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0
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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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18
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12 #if (NGX_HAVE_KQUEUE)
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0
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13 #include <ngx_kqueue_module.h>
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14 #endif
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15
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16
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17 /*
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18 * the ready data requires 3 syscalls:
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19 * aio_write(), aio_error(), aio_return()
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20 * the non-ready data requires 4 (kqueue) or 5 syscalls:
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21 * aio_write(), aio_error(), notifiction, aio_error(), aio_return()
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22 * timeout, aio_cancel(), aio_error()
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23 */
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24
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126
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25 ssize_t
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26 ngx_aio_write(ngx_connection_t *c, u_char *buf, size_t size)
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0
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27 {
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28 int n;
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29 ngx_event_t *wev;
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30
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31 wev = c->write;
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32
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33 if (!wev->ready) {
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34 return NGX_AGAIN;
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35 }
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36
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37 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, wev->log, 0,
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38 "aio: wev->complete: %d", wev->complete);
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39
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40 if (!wev->complete) {
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41 ngx_memzero(&wev->aiocb, sizeof(struct aiocb));
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42
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43 wev->aiocb.aio_fildes = c->fd;
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44 wev->aiocb.aio_buf = buf;
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45 wev->aiocb.aio_nbytes = size;
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46
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18
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47 #if (NGX_HAVE_KQUEUE)
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0
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48 wev->aiocb.aio_sigevent.sigev_notify_kqueue = ngx_kqueue;
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49 wev->aiocb.aio_sigevent.sigev_notify = SIGEV_KEVENT;
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50 wev->aiocb.aio_sigevent.sigev_value.sigval_ptr = wev;
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51 #endif
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52
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53 if (aio_write(&wev->aiocb) == -1) {
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54 ngx_log_error(NGX_LOG_CRIT, wev->log, ngx_errno,
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55 "aio_write() failed");
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56 return NGX_ERROR;
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57 }
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58
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59 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, wev->log, 0, "aio_write: OK");
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60
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61 wev->active = 1;
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62 wev->ready = 0;
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63 }
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64
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65 wev->complete = 0;
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66
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67 n = aio_error(&wev->aiocb);
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68 if (n == -1) {
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69 ngx_log_error(NGX_LOG_CRIT, wev->log, ngx_errno, "aio_error() failed");
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70 wev->error = 1;
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71 return NGX_ERROR;
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72 }
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73
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74 if (n != 0) {
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75 if (n == NGX_EINPROGRESS) {
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76 if (wev->ready) {
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77 ngx_log_error(NGX_LOG_ALERT, wev->log, n,
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78 "aio_write() still in progress");
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79 wev->ready = 0;
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80 }
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81 return NGX_AGAIN;
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82 }
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83
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84 ngx_log_error(NGX_LOG_CRIT, wev->log, n, "aio_write() failed");
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85 wev->error = 1;
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86 wev->ready = 0;
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87
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88 #if 1
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89 n = aio_return(&wev->aiocb);
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90 if (n == -1) {
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91 ngx_log_error(NGX_LOG_ALERT, wev->log, ngx_errno,
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92 "aio_return() failed");
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93 }
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94
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95 ngx_log_error(NGX_LOG_CRIT, wev->log, n, "aio_return() %d", n);
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96 #endif
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97
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98 return NGX_ERROR;
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99 }
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100
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101 n = aio_return(&wev->aiocb);
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102 if (n == -1) {
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103 ngx_log_error(NGX_LOG_ALERT, wev->log, ngx_errno,
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104 "aio_return() failed");
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105
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106 wev->error = 1;
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107 wev->ready = 0;
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108 return NGX_ERROR;
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109 }
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110
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111
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112 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, wev->log, 0, "aio_write: %d", n);
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113
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114 wev->active = 0;
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115 wev->ready = 1;
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116
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117 return n;
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118 }
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