Mercurial > hg > nginx-vendor-0-5
comparison src/os/unix/ngx_aio_write.c @ 0:f0b350454894 NGINX_0_1_0
nginx 0.1.0
*) The first public version.
author | Igor Sysoev <http://sysoev.ru> |
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date | Mon, 04 Oct 2004 00:00:00 +0400 |
parents | |
children | 6f8b0dc0f8dd |
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-1:000000000000 | 0:f0b350454894 |
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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 } |