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compiler.h
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compiler.h
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/*
* Copyright 2005 Timo Hirvonen
*/
#ifndef COMPILER_H
#define COMPILER_H
/*
* GCC 2.96 or compatible required
*/
/* Optimization: Condition @x is likely */
#define likely(x) __builtin_expect(!!(x), 1)
/* Optimization: Condition @x is unlikely */
#define unlikely(x) __builtin_expect(!!(x), 0)
/* Optimization: Function never returns */
#define __NORETURN __attribute__((__noreturn__))
/* Argument at index @fmt_idx is printf compatible format string and
* argument at index @first_idx is the first format argument */
#define __FORMAT(fmt_idx, first_idx) __attribute__((format(printf, (fmt_idx), (first_idx))))
#if defined(__GNUC__) && (__GNUC__ >= 3)
/* Optimization: Pointer returned can't alias other pointers */
#define __MALLOC __attribute__((__malloc__))
#else
#define __MALLOC
#endif
#endif