildes = c->fd; |
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37 rev->aiocb.aio_buf = buf; |
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38 rev->aiocb.aio_nbytes = size; |
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39 |
469 | 40 #if (NGX_HAVE_KQUEUE) |
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41 rev->aiocb.aio_sigevent.sigev_notify_kqueue = ngx_kqueue; |
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42 rev->aiocb.aio_sigevent.sigev_notify = SIGEV_KEVENT; |
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43 rev->aiocb.aio_sigevent.sigev_value.sigval_ptr = rev; |
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44 #endif |
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45 |
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46 if (aio_read(&rev->aiocb) == -1) { |
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47 ngx_log_error(NGX_LOG_CRIT, rev->log, ngx_errno, |
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48 "aio_read() failed"); |
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49 rev->error = 1; |
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50 return NGX_ERROR; |
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51 } |
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52 |
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53 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0, |
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54 "aio_read: #%d OK", c->fd); |
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55 |
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56 rev->active = 1; |
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57 rev->ready = 0; |
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58 } |
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59 |
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60 rev->complete = 0; |
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61 |
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62 n = aio_error(&rev->aiocb); |
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63 if (n == -1) { |
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64 ngx_log_error(NGX_LOG_ALERT, c->log, ngx_errno, "aio_error() failed"); |
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65 rev->error = 1; |
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66 return NGX_ERROR; |
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67 } |
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68 |
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69 if (n != 0) { |
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70 if (n == NGX_EINPROGRESS) { |
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71 if (rev->ready) { |
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72 ngx_log_error(NGX_LOG_ALERT, c->log, n, |
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73 "aio_read() still in progress"); |
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74 rev->ready = 0; |
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75 } |
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76 return NGX_AGAIN; |
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77 } |
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78 |
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79 ngx_log_error(NGX_LOG_CRIT, c->log, n, "aio_read() failed"); |
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80 rev->error = 1; |
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81 rev->ready = 0; |
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82 return NGX_ERROR; |
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83 } |
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84 |
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85 n = aio_return(&rev->aiocb); |
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86 if (n == -1) { |
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87 ngx_log_error(NGX_LOG_ALERT, c->log, ngx_errno, |
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88 "aio_return() failed"); |
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89 |
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90 rev->error = 1; |
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91 rev->ready = 0; |
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92 return NGX_ERROR; |
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93 } |
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94 |
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95 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, rev->log, 0, |
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96 "aio_read: #%d %d", c->fd, n); |
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97 |
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98 if (n == 0) { |
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99 rev->eof = 1; |
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100 rev->ready = 0; |
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101 } else { |
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102 rev->ready = 1; |
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103 } |
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104 |
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105 rev->active = 0; |
84036764e215
nginx-0.0.1-2003-10-29-11:30:44 import
Igor Sysoev <igor@sysoev.ru>
parents:
103
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106 |
84036764e215
nginx-0.0.1-2003-10-29-11:30:44 import
Igor Sysoev <igor@sysoev.ru>
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107 return n; |
93
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nginx-0.0.1-2003-05-21-17:28:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
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108 } |