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esp_attr: add flag_attr to support enums used as flags

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Michael (XIAO Xufeng)
2019-08-08 17:49:12 +08:00
parent 264ffbeb14
commit d850a0bd1c
3 changed files with 53 additions and 1 deletions
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24
components/esp32/include/esp_attr.h
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@@ -76,6 +76,30 @@
// Forces to not inline function
#define NOINLINE_ATTR __attribute__((noinline))
// This allows using enum as flags in C++
// Format: FLAG_ATTR(flag_enum_t)
#ifdef __cplusplus
#define FLAG_ATTR_IMPL(TYPE, INT_TYPE) \
constexpr TYPE operator~ (TYPE a) { return (TYPE)~(INT_TYPE)a; } \
constexpr TYPE operator| (TYPE a, TYPE b) { return (TYPE)((INT_TYPE)a | (INT_TYPE)b); } \
constexpr TYPE operator& (TYPE a, TYPE b) { return (TYPE)((INT_TYPE)a & (INT_TYPE)b); } \
constexpr TYPE operator^ (TYPE a, TYPE b) { return (TYPE)((INT_TYPE)a ^ (INT_TYPE)b); } \
constexpr TYPE operator>> (TYPE a, int b) { return (TYPE)((INT_TYPE)a >> b); } \
constexpr TYPE operator<< (TYPE a, int b) { return (TYPE)((INT_TYPE)a << b); } \
TYPE& operator|=(TYPE& a, TYPE b) { a = a | b; return a; } \
TYPE& operator&=(TYPE& a, TYPE b) { a = a & b; return a; } \
TYPE& operator^=(TYPE& a, TYPE b) { a = a ^ b; return a; } \
TYPE& operator>>=(TYPE& a, int b) { a >>= b; return a; } \
TYPE& operator<<=(TYPE& a, int b) { a <<= b; return a; }
#define FLAG_ATTR_U32(TYPE) FLAG_ATTR_IMPL(TYPE, uint32_t)
#define FLAG_ATTR FLAG_ATTR_U32
#else
#define FLAG_ATTR(TYPE)
#endif
// Implementation for a unique custom section
//
// This prevents gcc producing "x causes a section type conflict with y"