Index: trunk/src/time.cc
===================================================================
--- trunk/src/time.cc	(revision 34)
+++ trunk/src/time.cc	(revision 34)
@@ -0,0 +1,103 @@
+// Copyright (C) 2011 Kornel Kisielewicz
+// This file is part of NV Libraries.
+// For conditions of distribution and use, see copyright notice in nv.hh
+
+#include "nv/time.hh"
+
+#include "nv/logging.hh"
+
+#if NV_COMPILER == NV_MSVC
+#define WIN32_LEAN_AND_MEAN 
+#include <windows.h>
+#include <intrin.h>
+#pragma intrinsic(__rdtsc)
+#else
+#include <unistd.h>
+#include <sys/time.h>
+#endif
+
+#include <ctime>
+
+struct timer_impl
+{
+	timer_impl()
+	{
+		clock_zero = clock();
+#if NV_COMPILER == NV_MSVC
+		QueryPerformanceFrequency(&frequency);
+		QueryPerformanceCounter(&query_zero);
+#else
+		gettimeofday(&timeval_zero, NULL);
+#endif
+	}
+	clock_t clock_zero;
+#if NV_COMPILER == NV_MSVC
+	LARGE_INTEGER query_zero;
+	LARGE_INTEGER frequency;
+#else
+	struct timeval timeval_zero;
+#endif
+};
+
+static timer_impl zero_timer;
+
+volatile nv::uint64 nv::get_ticks()
+{
+#if NV_COMPILER == NV_MSVC
+	return __rdtsc();
+#elif NV_COMPILER == NV_GNUC
+	register long long ticks asm("eax");
+	asm volatile (".byte 15, 49" : : : "eax", "edx");
+	return ticks;
+#else
+	return 0; // unsupported
+#endif
+}
+
+void nv::sleep( uint32 ms )
+{
+#if NV_COMPILER == NV_MSVC
+	Sleep( ms );
+#elif NV_COMPILER == NV_GNUC
+	usleep( ms * 1000 );
+#else
+#endif
+}
+
+nv::uint32 nv::get_cpu_ms()
+{
+	return (uint32)( (f32)( clock() - zero_timer.clock_zero ) / ( (f32)CLOCKS_PER_SEC / 1000.0 ) ) ;
+}
+
+nv::uint32 nv::get_cpu_us()
+{
+	return (uint32)( (f32)( clock() - zero_timer.clock_zero ) / ( (f32)CLOCKS_PER_SEC / 1000000.0 ) ) ;
+}
+
+nv::uint32 nv::get_system_ms()
+{
+#if NV_COMPILER == NV_MSVC
+	LARGE_INTEGER now;
+	QueryPerformanceCounter(&now);
+	LONGLONG result = now.QuadPart - zero_timer.query_zero.QuadPart;
+	return (uint32) (1000.0 * result / zero_timer.frequency.QuadPart);
+#else
+	struct timeval now;
+	gettimeofday(&now, NULL);
+	return (now.tv_sec - zero_timer.timeval_zero.tv_sec)*1000+(now.tv_usec-zero_timer.timeval_zero.tv_usec)/1000;
+#endif
+}
+
+nv::uint32 nv::get_system_us()
+{
+#if NV_COMPILER == NV_MSVC
+	LARGE_INTEGER now;
+	QueryPerformanceCounter(&now);
+	LONGLONG result = now.QuadPart - zero_timer.query_zero.QuadPart;
+	return (uint32) (1000000.0 * result / zero_timer.frequency.QuadPart);
+#else
+	struct timeval now;
+	gettimeofday(&now, NULL);
+	return (now.tv_sec - zero_timer.timeval_zero.tv_sec)*1000000+(now.tv_usec - zero_timer.timeval_zero.tv_usec);
+#endif
+}