source: sources/src/pcSyncDataObject.cc @ 1485:3a149151a9cd

Revision 1485:3a149151a9cd, 2.3 KB checked in by niam, 21 months ago (diff)

[pc::sync] acquire returns false if the lock was not acquired within given timeout

Line 
1/***************************************************************************
2 *            pcSyncDataObject.cc
3 *
4 *  Sun Jul 22 2007
5 *  Copyright  2007  Dmytro Milinevskyy
6 *  milinevskyy@gmail.com
7 ****************************************************************************/
8
9/*
10 *  This program is free software; you can redistribute it and/or modify
11 *  it under the terms of the GNU Lesser General Public License version 2.1 as published by
12 *  the Free Software Foundation;
13 *
14 *  This program is distributed in the hope that it will be useful,
15 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
16 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
17 *  GNU Library General Public License for more details.
18 *
19 *  You should have received a copy of the GNU Lesser General Public License
20 *  along with this program; if not, write to the Free Software
21 *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
22 */
23
24/**
25 * vim indentation settings
26 * set tabstop=4
27 * set shiftwidth=4
28 */
29
30#include <libdodo/directives.h>
31
32#include <libdodo/pcSyncDataObject.h>
33#include <libdodo/pcSyncDataObjectEx.h>
34#include <libdodo/pcSyncProtector.h>
35#include <libdodo/pcSyncStack.h>
36#include <libdodo/types.h>
37
38using namespace dodo::pc::sync::data;
39
40object::object(protector &lock) : data(NULL),
41                                  lock(lock)
42{
43}
44
45//-------------------------------------------------------------------
46
47object::~object()
48{
49}
50
51//-------------------------------------------------------------------
52
53void
54object::set(void *a_data)
55{
56    sync::stack g(&lock);
57
58    data = a_data;
59}
60//-------------------------------------------------------------------
61
62const void *
63object::get()
64{
65    sync::stack g(&lock);
66
67    return data;
68}
69
70//-------------------------------------------------------------------
71
72void *
73object::acquire(unsigned long timeout)
74{
75    if (!lock.acquire(timeout))
76        dodo_throw exception::basic(exception::MODULE_PCSYNCDATAOBJECT, DATAOBJECTEX_ACQUIRE, exception::ERRNO_LIBDODO, DATAOBJECTEX_CANNOTLOCK, PCSYNCDATAOBJECTEX_CANNOTLOCK_STR, __LINE__, __FILE__);
77
78    return data;
79}
80
81//-------------------------------------------------------------------
82
83void
84object::release()
85{
86    lock.release();
87}
88
89//-------------------------------------------------------------------
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