Mercurial > hg > nginx
comparison src/os/unix/ngx_readv_chain.c @ 188:0061d1f0908d
nginx-0.0.1-2003-11-18-11:04:34 import
author | Igor Sysoev <igor@sysoev.ru> |
---|---|
date | Tue, 18 Nov 2003 08:04:34 +0000 |
parents | 84036764e215 |
children | 70e1c7d2b83d |
comparison
equal
deleted
inserted
replaced
187:5a9bbe99008b | 188:0061d1f0908d |
---|---|
1 | 1 |
2 #include <ngx_config.h> | 2 #include <ngx_config.h> |
3 #include <ngx_core.h> | 3 #include <ngx_core.h> |
4 #include <ngx_event.h> | 4 #include <ngx_event.h> |
5 | 5 |
6 | |
7 static int ngx_readv_error(ngx_event_t *rev, ngx_err_t err); | |
8 | |
9 #if (HAVE_KQUEUE) | |
6 | 10 |
7 ssize_t ngx_readv_chain(ngx_connection_t *c, ngx_chain_t *chain) | 11 ssize_t ngx_readv_chain(ngx_connection_t *c, ngx_chain_t *chain) |
8 { | 12 { |
9 char *prev; | 13 char *prev; |
10 ssize_t n, size; | 14 ssize_t n, size; |
11 struct iovec *iov; | 15 struct iovec *iov; |
12 ngx_err_t err; | 16 ngx_err_t err; |
13 ngx_array_t io; | 17 ngx_array_t io; |
18 ngx_event_t *rev; | |
19 | |
20 rev = c->read; | |
21 | |
22 if (ngx_event_flags & NGX_HAVE_KQUEUE_EVENT) { | |
23 ngx_log_debug(c->log, "recv: eof:%d, avail:%d, err:%d" _ | |
24 rev->kq_eof _ rev->available _ rev->kq_errno); | |
25 | |
26 if (rev->available == 0) { | |
27 if (rev->kq_eof) { | |
28 rev->ready = 0; | |
29 rev->eof = 1; | |
30 | |
31 if (rev->kq_errno) { | |
32 rev->error = 1; | |
33 ngx_set_socket_errno(rev->kq_errno); | |
34 return ngx_readv_error(rev, rev->kq_errno); | |
35 } | |
36 | |
37 return 0; | |
38 | |
39 } else { | |
40 return NGX_AGAIN; | |
41 } | |
42 } | |
43 } | |
14 | 44 |
15 prev = NULL; | 45 prev = NULL; |
16 iov = NULL; | 46 iov = NULL; |
17 size = 0; | 47 size = 0; |
18 | 48 |
35 chain = chain->next; | 65 chain = chain->next; |
36 } | 66 } |
37 | 67 |
38 ngx_log_debug(c->log, "recv: %d:%d" _ io.nelts _ iov->iov_len); | 68 ngx_log_debug(c->log, "recv: %d:%d" _ io.nelts _ iov->iov_len); |
39 | 69 |
40 n = readv(c->fd, (struct iovec *) io.elts, io.nelts); | 70 rev = c->read; |
41 | 71 |
42 if (n == 0) { | 72 do { |
43 c->read->eof = 1; | 73 n = readv(c->fd, (struct iovec *) io.elts, io.nelts); |
44 | 74 |
45 } else if (n == -1) { | 75 if (n >= 0) { |
46 c->read->ready = 0; | 76 if (ngx_event_flags & NGX_HAVE_KQUEUE_EVENT) { |
47 | 77 rev->available -= n; |
48 err = ngx_errno; | 78 |
49 if (err == NGX_EAGAIN) { | 79 /* |
50 ngx_log_error(NGX_LOG_INFO, c->log, err, "readv() returned EAGAIN"); | 80 * rev->available can be negative here because some additional |
51 return NGX_AGAIN; | 81 * bytes can be received between kevent() and recv() |
52 } | 82 */ |
53 | 83 |
84 if (rev->available <= 0) { | |
85 if (!rev->kq_eof) { | |
86 rev->ready = 0; | |
87 } | |
88 | |
89 if (rev->available < 0) { | |
90 rev->available = 0; | |
91 } | |
92 } | |
93 | |
94 return n; | |
