Cache size of char

BlittableValueType<char> caches the size of the type parameter. This
way, we avoid calling Marshal.SizeOf repeatedly for every keyboard
event.

diff --git a/Source/OpenTK/Platform/MacOS/CarbonBindings/CarbonAPI.cs b/Source/OpenTK/Platform/MacOS/CarbonBindings/CarbonAPI.cs
index be079f9..83c41a4 100644 (file)
--- a/Source/OpenTK/Platform/MacOS/CarbonBindings/CarbonAPI.cs
+++ b/Source/OpenTK/Platform/MacOS/CarbonBindings/CarbonAPI.cs
@@ -684,9 +684,9 @@ namespace OpenTK.Platform.MacOS.Carbon
                 char* codeAddr = &code;
 
                 OSStatus result = API.GetEventParameter(inEvent,
-                     EventParamName.KeyMacCharCode, EventParamType.typeChar, IntPtr.Zero,
-                     (uint)System.Runtime.InteropServices.Marshal.SizeOf(typeof(char)), IntPtr.Zero,
-                     (IntPtr)codeAddr);
+                    EventParamName.KeyMacCharCode, EventParamType.typeChar, IntPtr.Zero,
+                    (uint)BlittableValueType<char>.Stride, IntPtr.Zero,
+                    (IntPtr)codeAddr);
 
                 if (result != OSStatus.NoError)
                 {