Mercurial > hg > nginx

comparison src/os/unix/ngx_aio_write.c @ 93:738fe44c70d5

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
nginx-0.0.1-2003-05-21-17:28:21 import
author Igor Sysoev <igor@sysoev.ru>
date Wed, 21 May 2003 13:28:21 +0000
parents
children 6dfda4cf5200
comparison
equal deleted inserted replaced
92:19cc647ecd91 93:738fe44c70d5
1
2 #include <ngx_config.h>
3 #include <ngx_core.h>
4 #include <ngx_aio.h>
5
6 #if (HAVE_KQUEUE)
7 #include <ngx_kqueue_module.h>
8 #endif
9
10
11 /*
12 The data is ready - 3 syscalls:
13 aio_write(), aio_error(), aio_return()
14 The data is not ready - 4 (kqueue) or 5 syscalls:
15 aio_write(), aio_error(), notifiction,
16 aio_error(), aio_return()
17 aio_cancel(), aio_error()
18 */
19
20 ssize_t ngx_aio_write(ngx_connection_t *c, char *buf, size_t size)
21 {
22 int rc, first, canceled;
23 ngx_event_t *ev;
24
25 ev = c->write;
26
27 canceled = 0;
28
29 ngx_log_debug(ev->log, "aio: ev->ready: %d" _ ev->ready);
30 ngx_log_debug(ev->log, "aio: aiocb: %08x" _ &ev->aiocb);
31
32 if (ev->timedout) {
33 ngx_set_socket_errno(NGX_ETIMEDOUT);
34 ngx_log_error(NGX_LOG_ERR, ev->log, 0, "aio_write() timed out");
35
36 rc = aio_cancel(c->fd, &ev->aiocb);
37 if (rc == -1) {
38 ngx_log_error(NGX_LOG_CRIT, ev->log, ngx_errno,
39 "aio_cancel() failed");
40 return NGX_ERROR;
41 }
42
43 ngx_log_debug(ev->log, "aio_cancel: %d" _ rc);
44
45 canceled = 1;
46
47 ev->ready = 1;
48 }
49
50 first = 0;
51
52 if (!ev->ready) {
53 ngx_memzero(&ev->aiocb, sizeof(struct aiocb));
54
55 ev->aiocb.aio_fildes = c->fd;
56 ev->aiocb.aio_buf = buf;
57 ev->aiocb.aio_nbytes = size;
58
59 #if (HAVE_KQUEUE)
60 ev->aiocb.aio_sigevent.sigev_notify_kqueue = ngx_kqueue;
61 ev->aiocb.aio_sigevent.sigev_notify = SIGEV_KEVENT;
62 ev->aiocb.aio_sigevent.sigev_value.sigval_ptr = ev;
63 #endif
64
65 if (aio_write(&ev->aiocb) == -1) {
66 ngx_log_error(NGX_LOG_CRIT, ev->log, ngx_errno,
67 "aio_write() failed");
68 return NGX_ERROR;
69 }
70
71 ngx_log_debug(ev->log, "aio_write: OK");
72
73 ev->active = 1;
74 first = 1;
75 }
76
77 ev->ready = 0;
78
79 rc = aio_error(&ev->aiocb);
80 if (rc == -1) {
81 ngx_log_error(NGX_LOG_CRIT, ev->log, ngx_errno, "aio_error() failed");
82 return NGX_ERROR;
83 }
84
85 if (rc != 0) {
86 if (rc == NGX_EINPROGRESS) {
87 if (!first) {
88 ngx_log_error(NGX_LOG_CRIT, ev->log, rc,
89 "aio_write() still in progress");
90 }
91 return NGX_AGAIN;
92 }
93
94 if (rc == NGX_ECANCELED && canceled) {
95 return NGX_ERROR;
96 }
97
98 ngx_log_error(NGX_LOG_CRIT, ev->log, rc, "aio_write() failed");
99 return NGX_ERROR;
100 }
101
102 rc = aio_return(&ev->aiocb);
103 if (rc == -1) {
104 ngx_log_error(NGX_LOG_CRIT, ev->log, ngx_errno, "aio_return() failed");
105
106 return NGX_ERROR;
107 }
108
109 ngx_log_debug(ev->log, "aio_write: %d" _ rc);
110
111 return rc;
112 }