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
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
|
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.apache.org/licenses/LICENSE-2.0 .
*/
#include "asyncrequests.hxx"
#include <vcl/svapp.hxx>
#include <vcl/winscheduler.hxx>
#include <osl/mutex.hxx>
namespace fpicker{
namespace win32{
namespace vista{
static void lcl_sleep( ::osl::Condition& aCondition,
::sal_Int32 nMilliSeconds )
{
if (nMilliSeconds < 1)
aCondition.wait();
else
{
TimeValue aTime;
aTime.Seconds = (nMilliSeconds / 1000);
aTime.Nanosec = (nMilliSeconds % 1000) * 1000000;
aCondition.wait(&aTime);
}
}
void Request::wait( ::sal_Int32 nMilliSeconds )
{
SolarMutexReleaser aReleaser;
lcl_sleep( m_aJoiner, nMilliSeconds );
}
void Request::waitProcessMessages()
{
SolarMutexGuard aGuard;
while ( !m_aJoiner.check() )
Application::Yield();
}
void Request::notify()
{
m_aJoiner.set();
// Make sure that main loop receives at least this message to return from GetMessage and recheck
// the condition, even in case when there's no visible application windows present, and thus no
// other messages might arrive to the main loop.
WinScheduler::PostDummyMessage();
}
AsyncRequests::AsyncRequests(const RequestHandlerRef& rHandler)
: ::cppu::BaseMutex( )
, ::osl::Thread ( )
, m_bFinish (false)
, m_rHandler (rHandler )
, m_lRequests ( )
{
}
AsyncRequests::~AsyncRequests()
{
// SYNCHRONIZED ->
{
osl::MutexGuard aLock(m_aMutex);
m_bFinish = true;
}
// <- SYNCHRONIZED
// The static AsyncRequests aNotify in VistaFilePickerEventHandler::impl_sendEvent
// is destructed at DLL atexit. But it won't run, so needs no join and release of
// the already destructed SolarMutex, which would crash LO on exit.
if (isRunning())
{
// tdf#123502: make sure we actually hold the mutex before releasing it
// UNO directly destroys the VistaFilePicker object, so we need GUI protection in there.
// But since we redirect GUI stuff to the async thread we also have to release it, so we
// can join it, if the thread currently blocks on the SolarMutex.
SolarMutexGuard aGuard;
SolarMutexReleaser aReleaser;
join();
}
}
void AsyncRequests::triggerJobExecution()
{
if ( ! isRunning())
create();
else
maWait.set();
}
void AsyncRequests::triggerRequestProcessMessages (const RequestRef& rRequest)
{
// SYNCHRONIZED ->
{
osl::MutexGuard aLock(m_aMutex);
m_lRequests.push(rRequest);
}
// <- SYNCHRONIZED
rRequest->waitProcessMessages();
}
void AsyncRequests::triggerRequestBlocked(const RequestRef& rRequest)
{
// SYNCHRONIZED ->
{
osl::MutexGuard aLock(m_aMutex);
m_lRequests.push(rRequest);
}
// <- SYNCHRONIZED
triggerJobExecution();
rRequest->wait();
}
void AsyncRequests::triggerRequestNonBlocked(const RequestRef& rRequest)
{
// SYNCHRONIZED ->
{
osl::MutexGuard aLock(m_aMutex);
m_lRequests.push(rRequest);
}
// <- SYNCHRONIZED
triggerJobExecution();
}
void AsyncRequests::triggerRequestDirectly(const RequestRef& rRequest)
{
// SYNCHRONIZED ->
osl::ClearableMutexGuard aLock(m_aMutex);
RequestHandlerRef rHandler = m_rHandler;
aLock.clear();
// <- SYNCHRONIZED
if (rHandler != nullptr)
rHandler->doRequest(rRequest);
}
void AsyncRequests::triggerRequestThreadAware(const RequestRef& rRequest,
::sal_Int16 nWait )
{
oslThreadIdentifier nOurThreadId = getIdentifier();
oslThreadIdentifier nCallerThreadId = ::osl::Thread::getCurrentIdentifier();
SolarMutexGuard aGuard;
if (nOurThreadId == nCallerThreadId)
triggerRequestDirectly(rRequest);
else if (nWait == BLOCKED)
triggerRequestBlocked(rRequest);
else if (nWait == PROCESS_MESSAGES)
triggerRequestProcessMessages(rRequest);
else
triggerRequestNonBlocked(rRequest);
}
void SAL_CALL AsyncRequests::run()
{
osl_setThreadName("fpicker::win32::vista::AsyncRequests");
static const ::sal_Int32 TIME_TO_WAIT_FOR_NEW_REQUESTS = 250;
// SYNCHRONIZED ->
::osl::ResettableMutexGuard aLock(m_aMutex);
RequestHandlerRef rHandler = m_rHandler;
bool bFinished = m_bFinish;
aLock.clear();
// <- SYNCHRONIZED
if (rHandler != nullptr)
rHandler->before();
while ( ! bFinished)
{
// SYNCHRONIZED ->
aLock.reset();
RequestRef rRequest;
if ( ! m_lRequests.empty())
{
rRequest = m_lRequests.front();
m_lRequests.pop();
}
bFinished = m_bFinish;
aLock.clear();
// <- SYNCHRONIZED
if (rRequest == nullptr)
{
lcl_sleep(maWait, TIME_TO_WAIT_FOR_NEW_REQUESTS);
maWait.reset();
continue;
}
if (rHandler != nullptr)
{
rHandler->doRequest(rRequest);
rRequest->notify();
}
}
if (rHandler != nullptr)
rHandler->after();
}
} // namespace vista
} // namespace win32
} // namespace fpicker
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
|
