Mercurial > hg > nginx
annotate src/os/win32/ngx_wsasend.c @ 7670:ccb5ff87ab3e
Cache: introduced min_free cache clearing.
Clearing cache based on free space left on a file system is
expected to allow better disk utilization in some cases, notably
when disk space might be also used for something other than nginx
cache (including nginx own temporary files) and while loading
cache (when cache size might be inaccurate for a while, effectively
disabling max_size cache clearing).
Based on a patch by Adam Bambuch.
author | Maxim Dounin <mdounin@mdounin.ru> |
---|---|
date | Mon, 22 Jun 2020 18:03:00 +0300 |
parents | 53eb1e67e432 |
children |
rev | line source |
---|---|
2725 | 1 |
2 /* | |
3 * Copyright (C) Igor Sysoev | |
4412 | 4 * Copyright (C) Nginx, Inc. |
2725 | 5 */ |
6 | |
7 | |
8 #include <ngx_config.h> | |
9 #include <ngx_core.h> | |
10 #include <ngx_event.h> | |
11 | |
12 | |
13 ssize_t | |
14 ngx_wsasend(ngx_connection_t *c, u_char *buf, size_t size) | |
15 { | |
16 int n; | |
17 u_long sent; | |
18 ngx_err_t err; | |
19 ngx_event_t *wev; | |
20 WSABUF wsabuf; | |
21 | |
22 wev = c->write; | |
23 | |
24 if (!wev->ready) { | |
25 return NGX_AGAIN; | |
26 } | |
27 | |
28 /* | |
29 * WSABUF must be 4-byte aligned otherwise | |
30 * WSASend() will return undocumented WSAEINVAL error. | |
31 */ | |
32 | |
33 wsabuf.buf = (char *) buf; | |
34 wsabuf.len = size; | |
35 | |
36 sent = 0; | |
37 | |
38 n = WSASend(c->fd, &wsabuf, 1, &sent, 0, NULL, NULL); | |
39 | |
40 ngx_log_debug4(NGX_LOG_DEBUG_EVENT, c->log, 0, | |
41 "WSASend: fd:%d, %d, %ul of %uz", c->fd, n, sent, size); | |
42 | |
43 if (n == 0) { | |
44 if (sent < size) { | |
45 wev->ready = 0; | |
46 } | |
47 | |
48 c->sent += sent; | |
49 | |
50 return sent; | |
51 } | |
52 | |
53 err = ngx_socket_errno; | |
54 | |
55 if (err == WSAEWOULDBLOCK) { | |
56 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, err, "WSASend() not ready"); | |
5232
53eb1e67e432
Win32: added missing reset of wev->ready on WSAEWOULDBLOCK.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4412
diff
changeset
|
57 wev->ready = 0; |
2725 | 58 return NGX_AGAIN; |
59 } | |
60 | |
61 wev->error = 1; | |
62 ngx_connection_error(c, err, "WSASend() failed"); | |
63 | |
64 return NGX_ERROR; | |
65 } | |
66 | |
67 | |
68 ssize_t | |
69 ngx_overlapped_wsasend(ngx_connection_t *c, u_char *buf, size_t size) | |
70 { | |
71 int n; | |
72 u_long sent; | |
73 ngx_err_t err; | |
74 ngx_event_t *wev; | |
75 LPWSAOVERLAPPED ovlp; | |
76 WSABUF wsabuf; | |
77 | |
78 wev = c->write; | |
79 | |
80 if (!wev->ready) { | |
81 return NGX_AGAIN; | |
82 } | |
83 | |
84 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0, | |
85 "wev->complete: %d", wev->complete); | |
86 | |
87 if (!wev->complete) { | |
88 | |
89 /* post the overlapped WSASend() */ | |
90 | |
91 /* | |
92 * WSABUFs must be 4-byte aligned otherwise | |
93 * WSASend() will return undocumented WSAEINVAL error. | |
94 */ | |
95 | |
96 wsabuf.buf = (char *) buf; | |
97 wsabuf.len = size; | |
98 | |
99 sent = 0; | |
100 | |
101 ovlp = (LPWSAOVERLAPPED) &c->write->ovlp; | |
102 ngx_memzero(ovlp, sizeof(WSAOVERLAPPED)); | |
103 | |
104 n = WSASend(c->fd, &wsabuf, 1, &sent, 0, ovlp, NULL); | |
105 | |
106 ngx_log_debug4(NGX_LOG_DEBUG_EVENT, c->log, 0, | |
107 "WSASend: fd:%d, %d, %ul of %uz", c->fd, n, sent, size); | |
108 | |
109 wev->complete = 0; | |
110 | |
111 if (n == 0) { | |
112 if (ngx_event_flags & NGX_USE_IOCP_EVENT) { | |
113 | |
114 /* | |
115 * if a socket was bound with I/O completion port then | |
116 * GetQueuedCompletionStatus() would anyway return its status | |
117 * despite that WSASend() was already complete | |
118 */ | |
119 | |
120 wev->active = 1; | |
121 return NGX_AGAIN; | |
122 } | |
123 | |
124 if (sent < size) { | |
125 wev->ready = 0; | |
126 } | |
127 | |
128 c->sent += sent; | |
129 | |
130 return sent; | |
131 } | |
132 | |
133 err = ngx_socket_errno; | |
134 | |
135 if (err == WSA_IO_PENDING) { | |
136 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, err, | |
137 "WSASend() posted"); | |
138 wev->active = 1; | |
139 return NGX_AGAIN; | |
140 } | |
141 | |
142 wev->error = 1; | |
143 ngx_connection_error(c, err, "WSASend() failed"); | |
144 | |
145 return NGX_ERROR; | |
146 } | |
147 | |
148 /* the overlapped WSASend() complete */ | |
149 | |
150 wev->complete = 0; | |
151 wev->active = 0; | |
152 | |
153 if (ngx_event_flags & NGX_USE_IOCP_EVENT) { | |
154 | |
155 if (wev->ovlp.error) { | |
156 ngx_connection_error(c, wev->ovlp.error, "WSASend() failed"); | |
157 return NGX_ERROR; | |
158 } | |
159 | |
160 sent = wev->available; | |
161 | |
162 } else { | |
163 if (WSAGetOverlappedResult(c->fd, (LPWSAOVERLAPPED) &wev->ovlp, | |
164 &sent, 0, NULL) | |
165 == 0) | |
166 { | |
167 ngx_connection_error(c, ngx_socket_errno, | |
168 "WSASend() or WSAGetOverlappedResult() failed"); | |
169 | |
170 return NGX_ERROR; | |
171 } | |
172 } | |
173 | |
174 ngx_log_debug3(NGX_LOG_DEBUG_EVENT, c->log, 0, | |
175 "WSAGetOverlappedResult: fd:%d, %ul of %uz", | |
176 c->fd, sent, size); | |
177 | |
178 if (sent < size) { | |
179 wev->ready = 0; | |
180 } | |
181 | |
182 c->sent += sent; | |
183 | |
184 return sent; | |
185 } |