Mercurial > hg > nginx
comparison src/event/ngx_event_aio_read.c @ 59:e8cdc2989cee
nginx-0.0.1-2003-02-06-20:21:13 import
author | Igor Sysoev <igor@sysoev.ru> |
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date | Thu, 06 Feb 2003 17:21:13 +0000 |
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58:6b13b1cadabe | 59:e8cdc2989cee |
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1 | |
2 #include <ngx_config.h> | |
3 #include <ngx_core.h> | |
4 #include <ngx_errno.h> | |
5 #include <ngx_log.h> | |
6 #include <ngx_recv.h> | |
7 #include <ngx_connection.h> | |
8 #include <ngx_event.h> | |
9 | |
10 #if (HAVE_KQUEUE) | |
11 #include <ngx_kqueue_module.h> | |
12 #endif | |
13 | |
14 | |
15 /* | |
16 The data is ready - 3 syscalls: | |
17 aio_read(), aio_error(), aio_return() | |
18 The data is not ready - 4 (kqueue) or 5 syscalls: | |
19 aio_read(), aio_error(), notifiction, | |
20 aio_error(), aio_return() | |
21 aio_cancel(), aio_error() | |
22 */ | |
23 | |
24 ssize_t ngx_event_aio_read(ngx_connection_t *c, char *buf, size_t size) | |
25 { | |
26 int rc, first, canceled; | |
27 ngx_event_t *ev; | |
28 | |
29 ev = c->read; | |
30 | |
31 canceled = 0; | |
32 | |
33 if (ev->timedout) { | |
34 ngx_set_socket_errno(NGX_ETIMEDOUT); | |
35 ngx_log_error(NGX_LOG_ERR, ev->log, 0, "aio_read() timed out"); | |
36 | |
37 rc = aio_cancel(c->fd, &ev->aiocb); | |
38 if (rc == -1) { | |
39 ngx_log_error(NGX_LOG_CRIT, ev->log, ngx_errno, | |
40 "aio_cancel() failed"); | |
41 return NGX_ERROR; | |
42 } | |
43 | |
44 ngx_log_debug(ev->log, "aio_cancel: %d" _ rc); | |
45 | |
46 canceled = 1; | |
47 | |
48 ev->ready = 1; | |
49 } | |
50 | |
51 first = 0; | |
52 | |
53 if (!ev->ready) { | |
54 ngx_memzero(&ev->aiocb, sizeof(struct aiocb)); | |
55 | |
56 ev->aiocb.aio_fildes = c->fd; | |
57 ev->aiocb.aio_buf = buf; | |
58 ev->aiocb.aio_nbytes = size; | |
59 | |
60 #if (HAVE_KQUEUE) | |
61 ev->aiocb.aio_sigevent.sigev_notify_kqueue = kq; | |
62 ev->aiocb.aio_sigevent.sigev_notify = SIGEV_KEVENT; | |
63 ev->aiocb.aio_sigevent.sigev_value.sigval_ptr = ev; | |
64 #endif | |
65 | |
66 if (aio_read(&ev->aiocb) == -1) { | |
67 ngx_log_error(NGX_LOG_CRIT, ev->log, ngx_errno, | |
68 "aio_read() failed"); | |
69 return NGX_ERROR; | |
70 } | |
71 | |
72 ngx_log_debug(ev->log, "aio_read: OK"); | |
73 | |
74 ev->active = 1; | |
75 first = 1; | |
76 } | |
77 | |
78 ev->ready = 0; | |
79 | |
80 rc = aio_error(&ev->aiocb); | |
81 if (rc == -1) { | |
82 ngx_log_error(NGX_LOG_CRIT, ev->log, ngx_errno, "aio_error() failed"); | |
83 return NGX_ERROR; | |
84 } | |
85 | |
86 if (rc != 0) { | |
87 if (rc == NGX_EINPROGRESS) { | |
88 if (!first) { | |
89 ngx_log_error(NGX_LOG_CRIT, ev->log, rc, | |
90 "aio_read() still in progress"); | |
91 } | |
92 return NGX_AGAIN; | |
93 } | |
94 | |
95 if (rc == NGX_ECANCELED && canceled) { | |
96 return NGX_ERROR; | |
97 } | |
98 | |
99 ngx_log_error(NGX_LOG_CRIT, ev->log, rc, "aio_read() failed"); | |
100 return NGX_ERROR; | |
101 } | |
102 | |
103 rc = aio_return(&ev->aiocb); | |
104 if (rc == -1) { | |
105 ngx_log_error(NGX_LOG_CRIT, ev->log, ngx_errno, "aio_return() failed"); | |
106 | |
107 return NGX_ERROR; | |
108 } | |
109 | |
110 ngx_log_debug(ev->log, "aio_read: %d" _ rc); | |
111 | |
112 return rc; | |
113 } |