| 1 | /*************************************************************************** |
|---|
| 2 | * blitz/Timer.h Timer class, for use in benchmarking |
|---|
| 3 | * |
|---|
| 4 | * $Id: timer.h,v 1.4 2005/10/10 22:35:30 julianc Exp $ |
|---|
| 5 | * |
|---|
| 6 | * Copyright (C) 1997-2001 Todd Veldhuizen <tveldhui@oonumerics.org> |
|---|
| 7 | * |
|---|
| 8 | * This program is free software; you can redistribute it and/or |
|---|
| 9 | * modify it under the terms of the GNU General Public License |
|---|
| 10 | * as published by the Free Software Foundation; either version 2 |
|---|
| 11 | * of the License, or (at your option) any later version. |
|---|
| 12 | * |
|---|
| 13 | * This program is distributed in the hope that it will be useful, |
|---|
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
|---|
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
|---|
| 16 | * GNU General Public License for more details. |
|---|
| 17 | * |
|---|
| 18 | * Suggestions: blitz-dev@oonumerics.org |
|---|
| 19 | * Bugs: blitz-bugs@oonumerics.org |
|---|
| 20 | * |
|---|
| 21 | * For more information, please see the Blitz++ Home Page: |
|---|
| 22 | * http://oonumerics.org/blitz/ |
|---|
| 23 | * |
|---|
| 24 | ***************************************************************************/ |
|---|
| 25 | |
|---|
| 26 | // This class is not portable to non System V platforms. |
|---|
| 27 | // It will need to be rewritten for Windows, NT, Mac. |
|---|
| 28 | // NEEDS_WORK |
|---|
| 29 | |
|---|
| 30 | #ifndef BZ_TIMER_H |
|---|
| 31 | #define BZ_TIMER_H |
|---|
| 32 | |
|---|
| 33 | #ifndef BZ_BLITZ_H |
|---|
| 34 | #include <blitz/blitz.h> |
|---|
| 35 | #endif |
|---|
| 36 | |
|---|
| 37 | #ifdef BZ_HAVE_RUSAGE |
|---|
| 38 | #include <sys/resource.h> |
|---|
| 39 | #else |
|---|
| 40 | #include <time.h> |
|---|
| 41 | #endif |
|---|
| 42 | |
|---|
| 43 | BZ_NAMESPACE(blitz) |
|---|
| 44 | |
|---|
| 45 | class Timer { |
|---|
| 46 | |
|---|
| 47 | public: |
|---|
| 48 | Timer() |
|---|
| 49 | { |
|---|
| 50 | state_ = uninitialized; |
|---|
| 51 | } |
|---|
| 52 | |
|---|
| 53 | void start() |
|---|
| 54 | { |
|---|
| 55 | state_ = running; |
|---|
| 56 | t1_ = systemTime(); |
|---|
| 57 | } |
|---|
| 58 | |
|---|
| 59 | void stop() |
|---|
| 60 | { |
|---|
| 61 | t2_ = systemTime(); |
|---|
| 62 | BZPRECONDITION(state_ == running); |
|---|
| 63 | state_ = stopped; |
|---|
| 64 | } |
|---|
| 65 | |
|---|
| 66 | /* Compaq cxx compiler in ansi mode cannot print out long double type! */ |
|---|
| 67 | #if defined(__DECCXX) |
|---|
| 68 | double elapsedSeconds() |
|---|
| 69 | #else |
|---|
| 70 | long double elapsedSeconds() |
|---|
| 71 | #endif |
|---|
| 72 | { |
|---|
| 73 | BZPRECONDITION(state_ == stopped); |
|---|
| 74 | return t2_ - t1_; |
|---|
| 75 | } |
|---|
| 76 | |
|---|
| 77 | private: |
|---|
| 78 | Timer(Timer&) { } |
|---|
| 79 | void operator=(Timer&) { } |
|---|
| 80 | |
|---|
| 81 | long double systemTime() |
|---|
| 82 | { |
|---|
| 83 | #ifdef BZ_HAVE_RUSAGE |
|---|
| 84 | getrusage(RUSAGE_SELF, &resourceUsage_); |
|---|
| 85 | double seconds = resourceUsage_.ru_utime.tv_sec |
|---|
| 86 | + resourceUsage_.ru_stime.tv_sec; |
|---|
| 87 | double micros = resourceUsage_.ru_utime.tv_usec |
|---|
| 88 | + resourceUsage_.ru_stime.tv_usec; |
|---|
| 89 | return seconds + micros/1.0e6; |
|---|
| 90 | #else |
|---|
| 91 | return clock() / (long double) CLOCKS_PER_SEC; |
|---|
| 92 | #endif |
|---|
| 93 | } |
|---|
| 94 | |
|---|
| 95 | enum { uninitialized, running, stopped } state_; |
|---|
| 96 | |
|---|
| 97 | #ifdef BZ_HAVE_RUSAGE |
|---|
| 98 | struct rusage resourceUsage_; |
|---|
| 99 | #endif |
|---|
| 100 | |
|---|
| 101 | long double t1_, t2_; |
|---|
| 102 | }; |
|---|
| 103 | |
|---|
| 104 | BZ_NAMESPACE_END |
|---|
| 105 | |
|---|
| 106 | #endif // BZ_TIMER_H |
|---|
| 107 | |
|---|
