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GetTime.cpp
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1 /*
2 * Original work: Copyright (c) 2014, Oculus VR, Inc.
3 * All rights reserved.
4 *
5 * This source code is licensed under the BSD-style license found in the
6 * RakNet License.txt file in the licenses directory of this source tree. An additional grant
7 * of patent rights can be found in the RakNet Patents.txt file in the same directory.
8 *
9 *
10 * Modified work: Copyright (c) 2016-2017, SLikeSoft UG (haftungsbeschränkt)
11 *
12 * This source code was modified by SLikeSoft. Modifications are licensed under the MIT-style
13 * license found in the license.txt file in the root directory of this source tree.
14 */
15
18
19
20 #if defined(_WIN32)
21 #include "slikenet/WindowsIncludes.h"
22
23 #if !defined(WINDOWS_PHONE_8)
24 // To call timeGetTime
25 // on Code::Blocks, this needs to be libwinmm.a instead
26 #pragma comment(lib, "Winmm.lib")
27 #endif
28
29 #endif
30
31 #include "slikenet/GetTime.h"
32
33
34
35
36 #if defined(_WIN32)
37 //DWORD mProcMask;
38 //DWORD mSysMask;
39 //HANDLE mThread;
40
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43
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46
47
48
49 #else
50 #include <sys/time.h>
51 #include <unistd.h>
52 SLNet::TimeUS initialTime;
53 #endif
54
55 static bool initialized=false;
56
57 #if defined(GET_TIME_SPIKE_LIMIT) && GET_TIME_SPIKE_LIMIT>0
58 #include "slikenet/SimpleMutex.h"
59 SLNet::TimeUS lastNormalizedReturnedValue=0;
60 SLNet::TimeUS lastNormalizedInputValue=0;
64 SLNet::TimeUS NormalizeTime(SLNet::TimeUS timeIn)
65 {
66 SLNet::TimeUS diff, lastNormalizedReturnedValueCopy;
67 static SLNet::SimpleMutex mutex;
68
69 mutex.Lock();
70 if (timeIn>=lastNormalizedInputValue)
71 {
72 diff = timeIn-lastNormalizedInputValue;
73 if (diff > GET_TIME_SPIKE_LIMIT)
74 lastNormalizedReturnedValue+=GET_TIME_SPIKE_LIMIT;
75 else
76 lastNormalizedReturnedValue+=diff;
77 }
78 else
79 lastNormalizedReturnedValue+=GET_TIME_SPIKE_LIMIT;
80
81 lastNormalizedInputValue=timeIn;
82 lastNormalizedReturnedValueCopy=lastNormalizedReturnedValue;
83 mutex.Unlock();
84
85 return lastNormalizedReturnedValueCopy;
86 }
87 #endif // #if defined(GET_TIME_SPIKE_LIMIT) && GET_TIME_SPIKE_LIMIT>0
88 SLNet::Time SLNet::GetTime( void )
89 {
90 return (SLNet::Time)(GetTimeUS()/1000);
91 }
92 SLNet::TimeMS SLNet::GetTimeMS( void )
93 {
94 return (SLNet::TimeMS)(GetTimeUS()/1000);
95 }
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144 #if defined(_WIN32)
145 SLNet::TimeUS GetTimeUS_Windows( void )
146 {
147 if ( initialized == false)
148 {
149 initialized = true;
150
151 // Save the current process
152 #if !defined(_WIN32_WCE)
153 // HANDLE mProc = GetCurrentProcess();
154
155 // Get the current Affinity
156 #if defined (_M_X64)
157 // GetProcessAffinityMask(mProc, (PDWORD_PTR)&mProcMask, (PDWORD_PTR)&mSysMask);
158 #else
159 // GetProcessAffinityMask(mProc, &mProcMask, &mSysMask);
160 #endif
161 // mThread = GetCurrentThread();
162
163 #endif // _WIN32_WCE
164 }
165
166 // 9/26/2010 In China running LuDaShi, QueryPerformanceFrequency has to be called every time because CPU clock speeds can be different
167 SLNet::TimeUS curTime;
168 LARGE_INTEGER PerfVal;
169 LARGE_INTEGER yo1;
170
171 QueryPerformanceFrequency( &yo1 );
172 QueryPerformanceCounter( &PerfVal );
173
174 __int64 quotient, remainder;
175 quotient=((PerfVal.QuadPart) / yo1.QuadPart);
176 remainder=((PerfVal.QuadPart) % yo1.QuadPart);
177 curTime = (SLNet::TimeUS) quotient*(SLNet::TimeUS)1000000 + (remainder*(SLNet::TimeUS)1000000 / yo1.QuadPart);
178
179 #if defined(GET_TIME_SPIKE_LIMIT) && GET_TIME_SPIKE_LIMIT>0
180 return NormalizeTime(curTime);
181 #else
182 return curTime;
183 #endif // #if defined(GET_TIME_SPIKE_LIMIT) && GET_TIME_SPIKE_LIMIT>0
184 }
185 #elif defined(__GNUC__) || defined(__GCCXML__) || defined(__S3E__)
186 SLNet::TimeUS GetTimeUS_Linux( void )
187 {
188 timeval tp;
189 if ( initialized == false)
190 {
191 gettimeofday( &tp, 0 );
192 initialized=true;
193 // I do this because otherwise SLNet::Time in milliseconds won't work as it will underflow when dividing by 1000 to do the conversion
194 initialTime = ( tp.tv_sec ) * (SLNet::TimeUS) 1000000 + ( tp.tv_usec );
195 }
196
197 // GCC
198 SLNet::TimeUS curTime;
199 gettimeofday( &tp, 0 );
200
201 curTime = ( tp.tv_sec ) * (SLNet::TimeUS) 1000000 + ( tp.tv_usec );
202
203 #if defined(GET_TIME_SPIKE_LIMIT) && GET_TIME_SPIKE_LIMIT>0
204 return NormalizeTime(curTime - initialTime);
205 #else
206 return curTime - initialTime;
207 #endif // #if defined(GET_TIME_SPIKE_LIMIT) && GET_TIME_SPIKE_LIMIT>0
208 }
209 #endif
210
211 SLNet::TimeUS SLNet::GetTimeUS( void )
212 {
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218
219 #if defined(_WIN32)
220 return GetTimeUS_Windows();
221 #else
222 return GetTimeUS_Linux();
223 #endif
224 }
225 bool SLNet::GreaterThan(SLNet::Time a, SLNet::Time b)
226 {
227 // a > b?
228 const SLNet::Time halfSpan =(SLNet::Time) (((SLNet::Time)(const SLNet::Time)-1)/(SLNet::Time)2);
229 return b!=a && b-a>halfSpan;
230 }
231 bool SLNet::LessThan(SLNet::Time a, SLNet::Time b)
232 {
233 // a < b?
234 const SLNet::Time halfSpan = ((SLNet::Time)(const SLNet::Time)-1)/(SLNet::Time)2;
235 return b!=a && b-a<halfSpan;
236 }