1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
|
#include <ngx_config.h>
#include <ngx_core.h>
#include <ngx_event.h>
ssize_t ngx_readv_chain(ngx_connection_t *c, ngx_chain_t *chain)
{
char *prev;
ssize_t n;
struct iovec *iov;
ngx_err_t err;
ngx_array_t io;
prev = NULL;
iov = NULL;
ngx_init_array(io, c->pool, 10, sizeof(struct iovec), NGX_ERROR);
/* coalesce the neighbouring hunks */
while (chain) {
if (prev == chain->hunk->last) {
iov->iov_len += chain->hunk->end - chain->hunk->last;
} else {
ngx_test_null(iov, ngx_push_array(&io), NGX_ERROR);
iov->iov_base = chain->hunk->last;
iov->iov_len = chain->hunk->end - chain->hunk->last;
}
prev = chain->hunk->end;
chain = chain->next;
}
ngx_log_debug(c->log, "recv: %d:%d" _ io.nelts _ iov->iov_len);
n = readv(c->fd, (struct iovec *) io.elts, io.nelts);
if (n == 0) {
c->read->eof = 1;
} else if (n == -1) {
c->read->ready = 0;
c->read->error = 1;
err = ngx_errno;
if (err == NGX_EAGAIN) {
ngx_log_error(NGX_LOG_INFO, c->log, err, "readv() returned EAGAIN");
return NGX_AGAIN;
}
ngx_log_error(NGX_LOG_ERR, c->log, err, "readv() failed");
return NGX_ERROR;
}
return n;
}
|
