tick_count.h Source File

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# tick_count.h

    00001 /*
    00002     Copyright 2005-2012 Intel Corporation.  All Rights Reserved.
    00003
    00004     The source code contained or described herein and all documents related
    00005     to the source code ("Material") are owned by Intel Corporation or its
    00006     suppliers or licensors.  Title to the Material remains with Intel
    00007     Corporation or its suppliers and licensors.  The Material is protected
    00008     by worldwide copyright laws and treaty provisions.  No part of the
    00009     Material may be used, copied, reproduced, modified, published, uploaded,
    00010     posted, transmitted, distributed, or disclosed in any way without
    00011     Intel's prior express written permission.
    00012
    00013     No license under any patent, copyright, trade secret or other
    00014     intellectual property right is granted to or conferred upon you by
    00015     disclosure or delivery of the Materials, either expressly, by
    00016     implication, inducement, estoppel or otherwise.  Any license under such
    00017     intellectual property rights must be express and approved by Intel in
    00018     writing.
    00019 */
    00020
    00021 #ifndef __TBB_tick_count_H
    00022 #define __TBB_tick_count_H
    00023
    00024 #include "tbb_stddef.h"
    00025
    00026 #if _WIN32||_WIN64
    00027 #include "machine/windows_api.h"
    00028 #elif __linux__
    00029 #include <ctime>
    00030 #else /* generic Unix */
    00031 #include <sys/time.h>
    00032 #endif /* (choice of OS) */
    00033
    00034 namespace tbb {
    00035
    00037
    00038 class tick_count {
    00039 public:
    00041     class interval_t {
    00042         long long value;
    00043         explicit interval_t( long long value_ ) : value(value_) {}
    00044     public:
    00046         interval_t() : value(0) {};
    00047
    00049         explicit interval_t( double sec );
    00050
    00052         double seconds() const;
    00053
    00054         friend class tbb::tick_count;
    00055
    00057         friend interval_t operator-( const tick_count& t1, const tick_count& t0 );
    00058
    00060         friend interval_t operator+( const interval_t& i, const interval_t& j ) {
    00061             return interval_t(i.value+j.value);
    00062         }
    00063
    00065         friend interval_t operator-( const interval_t& i, const interval_t& j ) {
    00066             return interval_t(i.value-j.value);
    00067         }
    00068
    00070         interval_t& operator+=( const interval_t& i ) {value += i.value; return *this;}
    00071
    00073         interval_t& operator-=( const interval_t& i ) {value -= i.value; return *this;}
    00074     };
    00075
    00077     tick_count() : my_count(0) {};
    00078
    00080     static tick_count now();
    00081
    00083     friend interval_t operator-( const tick_count& t1, const tick_count& t0 );
    00084
    00085 private:
    00086     long long my_count;
    00087 };
    00088
    00089 inline tick_count tick_count::now() {
    00090     tick_count result;
    00091 #if _WIN32||_WIN64
    00092     LARGE_INTEGER qpcnt;
    00093     QueryPerformanceCounter(&qpcnt);
    00094     result.my_count = qpcnt.QuadPart;
    00095 #elif __linux__
    00096     struct timespec ts;
    00097 #if TBB_USE_ASSERT
    00098     int status =
    00099 #endif /* TBB_USE_ASSERT */
    00100         clock_gettime( CLOCK_REALTIME, &ts );
    00101     __TBB_ASSERT( status==0, "CLOCK_REALTIME not supported" );
    00102     result.my_count = static_cast<long long>(1000000000UL)*static_cast<long long>(ts.tv_sec) + static_cast<long long>(ts.tv_nsec);
    00103 #else /* generic Unix */
    00104     struct timeval tv;
    00105 #if TBB_USE_ASSERT
    00106     int status =
    00107 #endif /* TBB_USE_ASSERT */
    00108         gettimeofday(&tv, NULL);
    00109     __TBB_ASSERT( status==0, "gettimeofday failed" );
    00110     result.my_count = static_cast<long long>(1000000)*static_cast<long long>(tv.tv_sec) + static_cast<long long>(tv.tv_usec);
    00111 #endif /*(choice of OS) */
    00112     return result;
    00113 }
    00114
    00115 inline tick_count::interval_t::interval_t( double sec )
    00116 {
    00117 #if _WIN32||_WIN64
    00118     LARGE_INTEGER qpfreq;
    00119     QueryPerformanceFrequency(&qpfreq);
    00120     value = static_cast<long long>(sec*qpfreq.QuadPart);
    00121 #elif __linux__
    00122     value = static_cast<long long>(sec*1E9);
    00123 #else /* generic Unix */
    00124     value = static_cast<long long>(sec*1E6);
    00125 #endif /* (choice of OS) */
    00126 }
    00127
    00128 inline tick_count::interval_t operator-( const tick_count& t1, const tick_count& t0 ) {
    00129     return tick_count::interval_t( t1.my_count-t0.my_count );
    00130 }
    00131
    00132 inline double tick_count::interval_t::seconds() const {
    00133 #if _WIN32||_WIN64
    00134     LARGE_INTEGER qpfreq;
    00135     QueryPerformanceFrequency(&qpfreq);
    00136     return value/(double)qpfreq.QuadPart;
    00137 #elif __linux__
    00138     return value*1E-9;
    00139 #else /* generic Unix */
    00140     return value*1E-6;
    00141 #endif /* (choice of OS) */
    00142 }
    00143
    00144 } // namespace tbb
    00145
    00146 #endif /* __TBB_tick_count_H */
    00147

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