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
|
/*************************************************************************
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* Copyright 2008 by Sun Microsystems, Inc.
*
* OpenOffice.org - a multi-platform office productivity suite
*
* $RCSfile: AsyncronousLink.cxx,v $
* $Revision: 1.9 $
*
* This file is part of OpenOffice.org.
*
* OpenOffice.org is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License version 3
* only, as published by the Free Software Foundation.
*
* OpenOffice.org 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 Lesser General Public License version 3 for more details
* (a copy is included in the LICENSE file that accompanied this code).
*
* You should have received a copy of the GNU Lesser General Public License
* version 3 along with OpenOffice.org. If not, see
* <http://www.openoffice.org/license.html>
* for a copy of the LGPLv3 License.
*
************************************************************************/
// MARKER(update_precomp.py): autogen include statement, do not remove
#include "precompiled_dbaccess.hxx"
#ifndef DBAUI_ASYNCRONOUSLINK_HXX
#include "AsyncronousLink.hxx"
#endif
#ifndef _SV_SVAPP_HXX
#include <vcl/svapp.hxx>
#endif
#ifndef _TOOLS_DEBUG_HXX
#include <tools/debug.hxx>
#endif
//==================================================================
//= OAsyncronousLink
//==================================================================
using namespace dbaui;
DBG_NAME(OAsyncronousLink)
//------------------------------------------------------------------
OAsyncronousLink::OAsyncronousLink( const Link& _rHandler )
:m_aHandler(_rHandler)
,m_aEventSafety()
,m_aDestructionSafety()
,m_nEventId(0)
{
DBG_CTOR(OAsyncronousLink,NULL);
}
//------------------------------------------------------------------
OAsyncronousLink::~OAsyncronousLink()
{
{
::osl::MutexGuard aEventGuard( m_aEventSafety );
if ( m_nEventId )
Application::RemoveUserEvent(m_nEventId);
m_nEventId = 0;
}
{
::osl::MutexGuard aDestructionGuard( m_aDestructionSafety );
// this is just for the case we're deleted while another thread just handled the event :
// if this other thread called our link while we were deleting the event here, the
// link handler blocked. With leaving the above block it continued, but now we are prevented
// to leave this destructor 'til the link handler recognizes that nEvent == 0 and leaves.
}
DBG_DTOR(OAsyncronousLink,NULL);
}
//------------------------------------------------------------------
void OAsyncronousLink::Call( void* _pArgument )
{
::osl::MutexGuard aEventGuard( m_aEventSafety );
if (m_nEventId)
Application::RemoveUserEvent(m_nEventId);
m_nEventId = Application::PostUserEvent( LINK( this, OAsyncronousLink, OnAsyncCall ), _pArgument );
}
//------------------------------------------------------------------
void OAsyncronousLink::CancelCall()
{
::osl::MutexGuard aEventGuard( m_aEventSafety );
if ( m_nEventId )
Application::RemoveUserEvent( m_nEventId );
m_nEventId = 0;
}
//------------------------------------------------------------------
IMPL_LINK(OAsyncronousLink, OnAsyncCall, void*, _pArg)
{
{
::osl::MutexGuard aDestructionGuard( m_aDestructionSafety );
{
::osl::MutexGuard aEventGuard( m_aEventSafety );
if (!m_nEventId)
// our destructor deleted the event just while we we're waiting for m_aEventSafety
// -> get outta here
return 0;
m_nEventId = 0;
}
}
if (m_aHandler.IsSet())
return m_aHandler.Call(_pArg);
return 0L;
}
|
