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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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25 ssize_t ngx_aio_write(ngx_connection_t *c, u_char *buf, size_t size)
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26 {
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27 int n;
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28 ngx_event_t *wev;
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29
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30 wev = c->write;
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31
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32 if (!wev->ready) {
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33 return NGX_AGAIN;
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34 }
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35
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36 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, wev->log, 0,
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37 "aio: wev->complete: %d", wev->complete);
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38
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39 if (!wev->complete) {
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40 ngx_memzero(&wev->aiocb, sizeof(struct aiocb));
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41
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42 wev->aiocb.aio_fildes = c->fd;
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43 wev->aiocb.aio_buf = buf;
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44 wev->aiocb.aio_nbytes = size;
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45
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18
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46 #if (NGX_HAVE_KQUEUE)
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0
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47 wev->aiocb.aio_sigevent.sigev_notify_kqueue = ngx_kqueue;
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48 wev->aiocb.aio_sigevent.sigev_notify = SIGEV_KEVENT;
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49 wev->aiocb.aio_sigevent.sigev_value.sigval_ptr = wev;
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50 #endif
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51
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52 if (aio_write(&wev->aiocb) == -1) {
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53 ngx_log_error(NGX_LOG_CRIT, wev->log, ngx_errno,
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54 "aio_write() failed");
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55 return NGX_ERROR;
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56 }
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57
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58 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, wev->log, 0, "aio_write: OK");
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59
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60 wev->active = 1;
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61 wev->ready = 0;
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62 }
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63
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64 wev->complete = 0;
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65
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66 n = aio_error(&wev->aiocb);
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67 if (n == -1) {
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68 ngx_log_error(NGX_LOG_CRIT, wev->log, ngx_errno, "aio_error() failed");
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69 wev->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 (wev->ready) {
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76 ngx_log_error(NGX_LOG_ALERT, wev->log, n,
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77 "aio_write() still in progress");
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78 wev->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, wev->log, n, "aio_write() failed");
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84 wev->error = 1;
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85 wev->ready = 0;
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86
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87 #if 1
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88 n = aio_return(&wev->aiocb);
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89 if (n == -1) {
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90 ngx_log_error(NGX_LOG_ALERT, wev->log, ngx_errno,
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91 "aio_return() failed");
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92 }
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93
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94 ngx_log_error(NGX_LOG_CRIT, wev->log, n, "aio_return() %d", n);
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95 #endif
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96
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97 return NGX_ERROR;
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98 }
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99
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100 n = aio_return(&wev->aiocb);
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101 if (n == -1) {
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102 ngx_log_error(NGX_LOG_ALERT, wev->log, ngx_errno,
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103 "aio_return() failed");
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104
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105 wev->error = 1;
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106 wev->ready = 0;
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107 return NGX_ERROR;
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108 }
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109
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110
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111 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, wev->log, 0, "aio_write: %d", n);
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112
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113 wev->active = 0;
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114 wev->ready = 1;
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115
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116 return n;
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117 }
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