| 1 | /*********************************************************************** |
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| 2 | * Software License Agreement (BSD License) |
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| 3 | * |
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| 4 | * Copyright 2008-2009 Marius Muja (mariusm@cs.ubc.ca). All rights reserved. |
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| 5 | * Copyright 2008-2009 David G. Lowe (lowe@cs.ubc.ca). All rights reserved. |
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| 6 | * |
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| 7 | * THE BSD LICENSE |
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| 8 | * |
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| 9 | * Redistribution and use in source and binary forms, with or without |
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| 10 | * modification, are permitted provided that the following conditions |
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| 11 | * are met: |
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| 12 | * |
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| 13 | * 1. Redistributions of source code must retain the above copyright |
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| 14 | * notice, this list of conditions and the following disclaimer. |
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| 15 | * 2. Redistributions in binary form must reproduce the above copyright |
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| 16 | * notice, this list of conditions and the following disclaimer in the |
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| 17 | * documentation and/or other materials provided with the distribution. |
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| 18 | * |
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| 19 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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| 20 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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| 21 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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| 22 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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| 23 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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| 24 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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| 25 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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| 26 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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| 27 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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| 28 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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| 29 | *************************************************************************/ |
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| 30 | |
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| 31 | #ifndef FLANN_TIMER_H |
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| 32 | #define FLANN_TIMER_H |
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| 33 | |
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| 34 | #include <time.h> |
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| 35 | |
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| 36 | |
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| 37 | namespace flann |
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| 38 | { |
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| 39 | |
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| 40 | /** |
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| 41 | * A start-stop timer class. |
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| 42 | * |
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| 43 | * Can be used to time portions of code. |
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| 44 | */ |
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| 45 | class StartStopTimer |
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| 46 | { |
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| 47 | clock_t startTime; |
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| 48 | |
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| 49 | public: |
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| 50 | /** |
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| 51 | * Value of the timer. |
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| 52 | */ |
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| 53 | double value; |
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| 54 | |
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| 55 | |
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| 56 | /** |
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| 57 | * Constructor. |
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| 58 | */ |
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| 59 | StartStopTimer() |
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| 60 | { |
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| 61 | reset(); |
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| 62 | } |
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| 63 | |
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| 64 | /** |
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| 65 | * Starts the timer. |
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| 66 | */ |
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| 67 | void start() |
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| 68 | { |
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| 69 | startTime = clock(); |
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| 70 | } |
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| 71 | |
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| 72 | /** |
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| 73 | * Stops the timer and updates timer value. |
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| 74 | */ |
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| 75 | void stop() |
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| 76 | { |
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| 77 | clock_t stopTime = clock(); |
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| 78 | value += ( (double)stopTime - startTime) / CLOCKS_PER_SEC; |
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| 79 | } |
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| 80 | |
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| 81 | /** |
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| 82 | * Resets the timer value to 0. |
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| 83 | */ |
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| 84 | void reset() |
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| 85 | { |
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| 86 | value = 0; |
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| 87 | } |
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| 88 | |
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| 89 | }; |
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| 90 | |
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| 91 | } |
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| 92 | |
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| 93 | #endif // FLANN_TIMER_H |
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