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comparison src/os/win32/ngx_wsarecv.c @ 103:6dfda4cf5200

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nginx-0.0.1-2003-06-11-19:28:34 import
author Igor Sysoev <igor@sysoev.ru>
date Wed, 11 Jun 2003 15:28:34 +0000
parents
children ef8c87afcfc5
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102:7e86d028d8f0 103:6dfda4cf5200
1
2 #include <ngx_config.h>
3 #include <ngx_core.h>
4 #include <ngx_event.h>
5
6
7 ssize_t ngx_wsarecv(ngx_connection_t *c, char *buf, size_t size)
8 {
9 int rc;
10 u_int flags;
11 size_t bytes;
12 WSABUF wsabuf[1];
13 ngx_err_t err;
14 ngx_event_t *rev;
15 LPWSAOVERLAPPED ovlp;
16
17 rev = c->read;
18 bytes = 0;
19
20 if ((ngx_event_flags & NGX_HAVE_AIO_EVENT) && rev->ready) {
21 rev->ready = 0;
22
23 /* the overlapped WSARecv() completed */
24
25 if (ngx_event_flags & NGX_HAVE_IOCP_EVENT) {
26 if (rev->ovlp.error) {
27 ngx_log_error(NGX_LOG_ERR, c->log, rev->ovlp.error,
28 "WSARecv() failed");
29 return NGX_ERROR;
30 }
31
32 return rev->available;
33 }
34
35 if (WSAGetOverlappedResult(c->fd, (LPWSAOVERLAPPED) &rev->ovlp,
36 &bytes, 0, NULL) == 0) {
37 err = ngx_socket_errno;
38 ngx_log_error(NGX_LOG_CRIT, c->log, err,
39 "WSARecv() or WSAGetOverlappedResult() failed");
40
41 return NGX_ERROR;
42 }
43
44 return bytes;
45 }
46
47 if (ngx_event_flags & NGX_HAVE_AIO_EVENT) {
48 ovlp = (LPWSAOVERLAPPED) &c->read->ovlp;
49 ngx_memzero(ovlp, sizeof(WSAOVERLAPPED));
50
51 } else {
52 ovlp = NULL;
53 }
54
55 wsabuf[0].buf = buf;
56 wsabuf[0].len = size;
57 flags = 0;
58
59 rc = WSARecv(c->fd, wsabuf, 1, &bytes, &flags, ovlp, NULL);
60
61 ngx_log_debug(c->log, "WSARecv: %d:%d" _ rc _ bytes);
62
63 if (rc == -1) {
64 err = ngx_socket_errno;
65 if (err == WSA_IO_PENDING) {
66 return NGX_AGAIN;
67
68 } else if (err == WSAEWOULDBLOCK) {
69 ngx_log_error(NGX_LOG_INFO, c->log, err, "WSARecv() EAGAIN");
70 return NGX_AGAIN;
71
72 } else {
73 ngx_log_error(NGX_LOG_CRIT, c->log, err, "WSARecv() failed");
74 return NGX_ERROR;
75 }
76 }
77
78 if (ngx_event_flags & NGX_HAVE_IOCP_EVENT) {
79
80 /*
81 * If a socket was bound with I/O completion port
82 * then GetQueuedCompletionStatus() would anyway return its status
83 * despite that WSARecv() was already completed.
84 */
85
86 return NGX_AGAIN;
87 }
88
89 return bytes;
90 }