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
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
|
/* Copyright (C) 2000 MySQL AB
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 of the License.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
/*
Note that we can't have assertion on file descriptors; The reason for
this is that during mysql shutdown, another thread can close a file
we are working on. In this case we should just return read errors from
the file descriptior.
*/
#include "vio_priv.h"
/*
* Helper to fill most of the Vio* with defaults.
*/
static void vio_init(Vio* vio, enum enum_vio_type type,
my_socket sd, HANDLE hPipe, uint flags)
{
#ifndef HAVE_VIO_READ_BUFF
flags&= ~VIO_BUFFERED_READ;
#endif
bzero((char*) vio, sizeof(*vio));
vio->type = type;
vio->sd = sd;
vio->hPipe = hPipe;
vio->localhost= flags & VIO_LOCALHOST;
if ((flags & VIO_BUFFERED_READ) &&
!(vio->read_buffer= (char*)my_malloc(VIO_READ_BUFFER_SIZE, MYF(MY_WME))))
flags&= ~VIO_BUFFERED_READ;
{
vio->viodelete =vio_delete;
vio->vioerrno =vio_errno;
vio->read= (flags & VIO_BUFFERED_READ) ? vio_read_buff : vio_read;
vio->write =vio_write;
vio->fastsend =vio_fastsend;
vio->viokeepalive =vio_keepalive;
vio->should_retry =vio_should_retry;
vio->was_interrupted=vio_was_interrupted;
vio->vioclose =vio_close;
vio->peer_addr =vio_peer_addr;
vio->vioblocking =vio_blocking;
vio->is_blocking =vio_is_blocking;
vio->timeout =vio_timeout;
}
}
/* Reset initialized VIO to use with another transport type */
void vio_reset(Vio* vio, enum enum_vio_type type,
my_socket sd, HANDLE hPipe, uint flags)
{
my_free(vio->read_buffer, MYF(MY_ALLOW_ZERO_PTR));
vio_init(vio, type, sd, hPipe, flags);
}
/* Open the socket or TCP/IP connection and read the fnctl() status */
Vio *vio_new(my_socket sd, enum enum_vio_type type, uint flags)
{
Vio *vio;
if ((vio = (Vio*) my_malloc(sizeof(*vio),MYF(MY_WME))))
{
vio_init(vio, type, sd, 0, flags);
sprintf(vio->desc,
(vio->type == VIO_TYPE_SOCKET ? "socket (%d)" : "TCP/IP (%d)"),
vio->sd);
#if !defined(NO_FCNTL_NONBLOCK)
/*
We call fcntl() to set the flags and then immediately read them back
to make sure that we and the system are in agreement on the state of
things.
An example of why we need to do this is FreeBSD (and apparently some
other BSD-derived systems, like Mac OS X), where the system sometimes
reports that the socket is set for non-blocking when it really will
block.
*/
fcntl(sd, F_SETFL, 0);
vio->fcntl_mode= fcntl(sd, F_GETFL);
#elif defined(HAVE_SYS_IOCTL_H) /* hpux */
/* Non blocking sockets doesn't work good on HPUX 11.0 */
(void) ioctl(sd,FIOSNBIO,0);
vio->fcntl_mode &= ~O_NONBLOCK;
#endif
}
return vio;
}
void vio_delete(Vio* vio)
{
if (!vio)
return; /* It must be safe to delete null pointers. */
if (vio->type != VIO_CLOSED)
vio->vioclose(vio);
my_free((uchar*) vio->read_buffer, MYF(MY_ALLOW_ZERO_PTR));
my_free((uchar*) vio,MYF(0));
}
/*
Cleanup memory allocated by vio or the
components below it when application finish
*/
void vio_end(void)
{
}
|