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comparison src/os/unix/ngx_aio_write.c @ 0:f0b350454894 NGINX_0_1_0

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nginx 0.1.0 *) The first public version.
author Igor Sysoev <http://sysoev.ru>
date Mon, 04 Oct 2004 00:00:00 +0400
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children 6f8b0dc0f8dd
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-1:000000000000 0:f0b350454894
1
2 /*
3 * Copyright (C) Igor Sysoev
4 */
5
6
7 #include <ngx_config.h>
8 #include <ngx_core.h>
9 #include <ngx_event.h>
10 #include <ngx_aio.h>
11
12 #if (HAVE_KQUEUE)
13 #include <ngx_kqueue_module.h>
14 #endif
15
16
17 /*
18 * the ready data requires 3 syscalls:
19 * aio_write(), aio_error(), aio_return()
20 * the non-ready data requires 4 (kqueue) or 5 syscalls:
21 * aio_write(), aio_error(), notifiction, aio_error(), aio_return()
22 * timeout, aio_cancel(), aio_error()
23 */
24
25 ssize_t ngx_aio_write(ngx_connection_t *c, u_char *buf, size_t size)
26 {
27 int n;
28 ngx_event_t *wev;
29
30 wev = c->write;
31
32 if (!wev->ready) {
33 return NGX_AGAIN;
34 }
35
36 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, wev->log, 0,
37 "aio: wev->complete: %d", wev->complete);
38
39 if (!wev->complete) {
40 ngx_memzero(&wev->aiocb, sizeof(struct aiocb));
41
42 wev->aiocb.aio_fildes = c->fd;
43 wev->aiocb.aio_buf = buf;
44 wev->aiocb.aio_nbytes = size;
45
46 #if (HAVE_KQUEUE)
47 wev->aiocb.aio_sigevent.sigev_notify_kqueue = ngx_kqueue;
48 wev->aiocb.aio_sigevent.sigev_notify = SIGEV_KEVENT;
49 wev->aiocb.aio_sigevent.sigev_value.sigval_ptr = wev;
50 #endif
51
52 if (aio_write(&wev->aiocb) == -1) {
53 ngx_log_error(NGX_LOG_CRIT, wev->log, ngx_errno,
54 "aio_write() failed");
55 return NGX_ERROR;
56 }
57
58 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, wev->log, 0, "aio_write: OK");
59
60 wev->active = 1;
61 wev->ready = 0;
62 }
63
64 wev->complete = 0;
65
66 n = aio_error(&wev->aiocb);
67 if (n == -1) {
68 ngx_log_error(NGX_LOG_CRIT, wev->log, ngx_errno, "aio_error() failed");
69 wev->error = 1;
70 return NGX_ERROR;
71 }
72
73 if (n != 0) {
74 if (n == NGX_EINPROGRESS) {
75 if (wev->ready) {
76 ngx_log_error(NGX_LOG_ALERT, wev->log, n,
77 "aio_write() still in progress");
78 wev->ready = 0;
79 }
80 return NGX_AGAIN;
81 }
82
83 ngx_log_error(NGX_LOG_CRIT, wev->log, n, "aio_write() failed");
84 wev->error = 1;
85 wev->ready = 0;
86
87 #if 1
88 n = aio_return(&wev->aiocb);
89 if (n == -1) {
90 ngx_log_error(NGX_LOG_ALERT, wev->log, ngx_errno,
91 "aio_return() failed");
92 }
93
94 ngx_log_error(NGX_LOG_CRIT, wev->log, n, "aio_return() %d", n);
95 #endif
96
97 return NGX_ERROR;
98 }
99
100 n = aio_return(&wev->aiocb);
101 if (n == -1) {
102 ngx_log_error(NGX_LOG_ALERT, wev->log, ngx_errno,
103 "aio_return() failed");
104
105 wev->error = 1;
106 wev->ready = 0;
107 return NGX_ERROR;
108 }
109
110
111 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, wev->log, 0, "aio_write: %d", n);
112
113 wev->active = 0;
114 wev->ready = 1;
115
116 return n;
117 }