95 } | |
96 | |
97 if (n < size) { | |
98 rev->ready = 0; | |
99 } | |
100 | |
101 if (n == 0) { | |
102 rev->eof = 1; | |
103 } | |
104 | |
105 return n; | |
106 } | |
107 | |
108 n = ngx_readv_error(rev, ngx_socket_errno); | |
109 | |
110 } while (n == NGX_EINTR); | |
111 | |
112 /* NGX_ERROR || NGX_AGAIN */ | |
113 | |
114 rev->ready = 0; | |
115 | |
116 if (n == NGX_ERROR){ | |
54 c->read->error = 1; | 117 c->read->error = 1; |
55 ngx_log_error(NGX_LOG_ERR, c->log, err, "readv() failed"); | |
56 return NGX_ERROR; | |
57 | |
58 } else if (n < size) { | |
59 c->read->ready = 0; | |
60 } | 118 } |
61 | 119 |
62 return n; | 120 return n; |
63 } | 121 } |
122 | |
123 #else /* ! NAVE_KQUEUE */ | |
124 | |
125 ssize_t ngx_readv_chain(ngx_connection_t *c, ngx_chain_t *chain) | |
126 { | |
127 char *prev; | |
128 ssize_t n, size; | |
129 struct iovec *iov; | |
130 ngx_err_t err; | |
131 ngx_array_t io; | |
132 ngx_event_t *rev; | |
133 | |
134 prev = NULL; | |
135 iov = NULL; | |
136 size = 0; | |
137 | |
138 ngx_init_array(io, c->pool, 10, sizeof(struct iovec), NGX_ERROR); | |
139 | |
140 /* coalesce the neighbouring hunks */ | |
141 | |
142 while (chain) { | |
143 if (prev == chain->hunk->last) { | |
144 iov->iov_len += chain->hunk->end - chain->hunk->last; | |
145 | |
146 } else { | |
147 ngx_test_null(iov, ngx_push_array(&io), NGX_ERROR); | |
148 iov->iov_base = chain->hunk->last; | |
149 iov->iov_len = chain->hunk->end - chain->hunk->last; | |
150 } | |
151 | |
152 size += chain->hunk->end - chain->hunk->last; | |
153 prev = chain->hunk->end; | |
154 chain = chain->next; | |
155 } | |
156 | |
157 ngx_log_debug(c->log, "recv: %d:%d" _ io.nelts _ iov->iov_len); | |
158 | |
159 rev = c->read; | |
160 | |
161 do { | |
162 n = readv(c->fd, (struct iovec *) io.elts, io.nelts); | |
163 | |
164 if (n >= 0) { | |
165 if (n < size) { | |
166 rev->ready = 0; | |
167 } | |
168 | |
169 if (n == 0) { | |
170 rev->eof = 1; | |
171 } | |
172 | |
173 return n; | |
174 } | |
175 | |
176 n = ngx_readv_error(rev, ngx_socket_errno); | |
177 | |
178 } while (n == NGX_EINTR); | |
179 | |
180 /* NGX_ERROR || NGX_AGAIN */ | |
181 | |
182 rev->ready = 0; | |
183 | |
184 if (n == NGX_ERROR){ | |
185 c->read->error = 1; | |
186 } | |
187 | |
188 return n; | |
189 } | |
190 | |
191 #endif /* NAVE_KQUEUE */ | |
192 | |
193 | |
194 static int ngx_readv_error(ngx_event_t *rev, ngx_err_t err) | |
195 { | |
196 if (err == NGX_EAGAIN) { | |
197 ngx_log_error(NGX_LOG_INFO, rev->log, err, "readv() returned EAGAIN"); | |
198 return NGX_AGAIN; | |
199 } | |
200 | |
201 if (err == NGX_EINTR) { | |
202 ngx_log_error(NGX_LOG_INFO, rev->log, err, "readv() returned EINTR"); | |
203 return NGX_EINTR; | |
204 } | |
205 | |
206 ngx_log_error(NGX_LOG_ERR, rev->log, err, "readv() failed"); | |
207 | |
208 return NGX_ERROR; | |
209 } |