Marvin,
So lucky to have you in the edk2 project looking into these fundamentals!
+ #define ALIGNOF(TYPE) OFFSET_OF (struct { CHAR8 C; TYPE A; }, A)
1. Does struct{} inside a macro conform to C standard? How is the compatibility
with different compilers?
+#define IS_POW2(Value) ((Value) != 0U && ((Value) & ((Value) - 1U)) ==
+0U)
2. Good to me. I learned this trick when implementing the MtrrLib.
+#define ALIGN_VALUE_ADDEND(Value, Alignment) (((Alignment) - (Value))
+& ((Alignment) - 1U))
3. Is any other open source project using the same macro for the addend?
This is actually a general question to all new macros.
I would like the macros look familiar to developers from other open source
projects.
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