Return to macros.h CVS log

Up to [GnuMach] / Gnu-Mach / kern

Annotation of Gnu-Mach/kern/macros.h, revision 1.1.1.1

1.1       root        1: /*
                      2:  * Copyright (c) 2009, 2010, 2013 Richard Braun.
                      3:  *
                      4:  * This program is free software: you can redistribute it and/or modify
                      5:  * it under the terms of the GNU General Public License as published by
                      6:  * the Free Software Foundation, either version 3 of the License, or
                      7:  * (at your option) any later version.
                      8:  *
                      9:  * This program is distributed in the hope that it will be useful,
                     10:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
                     11:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
                     12:  * GNU General Public License for more details.
                     13:  *
                     14:  * You should have received a copy of the GNU General Public License
                     15:  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
                     16:  *
                     17:  *
                     18:  * Helper macros.
                     19:  */
                     20: 
                     21: #ifndef _KERN_MACROS_H
                     22: #define _KERN_MACROS_H
                     23: 
                     24: #define MACRO_BEGIN         ({
                     25: #define MACRO_END           })
                     26: #define        MACRO_RETURN    if (1) return
                     27: 
                     28: #define __QUOTE(x)          #x
                     29: #define QUOTE(x)            __QUOTE(x)
                     30: 
                     31: #ifdef __ASSEMBLER__
                     32: #define DECL_CONST(x, s)    x
                     33: #else /* __ASSEMBLER__ */
                     34: #define __DECL_CONST(x, s)  x##s
                     35: #define DECL_CONST(x, s)    __DECL_CONST(x, s)
                     36: #endif /* __ASSEMBLER__ */
                     37: 
                     38: #define STRLEN(x)           (sizeof(x) - 1)
                     39: #define ARRAY_SIZE(x)       (sizeof(x) / sizeof((x)[0]))
                     40: 
                     41: #define MIN(a, b)           ((a) < (b) ? (a) : (b))
                     42: #define MAX(a, b)           ((a) > (b) ? (a) : (b))
                     43: 
                     44: #define DIV_CEIL(n, d)      (((n) + (d) - 1) / (d))
                     45: 
                     46: #define P2ALIGNED(x, a)     (((x) & ((a) - 1)) == 0)
                     47: #define ISP2(x)             P2ALIGNED(x, x)
                     48: #define P2ALIGN(x, a)       ((x) & -(a))
                     49: #define P2ROUND(x, a)       (-(-(x) & -(a)))
                     50: #define P2END(x, a)         (-(~(x) & -(a)))
                     51: 
                     52: #define structof(ptr, type, member) \
                     53:     ((type *)((char *)(ptr) - offsetof(type, member)))
                     54: 
                     55: #define access_once(x)      (*(volatile typeof(x) *)&(x))
                     56: 
                     57: #define alignof(x)          __alignof__(x)
                     58: 
                     59: #ifndef likely
                     60: #define likely(expr)        __builtin_expect(!!(expr), 1)
                     61: #endif /* likely */
                     62: #ifndef unlikely
                     63: #define unlikely(expr)      __builtin_expect(!!(expr), 0)
                     64: #endif /* unlikely */
                     65: 
                     66: #ifndef barrier
                     67: #define barrier()           asm volatile("" : : : "memory")
                     68: #endif /* barrier */
                     69: 
                     70: #define __noreturn          __attribute__((noreturn))
                     71: #define __aligned(x)        __attribute__((aligned(x)))
                     72: #define __always_inline     inline __attribute__((always_inline))
                     73: #ifndef __section
                     74: #define __section(x)        __attribute__((section(x)))
                     75: #endif /* __section */
                     76: #define __packed            __attribute__((packed))
                     77: #define __alias(x)          __attribute__((alias(x)))
                     78: 
                     79: #define __format_printf(fmt, args) \
                     80:     __attribute__((format(printf, fmt, args)))
                     81: 
                     82: #endif /* _KERN_MACROS_H */

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