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
|
/***************************************************************************
lib/ibRsv.c
-------------------
copyright : (C) 2001,2002,2003 by Frank Mori Hess
email : fmhess@users.sourceforge.net
***************************************************************************/
/***************************************************************************
* *
* 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; either version 2 of the License, or *
* (at your option) any later version. *
* *
***************************************************************************/
#include "ib_internal.h"
int internal_ibrsv2(ibConf_t *conf, int status_byte, int new_reason_for_service)
{
ibBoard_t *board;
struct gpib_request_service2 cmd;
int retval;
const int MSS = status_byte & request_service_bit;
if (!conf->is_interface) {
setIberr(EARG);
return -1;
}
if ((status_byte & 0xff) != status_byte) {
setIberr(EARG);
return -1;
}
board = interfaceBoard(conf);
cmd.status_byte = status_byte;
cmd.new_reason_for_service = new_reason_for_service;
/* prefer using IBRSV if it is sufficient, since it is supported
* by older versions of the kernel modules. */
if (MSS == 0 || (MSS && new_reason_for_service))
retval = ioctl(board->fileno, IBRSV, &cmd.status_byte);
else
retval = ioctl(board->fileno, IBRSV2, &cmd);
if (retval < 0) {
if (errno == EOPNOTSUPP) {
setIberr(ECAP);
} else {
setIberr(EDVR);
setIbcnt(errno);
}
return retval;
}
return 0;
}
/* FIXME: NI's version returns old status byte in iberr on success.
* Why that is at all useful, I do not know. */
int ibrsv(int ud, int status_byte)
{
return ibrsv2(ud, status_byte, status_byte & request_service_bit);
}
int ibrsv2(int ud, int status_byte, int new_reason_for_service)
{
ibConf_t *conf;
int retval;
conf = enter_library(ud);
if (!conf)
return exit_library(ud, 1);
retval = internal_ibrsv2(conf, status_byte, new_reason_for_service);
if (retval < 0)
return exit_library(ud, 1);
return exit_library(ud, 0);
}
|
