tools/include/linux/compiler_types.h

Source file repositories/reference/linux-study-clean/tools/include/linux/compiler_types.h

File Facts

System
Linux kernel
Corpus path
tools/include/linux/compiler_types.h
Extension
.h
Size
1314 bytes
Lines
50
Domain
Support Tooling And Documentation
Bucket
tools
Inferred role
Support Tooling And Documentation: implementation source
Status
source implementation candidate

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

Detected Declarations

Annotated Snippet

#ifndef __LINUX_COMPILER_TYPES_H
#define __LINUX_COMPILER_TYPES_H

/* Builtins */

/*
 * __has_builtin is supported on gcc >= 10, clang >= 3 and icc >= 21.
 * In the meantime, to support gcc < 10, we implement __has_builtin
 * by hand.
 */
#ifndef __has_builtin
#define __has_builtin(x) (0)
#endif

#include <linux/compiler-context-analysis.h>

/* Compiler specific macros. */
#ifdef __GNUC__
#include <linux/compiler-gcc.h>
#endif

#ifndef asm_goto_output
#define asm_goto_output(x...) asm goto(x)
#endif

/*
 * __unqual_scalar_typeof(x) - Declare an unqualified scalar type, leaving
 *			       non-scalar types unchanged.
 */
/*
 * Prefer C11 _Generic for better compile-times and simpler code. Note: 'char'
 * is not type-compatible with 'signed char', and we define a separate case.
 */
#define __scalar_type_to_expr_cases(type)				\
		unsigned type:	(unsigned type)0,			\
		signed type:	(signed type)0

#define __unqual_scalar_typeof(x) typeof(				\
		_Generic((x),						\
			 char:	(char)0,				\
			 __scalar_type_to_expr_cases(char),		\
			 __scalar_type_to_expr_cases(short),		\
			 __scalar_type_to_expr_cases(int),		\
			 __scalar_type_to_expr_cases(long),		\
			 __scalar_type_to_expr_cases(long long),	\
			 default: (x)))

#endif /* __LINUX_COMPILER_TYPES_H */

Annotation

Implementation Notes