| /* |
| * Copyright (c) 2008-2014 Travis Geiselbrecht |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining |
| * a copy of this software and associated documentation files |
| * (the "Software"), to deal in the Software without restriction, |
| * including without limitation the rights to use, copy, modify, merge, |
| * publish, distribute, sublicense, and/or sell copies of the Software, |
| * and to permit persons to whom the Software is furnished to do so, |
| * subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice shall be |
| * included in all copies or substantial portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. |
| * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY |
| * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, |
| * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE |
| * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
| */ |
| #ifndef __LK_MACROS_H |
| #define __LK_MACROS_H |
| |
| #include <stddef.h> |
| #include <stdint.h> |
| |
| #define MIN(a, b) (((a) < (b)) ? (a) : (b)) |
| #define MAX(a, b) (((a) > (b)) ? (a) : (b)) |
| |
| __attribute__((no_sanitize("unsigned-integer-overflow"))) |
| static inline uintptr_t round_up(uintptr_t val, size_t alignment) { |
| return (val + (alignment - 1)) & ~(alignment - 1); |
| } |
| |
| static inline uintptr_t round_down(uintptr_t val, size_t alignment) { |
| return val & ~(alignment - 1); |
| } |
| |
| #define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d)) |
| |
| static inline uintptr_t align(uintptr_t ptr, size_t alignment) { |
| return round_up(ptr, alignment); |
| } |
| |
| #define IS_ALIGNED(a, b) (!(((uintptr_t)(a)) & (((uintptr_t)(b))-1))) |
| |
| #define containerof(ptr, type, member) \ |
| ((type *)((uintptr_t)(ptr) - offsetof(type, member))) |
| |
| #define containerof_null_safe(ptr, type, member) ({ \ |
| __typeof__(ptr) __ptr = ptr;\ |
| type *__t;\ |
| if(__ptr)\ |
| __t = containerof(__ptr, type, member);\ |
| else\ |
| __t = (type *)0;\ |
| __t;\ |
| }) |
| |
| #endif |
| |