Return to macros.h CVS log

Up to [GnuMach] / Gnu-Mach / kern

Annotation of Gnu-Mach/kern/macros.h, revision 1.1.1.2

1.1       root        1: /*
1.1.1.2 ! root        2:  * Copyright (c) 2009-2015 Richard Braun.
        !             3:  * All rights reserved.
1.1       root        4:  *
1.1.1.2 ! root        5:  * Redistribution and use in source and binary forms, with or without
        !             6:  * modification, are permitted provided that the following conditions
        !             7:  * are met:
        !             8:  * 1. Redistributions of source code must retain the above copyright
        !             9:  *    notice, this list of conditions and the following disclaimer.
        !            10:  * 2. Redistributions in binary form must reproduce the above copyright
        !            11:  *    notice, this list of conditions and the following disclaimer in the
        !            12:  *    documentation and/or other materials provided with the distribution.
1.1       root       13:  *
1.1.1.2 ! root       14:  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
        !            15:  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
        !            16:  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
        !            17:  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
        !            18:  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
        !            19:  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
        !            20:  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
        !            21:  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
        !            22:  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
        !            23:  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
1.1       root       24:  *
                     25:  *
                     26:  * Helper macros.
1.1.1.2 ! root       27:  *
        !            28:  * Upstream site with license notes :
        !            29:  * http://git.sceen.net/rbraun/librbraun.git/
1.1       root       30:  */
                     31: 
                     32: #ifndef _KERN_MACROS_H
                     33: #define _KERN_MACROS_H
                     34: 
                     35: #define MACRO_BEGIN         ({
                     36: #define MACRO_END           })
                     37: #define        MACRO_RETURN    if (1) return
                     38: 
                     39: #define __QUOTE(x)          #x
                     40: #define QUOTE(x)            __QUOTE(x)
                     41: 
                     42: #ifdef __ASSEMBLER__
                     43: #define DECL_CONST(x, s)    x
                     44: #else /* __ASSEMBLER__ */
                     45: #define __DECL_CONST(x, s)  x##s
                     46: #define DECL_CONST(x, s)    __DECL_CONST(x, s)
                     47: #endif /* __ASSEMBLER__ */
                     48: 
                     49: #define STRLEN(x)           (sizeof(x) - 1)
                     50: #define ARRAY_SIZE(x)       (sizeof(x) / sizeof((x)[0]))
                     51: 
                     52: #define MIN(a, b)           ((a) < (b) ? (a) : (b))
                     53: #define MAX(a, b)           ((a) > (b) ? (a) : (b))
                     54: 
                     55: #define DIV_CEIL(n, d)      (((n) + (d) - 1) / (d))
                     56: 
                     57: #define P2ALIGNED(x, a)     (((x) & ((a) - 1)) == 0)
                     58: #define ISP2(x)             P2ALIGNED(x, x)
                     59: #define P2ALIGN(x, a)       ((x) & -(a))
                     60: #define P2ROUND(x, a)       (-(-(x) & -(a)))
                     61: #define P2END(x, a)         (-(~(x) & -(a)))
                     62: 
                     63: #define structof(ptr, type, member) \
                     64:     ((type *)((char *)(ptr) - offsetof(type, member)))
                     65: 
                     66: #define access_once(x)      (*(volatile typeof(x) *)&(x))
                     67: 
                     68: #define alignof(x)          __alignof__(x)
                     69: 
                     70: #ifndef likely
                     71: #define likely(expr)        __builtin_expect(!!(expr), 1)
                     72: #endif /* likely */
                     73: #ifndef unlikely
                     74: #define unlikely(expr)      __builtin_expect(!!(expr), 0)
                     75: #endif /* unlikely */
                     76: 
                     77: #ifndef barrier
                     78: #define barrier()           asm volatile("" : : : "memory")
                     79: #endif /* barrier */
                     80: 
                     81: #define __noreturn          __attribute__((noreturn))
                     82: #define __aligned(x)        __attribute__((aligned(x)))
                     83: #define __always_inline     inline __attribute__((always_inline))
                     84: #ifndef __section
                     85: #define __section(x)        __attribute__((section(x)))
                     86: #endif /* __section */
                     87: #define __packed            __attribute__((packed))
                     88: #define __alias(x)          __attribute__((alias(x)))
                     89: 
                     90: #define __format_printf(fmt, args) \
                     91:     __attribute__((format(printf, fmt, args)))
                     92: 
                     93: #endif /* _KERN_MACROS_H */

This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.