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comparison src/os/unix/ngx_readv_chain.c @ 188:0061d1f0908d

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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 }