git-svn-id: https://casparcg.svn.sourceforge.net/svnroot/casparcg/server/branches...

diff --git a/common/common.vcxproj b/common/common.vcxproj
index 1c48447dfd3942077713166a648d91a089a27d9d..c183cef41db252999f9d895f58a9b5c1f9a8a918 100644 (file)
--- a/common/common.vcxproj
+++ b/common/common.vcxproj
@@ -222,6 +222,7 @@
     <ClInclude Include="utility\assert.h" />\r
     <ClInclude Include="utility\printer.h" />\r
     <ClInclude Include="utility\string.h" />\r
+    <ClInclude Include="utility\timer.h" />\r
   </ItemGroup>\r
   <ItemGroup>\r
     <ClCompile Include="diagnostics\graph.cpp">\r

diff --git a/common/common.vcxproj.filters b/common/common.vcxproj.filters
index 696f82a3c6a3f7c87569b84ea600b693f1922e0c..0504c22f9d727ca4b99bbd074f7eeabadd09914d 100644 (file)
--- a/common/common.vcxproj.filters
+++ b/common/common.vcxproj.filters
@@ -81,5 +81,8 @@
     <ClInclude Include="utility\string.h">\r
       <Filter>utility</Filter>\r
     </ClInclude>\r
+    <ClInclude Include="utility\timer.h">\r
+      <Filter>utility</Filter>\r
+    </ClInclude>\r
   </ItemGroup>\r
 </Project>
\ No newline at end of file

diff --git a/common/utility/timer.h b/common/utility/timer.h
new file mode 100644 (file)
index 0000000..6d5a15d
--- /dev/null
+++ b/common/utility/timer.h
@@ -0,0 +1,77 @@
+#pragma once\r
+\r
+#include <windows.h>\r
+\r
+namespace caspar {\r
+       \r
+class timer\r
+{\r
+public:\r
+       timer()\r
+       {\r
+               QueryPerformanceFrequency(&freq_);\r
+               QueryPerformanceCounter(&time_);\r
+       }\r
+\r
+       double elapsed()\r
+       {\r
+               LARGE_INTEGER t;\r
+               QueryPerformanceCounter(&t);\r
+               int ticks_passed = static_cast<int>(static_cast<__int64>(t.QuadPart) - static_cast<__int64>(time_.QuadPart));\r
+               return static_cast<double>(ticks_passed)/static_cast<double>(freq_.QuadPart);\r
+       }\r
+       \r
+       void reset()\r
+       {\r
+               QueryPerformanceCounter(&time_);\r
+       }\r
+\r
+       // Author: Ryan M. Geiss\r
+       // http://www.geisswerks.com/ryan/FAQS/timing.html\r
+       void tick(double interval)\r
+       {       \r
+               LARGE_INTEGER t;\r
+               QueryPerformanceCounter(&t);\r
+\r
+               if (time_.QuadPart != 0)\r
+               {\r
+                       int ticks_to_wait = static_cast<int>(static_cast<double>(freq_.QuadPart) * interval);\r
+                       int done = 0;\r
+                       do\r
+                       {\r
+                               QueryPerformanceCounter(&t);\r
+                               \r
+                               int ticks_passed = static_cast<int>(static_cast<__int64>(t.QuadPart) - static_cast<__int64>(time_.QuadPart));\r
+                               int ticks_left = ticks_to_wait - ticks_passed;\r
+\r
+                               if (t.QuadPart < time_.QuadPart)    // time wrap\r
+                                       done = 1;\r
+                               if (ticks_passed >= ticks_to_wait)\r
+                                       done = 1;\r
+                               \r
+                               if (!done)\r
+                               {\r
+                                       // if > 0.002s left, do Sleep(1), which will actually sleep some \r
+                                       //   steady amount, probably 1-2 ms,\r
+                                       //   and do so in a nice way (cpu meter drops; laptop battery spared).\r
+                                       // otherwise, do a few Sleep(0)'s, which just give up the timeslice,\r
+                                       //   but don't really save cpu or battery, but do pass a tiny\r
+                                       //   amount of time.\r
+                                       if (ticks_left > static_cast<int>((freq_.QuadPart*2)/1000))\r
+                                               Sleep(1);\r
+                                       else                        \r
+                                               for (int i = 0; i < 10; ++i) \r
+                                                       Sleep(0);  // causes thread to give up its timeslice\r
+                               }\r
+                       }\r
+                       while (!done);            \r
+               }\r
+\r
+               time_ = t;\r
+       }               \r
+private:       \r
+       LARGE_INTEGER freq_;\r
+       LARGE_INTEGER time_;\r
+};\r
+\r
+}
\ No newline at end of file