2011-12-27 21:18:07 +00:00
commit 9f98ea7e22
192 changed files with 77747 additions and 0 deletions
@@ -0,0 +1,119 @@
+// File: crn_win32_timer.cpp
+// See Copyright Notice and license at the end of inc/crnlib.h
+#include "crn_core.h"
+#include "crn_win32_timer.h"
+#include "crn_winhdr.h"
+
+namespace crnlib
+{
+   uint64 timer::g_init_ticks;
+   uint64 timer::g_freq;
+   double timer::g_inv_freq;
+
+   timer::timer() :
+      m_start_time(0),
+      m_stop_time(0),
+      m_started(false),
+      m_stopped(false)
+   {
+      if (!g_inv_freq) init();
+   }
+   
+   timer::timer(timer_ticks start_ticks)
+   {
+      if (!g_inv_freq) init();
+      
+      m_start_time = start_ticks;
+      
+      m_started = true;
+      m_stopped = false;
+   }
+   
+   void timer::start(timer_ticks start_ticks)
+   {
+      m_start_time = start_ticks;
+      
+      m_started = true;
+      m_stopped = false;
+   }
+
+   void timer::start()
+   {
+      QueryPerformanceCounter((LARGE_INTEGER*)&m_start_time);
+      
+      m_started = true;
+      m_stopped = false;
+   }
+   
+   void timer::stop()
+   {
+      CRNLIB_ASSERT(m_started);
+                  
+      QueryPerformanceCounter((LARGE_INTEGER*)&m_stop_time);
+      
+      m_stopped = true;
+   }
+
+   double timer::get_elapsed_secs() const
+   {
+      CRNLIB_ASSERT(m_started);
+      if (!m_started)
+         return 0;
+      
+      uint64 stop_time = m_stop_time;
+      if (!m_stopped)
+         QueryPerformanceCounter((LARGE_INTEGER*)&stop_time);
+         
+      uint64 delta = stop_time - m_start_time;
+      return delta * g_inv_freq;
+   }
+   
+   uint64 timer::get_elapsed_us() const
+   {
+      CRNLIB_ASSERT(m_started);
+      if (!m_started)
+         return 0;
+         
+      uint64 stop_time = m_stop_time;
+      if (!m_stopped)
+         QueryPerformanceCounter((LARGE_INTEGER*)&stop_time);
+      
+      uint64 delta = stop_time - m_start_time;
+      return (delta * 1000000ULL + (g_freq >> 1U)) / g_freq;      
+   }
+   
+   void timer::init()
+   {
+      if (!g_inv_freq)
+      {
+         QueryPerformanceFrequency((LARGE_INTEGER*)&g_freq);
+         g_inv_freq = 1.0f / g_freq;
+         
+         QueryPerformanceCounter((LARGE_INTEGER*)&g_init_ticks);
+      }
+   }
+   
+   timer_ticks timer::get_init_ticks()
+   {
+      if (!g_inv_freq) init();
+      
+      return g_init_ticks;
+   }
+   
+   timer_ticks timer::get_ticks()
+   {
+      if (!g_inv_freq) init();
+      
+      timer_ticks ticks;
+      QueryPerformanceCounter((LARGE_INTEGER*)&ticks);
+      return ticks;
+   }
+   
+   double timer::ticks_to_secs(timer_ticks ticks)
+   {
+      if (!g_inv_freq) init();
+      
+      return ticks * g_inv_freq;
+   }
+
+} // namespace crnlib