Add mechanism to disable temporary compiler warnings in a sequence of code.

m-i-shared.h

@@ -28,6 +28,8 @@
 #include "m-core.h"
 #include "m-atomic.h"
 
+M_BEGIN_PROTECTED_CODE
+
 /* Define the oplist of a intrusive shared pointer.
    USAGE: ISHARED_OPLIST(name [, oplist_of_the_type]) */
 #define ISHARED_PTR_OPLIST(...)                                      \
@@ -169,5 +171,7 @@
   }									\
                                                                         \
 
+M_END_PROTECTED_CODE
+
 #endif