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
|
//# showtablelock.cc: This program shows if a table is used and/or locked
//# Copyright (C) 2009
//# Associated Universities, Inc. Washington DC, USA.
//#
//# 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.
//#
//# 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.,
//# 675 Massachusetts Ave, Cambridge, MA 02139, USA.
//#
//# Correspondence concerning AIPS++ should be addressed as follows:
//# Internet email: aips2-request@nrao.edu.
//# Postal address: AIPS++ Project Office
//# National Radio Astronomy Observatory
//# 520 Edgemont Road
//# Charlottesville, VA 22903-2475 USA
//#
//# $Id$
#include <casacore/tables/Tables/Table.h>
#include <casacore/tables/Tables/TableSyncData.h>
#include <casacore/casa/IO/LockFile.h>
#include <casacore/casa/Containers/BlockIO.h>
#include <casacore/casa/OS/Path.h>
#include <stdexcept>
#include <iostream>
using namespace casacore;
using namespace std;
void showVerbose (const String& lockFileName)
{
LockFile lfile(lockFileName);
TableSyncData data;
// Read the lock info from the file into a buffer.
// Thereafter interpret the data read.
lfile.getInfo (data.memoryIO());
rownr_t nrrow;
uInt nrcolumn;
Bool tableChanged;
Block<Bool> dataManChanged;
data.read (nrrow, nrcolumn, tableChanged, dataManChanged);
// Show the data.
cout << "Lock file info (of " << data.memoryIO().length() << " bytes)" << endl;
cout << " nrows: " << nrrow << endl;
cout << " ncolumns: " << nrcolumn << endl;
cout << " table changed: " << tableChanged << endl;
cout << " dataman changed: " << dataManChanged << endl;
cout << " modify counter: " << data.getModifyCounter() << endl;
int nrid = lfile.reqIds()[0];
cout << " " << nrid << " outstanding lock requests from other processes" << endl;
}
int main (int argc, char* argv[])
{
if (TableLock::lockingDisabled()) {
cerr << "Note: table locking is disabled because Casacore "
<< "was built with -DAIPS_TABLES_NOLOCKING" << endl;
}
int starg = 1;
Bool verbose = False;
if (argc > starg && String(argv[starg]) == "-v") {
verbose = True;
starg += 1;
}
if (argc <= starg) {
cerr << "Use as: showtablelock [-v] tablename" << endl;
cerr << " -v verbose" << endl;
return 1;
}
try {
String tablename(argv[starg]);
tablename = Path(tablename).absoluteName();
if (! Table::isReadable (tablename)) {
cerr << "Table " << tablename
<< " does not exist (or not readable)" << endl;
return 1;
}
String lockFileName(tablename + "/table.lock");
uInt pid = 0;
Bool permLocked = False;
uInt type = LockFile::showLock (pid, permLocked, lockFileName);
String perm;
if (permLocked) {
perm = "permanently ";
}
if (type == 1) {
cout << "Table " << tablename
<< " is opened (but not locked) in process " << pid << endl;
} else if (type == 2) {
cout << "Table " << tablename
<< " is " << perm << "read-locked in process " << pid << endl;
} else if (type == 3) {
cout << "Table " << tablename
<< " is " << perm << "write-locked in process " << pid << endl;
} else {
cout << "Table " << tablename
<< " is neither opened nor locked in another process" << endl;
}
if (verbose) {
showVerbose (lockFileName);
}
} catch (std::exception& x) {
cerr << x.what() << endl;
return 1;
}
return 0;
}
|
