Default definitions of C compiler quirk work-arounds. More...

#include "contiki.h"

Macros
#define	ASSUME(c)
	Configure if the C compiler supports taking hints from the user about invariants, e.g.

#define	CC_NORETURN
	Configure if the C compiler supports functions that are not meant to return e.g.

#define	CC_CONSTRUCTOR(prio)
	Configure if the C compiler supports marking functions as constructors e.g.

#define	CC_DESTRUCTOR(prio)
	Configure if the C compiler supports marking functions as destructors e.g.

#define	CC_DEPRECATED(msg)
	Configure if the C compiler supports marking functions as deprecated e.g.

#define	CC_ACCESS_NOW(type, variable) ((volatile type )&(variable))
	This macro ensures that the access to a non-volatile variable can not be reordered or optimized by the compiler.

#define	CC_CONCAT(s1, s2) CC_CONCAT2(s1, s2)
	A C preprocessing macro for concatenating two preprocessor tokens.

#define	CC_CONCAT3(s1, s2, s3) s1##s2##s3
	A C preprocessing macro for concatenating three preprocessor tokens.

Detailed Description

Default definitions of C compiler quirk work-arounds.

Author: Adam Dunkels adam@.nosp@m.dunk.nosp@m.els.c.nosp@m.om

This file is used for making use of extra functionality of some C compilers used for Contiki, and defining work-arounds for various quirks and problems with some other C compilers.

Definition in file cc.h.

Macro Definition Documentation

◆ ASSUME

#define ASSUME ( c )

Configure if the C compiler supports taking hints from the user about invariants, e.g.

with attribute((assume(hint))).

Definition at line 85 of file cc.h.

◆ CC_ACCESS_NOW

#define CC_ACCESS_NOW	(		type,
			variable ) ((volatile type )&(variable))

This macro ensures that the access to a non-volatile variable can not be reordered or optimized by the compiler.

See also https://lwn.net/Articles/508991/ - In Linux the macro is called ACCESS_ONCE The type must be passed, because the typeof-operator is a gcc extension

Definition at line 145 of file cc.h.

Referenced by ringbuf_get(), and ringbuf_put().

◆ CC_CONCAT

#define CC_CONCAT	(		s1,
			s2 ) CC_CONCAT2(s1, s2)

A C preprocessing macro for concatenating two preprocessor tokens.

We need use two macros (CC_CONCAT and CC_CONCAT2) in order to allow concatenation of two #defined macros.

Definition at line 175 of file cc.h.

◆ CC_CONSTRUCTOR

#define CC_CONSTRUCTOR ( prio )

Configure if the C compiler supports marking functions as constructors e.g.

with attribute((constructor(prio))).

Lower priority runs before higher priority. Priorities 0-100 are reserved.

Definition at line 111 of file cc.h.

◆ CC_DEPRECATED

#define CC_DEPRECATED ( msg )

Configure if the C compiler supports marking functions as deprecated e.g.

with attribute((deprecated))

Definition at line 133 of file cc.h.

◆ CC_DESTRUCTOR

#define CC_DESTRUCTOR ( prio )

Configure if the C compiler supports marking functions as destructors e.g.

with attribute((destructor(prio))).

Lower priority runs before higher priority. Priorities 0-100 are reserved.

Definition at line 123 of file cc.h.

◆ CC_NORETURN

#define CC_NORETURN

Configure if the C compiler supports functions that are not meant to return e.g.

with attribute((noreturn))

Definition at line 99 of file cc.h.

Macros