first init of 0.9

source/system/timepiece.cpp

@@ -0,0 +1,76 @@
+#include <nana/system/timepiece.hpp>
+#include <nana/config.hpp>
+#ifdef NANA_WINDOWS
+	#include <windows.h>
+#elif defined(NANA_LINUX)
+	#include <sys/time.h>
+#endif
+
+namespace nana
+{
+namespace system
+{
+	//class timepiece
+		struct timepiece::impl_t
+		{
+#if defined(NANA_WINDOWS)
+			LARGE_INTEGER beg_timestamp;
+#elif defined(NANA_LINUX)
+			struct timeval beg_timestamp;
+#endif
+		};
+
+		timepiece::timepiece()
+			: impl_(new impl_t)
+		{}
+
+		timepiece::timepiece(const volatile timepiece& rhs)
+			: impl_(new impl_t(*rhs.impl_))
+		{}
+
+		timepiece::~timepiece()
+		{
+			delete impl_;
+		}
+
+		timepiece & timepiece::operator=(const volatile timepiece & rhs)
+		{
+			if(this != &rhs)
+				*impl_ = *rhs.impl_;
+
+			return *this;
+		}
+
+		void timepiece::start() volatile
+		{
+#if defined(NANA_WINDOWS)
+			::QueryPerformanceCounter(&impl_->beg_timestamp);
+#elif defined(NANA_LINUX)
+			struct timezone tz;
+			::gettimeofday(&impl_->beg_timestamp, &tz);
+#endif
+		}
+
+		double timepiece::calc() const volatile
+		{
+#if defined(NANA_WINDOWS)
+			LARGE_INTEGER li;
+			::QueryPerformanceCounter(&li);
+
+			__int64 diff = li.QuadPart - impl_->beg_timestamp.QuadPart;
+
+			LARGE_INTEGER freq;
+			::QueryPerformanceFrequency(&freq);
+
+			return double(diff)/double(freq.QuadPart) * 1000;
+#elif defined(NANA_LINUX)
+			struct timeval tv;
+			struct timezone tz;
+			gettimeofday(&tv, &tz);
+			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;
+#endif
+		}
+	//end class timepiece
+
+}//end namespace system
+}//end namespace nana