77 lines
1.5 KiB
C++
77 lines
1.5 KiB
C++
#include <nana/system/timepiece.hpp>
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#include <nana/config.hpp>
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#ifdef NANA_WINDOWS
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#include <windows.h>
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#elif defined(NANA_POSIX)
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#include <sys/time.h>
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#endif
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namespace nana
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{
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namespace system
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{
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//class timepiece
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struct timepiece::impl_t
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{
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#if defined(NANA_WINDOWS)
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LARGE_INTEGER beg_timestamp;
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#elif defined(NANA_POSIX)
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struct timeval beg_timestamp;
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#endif
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};
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timepiece::timepiece()
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: impl_(new impl_t)
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{}
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timepiece::timepiece(const timepiece& rhs)
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: impl_(new impl_t(*rhs.impl_))
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{}
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timepiece::~timepiece()
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{
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delete impl_;
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}
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timepiece & timepiece::operator=(const timepiece & rhs)
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{
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if(this != &rhs)
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*impl_ = *rhs.impl_;
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return *this;
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}
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void timepiece::start() noexcept
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{
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#if defined(NANA_WINDOWS)
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::QueryPerformanceCounter(&impl_->beg_timestamp);
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#elif defined(NANA_POSIX)
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struct timezone tz;
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::gettimeofday(&impl_->beg_timestamp, &tz);
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#endif
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}
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double timepiece::calc() const noexcept
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{
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#if defined(NANA_WINDOWS)
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LARGE_INTEGER li;
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::QueryPerformanceCounter(&li);
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__int64 diff = li.QuadPart - impl_->beg_timestamp.QuadPart;
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LARGE_INTEGER freq;
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::QueryPerformanceFrequency(&freq);
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return double(diff)/double(freq.QuadPart) * 1000;
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#elif defined(NANA_POSIX)
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struct timeval tv;
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struct timezone tz;
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gettimeofday(&tv, &tz);
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return static_cast<double>(tv.tv_sec - impl_->beg_timestamp.tv_sec) * 1000 + static_cast<double>(tv.tv_usec - impl_->beg_timestamp.tv_usec) / 1000;
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#endif
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}
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//end class timepiece
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}//end namespace system
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}//end namespace nana
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