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
|
/* -*- 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 <osl/time.h>
#include <osl/diagnose.h>
#include <canvas/elapsedtime.hxx>
#if defined(WNT)
#if defined _MSC_VER
#pragma warning(push,1)
#endif
// TEMP!!!
// Awaiting corresponding functionality in OSL
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#include <winbase.h>
#include <mmsystem.h>
#endif
#if defined _MSC_VER
#pragma warning(pop)
#endif
#include <algorithm>
#include <limits>
namespace canvas {
namespace tools {
#if defined(WNT)
// TODO(Q2): is 0 okay for the failure case here?
double ElapsedTime::getSystemTime()
{
// TEMP!!!
// Awaiting corresponding functionality in OSL
// is there a performance counter available?
static bool bTimeSetupDone( false );
static bool bPerfTimerAvailable( false );
static LONGLONG nPerfCountFreq;
// TODO(F1): This _might_ cause problems, as it prevents correct
// time handling for very long lifetimes of this class's
// surrounding component in memory. When the difference between
// current sys time and nInitialCount exceeds IEEE double's
// mantissa, time will start to run jerky.
static LONGLONG nInitialCount;
if( !bTimeSetupDone )
{
if( QueryPerformanceFrequency(
reinterpret_cast<LARGE_INTEGER *>(&nPerfCountFreq) ) )
{
// read initial time:
QueryPerformanceCounter(
reinterpret_cast<LARGE_INTEGER *>(&nInitialCount) );
bPerfTimerAvailable = true;
}
bTimeSetupDone = true;
}
if( bPerfTimerAvailable )
{
LONGLONG nCurrCount;
QueryPerformanceCounter(
reinterpret_cast<LARGE_INTEGER *>(&nCurrCount) );
nCurrCount -= nInitialCount;
return double(nCurrCount) / nPerfCountFreq;
}
else
{
LONGLONG nCurrTime = timeGetTime();
return double(nCurrTime) / 1000.0;
}
}
#else // ! WNT
// TODO(Q2): is 0 okay for the failure case here?
double ElapsedTime::getSystemTime()
{
TimeValue aTimeVal;
if( osl_getSystemTime( &aTimeVal ) )
return ((aTimeVal.Nanosec * 10e-10) + aTimeVal.Seconds);
else
return 0.0;
}
#endif
ElapsedTime::ElapsedTime()
: m_pTimeBase(),
m_fLastQueriedTime( 0.0 ),
m_fStartTime( getSystemTime() ),
m_fFrozenTime( 0.0 ),
m_bInPauseMode( false ),
m_bInHoldMode( false )
{
}
ElapsedTime::ElapsedTime(
boost::shared_ptr<ElapsedTime> const & pTimeBase )
: m_pTimeBase( pTimeBase ),
m_fLastQueriedTime( 0.0 ),
m_fStartTime( getCurrentTime() ),
m_fFrozenTime( 0.0 ),
m_bInPauseMode( false ),
m_bInHoldMode( false )
{
}
void ElapsedTime::reset()
{
m_fLastQueriedTime = 0.0;
m_fStartTime = getCurrentTime();
m_fFrozenTime = 0.0;
m_bInPauseMode = false;
m_bInHoldMode = false;
}
void ElapsedTime::adjustTimer( double fOffset, bool /*bLimitToLastQueriedTime*/ )
{
// to make getElapsedTime() become _larger_, have to reduce
// m_fStartTime.
m_fStartTime -= fOffset;
// also adjust frozen time, this method must _always_ affect the
// value returned by getElapsedTime()!
if (m_bInHoldMode || m_bInPauseMode)
m_fFrozenTime += fOffset;
}
double ElapsedTime::getCurrentTime() const
{
return m_pTimeBase.get() == 0
? getSystemTime() : m_pTimeBase->getElapsedTimeImpl();
}
double ElapsedTime::getElapsedTime() const
{
m_fLastQueriedTime = getElapsedTimeImpl();
return m_fLastQueriedTime;
}
double ElapsedTime::getElapsedTimeImpl() const
{
if (m_bInHoldMode || m_bInPauseMode)
return m_fFrozenTime;
return getCurrentTime() - m_fStartTime;
}
void ElapsedTime::pauseTimer()
{
m_fFrozenTime = getElapsedTimeImpl();
m_bInPauseMode = true;
}
void ElapsedTime::continueTimer()
{
m_bInPauseMode = false;
// stop pausing, time runs again. Note that
// getElapsedTimeImpl() honors hold mode, i.e. a
// continueTimer() in hold mode will preserve the latter
const double fPauseDuration( getElapsedTimeImpl() - m_fFrozenTime );
// adjust start time, such that subsequent getElapsedTime() calls
// will virtually start from m_fFrozenTime.
m_fStartTime += fPauseDuration;
}
void ElapsedTime::holdTimer()
{
// when called during hold mode (e.g. more than once per time
// object), the original hold time will be maintained.
m_fFrozenTime = getElapsedTimeImpl();
m_bInHoldMode = true;
}
void ElapsedTime::releaseTimer()
{
m_bInHoldMode = false;
}
} // namespace tools
} // namespace canvas
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
|
