Remove global IO context and integrate it into the RS context.
diff --git a/rsContext.h b/rsContext.h
index 60a526b..3d17298 100644
--- a/rsContext.h
+++ b/rsContext.h
@@ -21,6 +21,7 @@
 
 #include <ui/Surface.h>
 
+#include "rsThreadIO.h"
 #include "rsType.h"
 #include "rsMatrix.h"
 #include "rsAllocation.h"
@@ -115,6 +116,9 @@
     uint32_t getWidth() const {return mWidth;}
     uint32_t getHeight() const {return mHeight;}
 
+
+    ThreadIO mIO;
+
 protected:
     Device *mDev;