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
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
|
/*************************************************************************
*
* OpenOffice.org - a multi-platform office productivity suite
*
* $RCSfile: AsyncronousLink.cxx,v $
*
* $Revision: 1.5 $
*
* last change: $Author: hr $ $Date: 2006-06-20 02:55:35 $
*
* The Contents of this file are made available subject to
* the terms of GNU Lesser General Public License Version 2.1.
*
*
* GNU Lesser General Public License Version 2.1
* =============================================
* Copyright 2005 by Sun Microsystems, Inc.
* 901 San Antonio Road, Palo Alto, CA 94303, USA
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License version 2.1, as published by the Free Software Foundation.
*
* This library 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 for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*
************************************************************************/
#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, ::vos::OMutex* _pEventSafety, ::vos::OMutex* _pDestructionSafety)
:m_aHandler(_rHandler)
,m_pEventSafety(NULL)
,m_pDestructionSafety(NULL)
,m_bOwnMutexes(FALSE)
,m_nEventId(0)
{
DBG_CTOR(OAsyncronousLink,NULL);
if (_pEventSafety && _pDestructionSafety)
{
m_pEventSafety = _pEventSafety;
m_pDestructionSafety = _pDestructionSafety;
m_bOwnMutexes = FALSE;
}
else
{
m_pEventSafety = new ::vos::OMutex;
m_pDestructionSafety = new ::vos::OMutex;
m_bOwnMutexes = TRUE;
}
}
//------------------------------------------------------------------
OAsyncronousLink::~OAsyncronousLink()
{
{
::vos::OGuard aEventGuard(*m_pEventSafety);
if (m_nEventId)
Application::RemoveUserEvent(m_nEventId);
m_nEventId = 0;
}
{
::vos::OGuard aDestructionGuard(*m_pDestructionSafety);
// 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.
}
if (m_bOwnMutexes)
{
delete m_pEventSafety;
delete m_pDestructionSafety;
}
m_pEventSafety = NULL;
m_pDestructionSafety = NULL;
DBG_DTOR(OAsyncronousLink,NULL);
}
//------------------------------------------------------------------
void OAsyncronousLink::Call(void* /*_pArgument*/)
{
::vos::OGuard aEventGuard(*m_pEventSafety);
if (m_nEventId)
Application::RemoveUserEvent(m_nEventId);
m_nEventId = Application::PostUserEvent(LINK(this, OAsyncronousLink, OnAsyncCall));
}
//------------------------------------------------------------------
void OAsyncronousLink::CancelCall()
{
::vos::OGuard aEventGuard(*m_pEventSafety);
if (m_nEventId)
Application::RemoveUserEvent(m_nEventId);
m_nEventId = 0;
}
//------------------------------------------------------------------
IMPL_LINK(OAsyncronousLink, OnAsyncCall, void*, _pArg)
{
{
::vos::OGuard aDestructionGuard(*m_pDestructionSafety);
{
::vos::OGuard aEventGuard(*m_pEventSafety);
if (!m_nEventId)
// our destructor deleted the event just while we we're waiting for m_pEventSafety
// -> get outta here
return 0;
m_nEventId = 0;
}
}
if (m_aHandler.IsSet())
return m_aHandler.Call(_pArg);
return 0L;
}
|
