1
/* Copyright (C) 2000 MySQL AB
3
This program is free software; you can redistribute it and/or modify
4
it under the terms of the GNU General Public License as published by
5
the Free Software Foundation; version 2 of the License.
7
This program is distributed in the hope that it will be useful,
8
but WITHOUT ANY WARRANTY; without even the implied warranty of
9
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
10
GNU General Public License for more details.
12
You should have received a copy of the GNU General Public License
13
along with this program; if not, write to the Free Software
14
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
17
Note that we can't have assertion on file descriptors; The reason for
18
this is that during mysql shutdown, another thread can close a file
19
we are working on. In this case we should just return read errors from
24
#include <drizzled/global.h>
30
* Helper to fill most of the Vio* with defaults.
33
static void drizzleclient_vio_init(Vio* vio, enum enum_vio_type type,
34
int sd, uint32_t flags)
36
memset(vio, 0, sizeof(*vio));
39
if ((flags & VIO_BUFFERED_READ) &&
40
!(vio->read_buffer= (char*)malloc(VIO_READ_BUFFER_SIZE)))
41
flags&= ~VIO_BUFFERED_READ;
43
vio->viodelete =drizzleclient_vio_delete;
44
vio->vioerrno =drizzleclient_vio_errno;
45
vio->read= (flags & VIO_BUFFERED_READ) ? drizzleclient_vio_read_buff : drizzleclient_vio_read;
46
vio->write =drizzleclient_vio_write;
47
vio->fastsend =drizzleclient_vio_fastsend;
48
vio->viokeepalive =drizzleclient_vio_keepalive;
49
vio->should_retry =drizzleclient_vio_should_retry;
50
vio->was_interrupted=drizzleclient_vio_was_interrupted;
51
vio->vioclose =drizzleclient_vio_close;
52
vio->peer_addr =drizzleclient_vio_peer_addr;
53
vio->vioblocking =drizzleclient_vio_blocking;
54
vio->is_blocking =drizzleclient_vio_is_blocking;
55
vio->timeout =drizzleclient_vio_timeout;
60
/* Reset initialized VIO to use with another transport type */
62
void drizzleclient_vio_reset(Vio* vio, enum enum_vio_type type,
63
int sd, uint32_t flags)
65
free(vio->read_buffer);
66
drizzleclient_vio_init(vio, type, sd, flags);
70
/* Open the socket or TCP/IP connection and read the fnctl() status */
72
Vio *drizzleclient_vio_new(int sd, enum enum_vio_type type, uint32_t flags)
74
Vio *vio = (Vio*) malloc(sizeof(Vio));
78
drizzleclient_vio_init(vio, type, sd, flags);
79
sprintf(vio->desc, "TCP/IP (%d)", vio->sd);
81
We call fcntl() to set the flags and then immediately read them back
82
to make sure that we and the system are in agreement on the state of
85
An example of why we need to do this is FreeBSD (and apparently some
86
other BSD-derived systems, like Mac OS X), where the system sometimes
87
reports that the socket is set for non-blocking when it really will
90
fcntl(sd, F_SETFL, 0);
91
vio->fcntl_mode= fcntl(sd, F_GETFL);
97
void drizzleclient_vio_delete(Vio* vio)
100
return; /* It must be safe to delete null pointers. */
102
if (vio->type != VIO_CLOSED)
104
free((unsigned char*) vio->read_buffer);
105
free((unsigned char*) vio);
110
Cleanup memory allocated by vio or the
111
components below it when application finish
114
void drizzleclient_vio_end(void)
added
removed
plugin/mysql_protocol/vio.cc
