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| Rev | Author | Line No. | Line |
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| 4758 | right-hear | 1 | /* |
| 2 | * Copyright (c) 2005, Hervé Drolon, FreeImage Team |
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| 3 | * All rights reserved. |
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| 4 | * |
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| 5 | * Redistribution and use in source and binary forms, with or without |
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| 6 | * modification, are permitted provided that the following conditions |
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| 7 | * are met: |
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| 8 | * 1. Redistributions of source code must retain the above copyright |
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| 9 | * notice, this list of conditions and the following disclaimer. |
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| 10 | * 2. Redistributions in binary form must reproduce the above copyright |
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| 11 | * notice, this list of conditions and the following disclaimer in the |
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| 12 | * documentation and/or other materials provided with the distribution. |
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| 13 | * |
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| 14 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS `AS IS' |
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| 15 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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| 16 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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| 17 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE |
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| 18 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
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| 19 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
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| 20 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
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| 21 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
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| 22 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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| 23 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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| 24 | * POSSIBILITY OF SUCH DAMAGE. |
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| 25 | */ |
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| 26 | |||
| 27 | #ifdef _WIN32 |
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| 28 | #include |
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| 29 | #else |
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| 30 | #include |
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| 31 | #include |
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| 32 | #include |
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| 33 | #endif /* _WIN32 */ |
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| 34 | #include "opj_includes.h" |
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| 35 | |||
| 36 | double opj_clock(void) { |
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| 37 | #ifdef _WIN32 |
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| 38 | /* _WIN32: use QueryPerformance (very accurate) */ |
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| 39 | LARGE_INTEGER freq , t ; |
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| 40 | /* freq is the clock speed of the CPU */ |
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| 41 | QueryPerformanceFrequency(&freq) ; |
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| 42 | /* cout << "freq = " << ((double) freq.QuadPart) << endl; */ |
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| 43 | /* t is the high resolution performance counter (see MSDN) */ |
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| 44 | QueryPerformanceCounter ( & t ) ; |
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| 45 | return ( t.QuadPart /(double) freq.QuadPart ) ; |
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| 46 | #else |
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| 47 | /* Unix or Linux: use resource usage */ |
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| 48 | struct rusage t; |
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| 49 | double procTime; |
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| 50 | /* (1) Get the rusage data structure at this moment (man getrusage) */ |
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| 51 | getrusage(0,&t); |
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| 52 | /* (2) What is the elapsed time ? - CPU time = User time + System time */ |
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| 53 | /* (2a) Get the seconds */ |
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| 54 | procTime = t.ru_utime.tv_sec + t.ru_stime.tv_sec; |
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| 55 | /* (2b) More precisely! Get the microseconds part ! */ |
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| 56 | return ( procTime + (t.ru_utime.tv_usec + t.ru_stime.tv_usec) * 1e-6 ) ; |
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| 57 | #endif |
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| 58 | } |
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| 59 |