12 #ifndef __METAL_UTILITIES__H__
13 #define __METAL_UTILITIES__H__
17 #include <metal/assert.h>
28 #define metal_unused(x) do { (x) = (x); } while (0)
31 #define metal_dim(x) (sizeof(x) / sizeof(x[0]))
34 #define metal_min(x, y) ((x) < (y) ? (x) : (y))
37 #define metal_max(x, y) ((x) > (y) ? (x) : (y))
40 #define metal_sign(x) ((x) < 0 ? -1 : ((x) > 0 ? 1 : 0))
43 #define metal_align_down(size, align) \
44 ((size) & ~((align) - 1))
47 #define metal_align_up(size, align) \
48 metal_align_down((size) + (align) - 1, align)
51 #define metal_div_round_down(num, den) \
55 #define metal_div_round_up(num, den) \
56 metal_div_round_down((num) + (den) - 1, (den))
59 #define metal_ptr_align_down(ptr, align) \
60 (void *)(metal_align_down((uintptr_t)(ptr), (uintptr_t)(align)))
63 #define metal_ptr_align_up(ptr, align) \
64 (void *)(metal_align_up((uintptr_t)(ptr), (uintptr_t)(align)))
67 #define metal_offset_of(structure, member) \
68 ((uintptr_t)&(((structure *)0)->member))
71 #define metal_container_of(ptr, structure, member) \
72 (void *)((uintptr_t)(ptr) - metal_offset_of(structure, member))
74 #define METAL_BITS_PER_ULONG (CHAR_BIT * sizeof(unsigned long))
76 #define metal_bit(bit) (1UL << (bit))
78 #define metal_bitmap_longs(x) metal_div_round_up((x), METAL_BITS_PER_ULONG)
103 static inline unsigned int
116 #define metal_bitmap_for_each_set_bit(bitmap, bit, max) \
117 for ((bit) = metal_bitmap_next_set_bit((bitmap), 0, (max)); \
119 (bit) = metal_bitmap_next_set_bit((bitmap), (bit + 1), (max)))
121 static inline unsigned int
134 #define metal_bitmap_for_each_clear_bit(bitmap, bit, max) \
135 for ((bit) = metal_bitmap_next_clear_bit((bitmap), 0, (max)); \
137 (bit) = metal_bitmap_next_clear_bit((bitmap), (bit + 1), (max)))
141 unsigned long result;
145 for (result = 0; (1UL << result) < in; result++)
#define metal_assert(cond)
Assertion macro.
Definition: assert.h:21
#define METAL_BITS_PER_ULONG
Definition: utilities.h:74
static unsigned long metal_log2(unsigned long in)
Definition: utilities.h:139
static void metal_bitmap_set_bit(unsigned long *bitmap, int bit)
Definition: utilities.h:80
#define metal_bit(bit)
Definition: utilities.h:76
static int metal_bitmap_is_bit_set(unsigned long *bitmap, int bit)
Definition: utilities.h:86
static void metal_bitmap_clear_bit(unsigned long *bitmap, int bit)
Definition: utilities.h:92
static unsigned int metal_bitmap_next_set_bit(unsigned long *bitmap, unsigned int start, unsigned int max)
Definition: utilities.h:104
static unsigned int metal_bitmap_next_clear_bit(unsigned long *bitmap, unsigned int start, unsigned int max)
Definition: utilities.h:122
static int metal_bitmap_is_bit_clear(unsigned long *bitmap, int bit)
Definition: utilities.h:98