common.h File Reference

Common toolchain abstraction. More...

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Macros
#define	EXTERN_C   extern
#define	ZRESTRICT   restrict
#define	REQUIRES(sym)
#define	ALWAYS_INLINE   inline __attribute__((always_inline))
#define	STRINGIFY(s)
#define	IS_PTR_ALIGNED_BYTES(ptr, bytes)
#define	IS_PTR_ALIGNED(ptr, type)
#define	LINKER_KEEP(symbol)
	Tag a symbol (e.g.

Detailed Description

Common toolchain abstraction.

Macros to abstract compiler capabilities (common to all toolchains).

Macro Definition Documentation

ALWAYS_INLINE

#define ALWAYS_INLINE   inline __attribute__((always_inline))

EXTERN_C

#define EXTERN_C   extern

IS_PTR_ALIGNED

#define IS_PTR_ALIGNED	(		ptr,
			type )

Value:

IS_PTR_ALIGNED_BYTES(ptr, __alignof(type))

IS_PTR_ALIGNED_BYTES

#define IS_PTR_ALIGNED_BYTES	(		ptr,
			bytes )

Value:

((((uintptr_t)ptr) % bytes) == 0)

LINKER_KEEP

#define LINKER_KEEP

(

symbol

)

Value:

        static const void * const symbol##_ptr  __used \
        __attribute__((__section__(".symbol_to_keep"))) = (void *)&symbol

Tag a symbol (e.g.

function) to be kept in the binary even though it is not used.

It prevents symbol from being removed by the linker garbage collector. It is achieved by adding a pointer to that symbol to the kept memory section.

Parameters

symbol

Symbol to keep.

REQUIRES

#define REQUIRES

(

sym

)

Value:

__asm__ (".set " # sym "_Requires, " # sym "\n\t");

STRINGIFY

#define STRINGIFY

(

s

)

Value:

Z_STRINGIFY(s)

ZRESTRICT

#define ZRESTRICT   restrict