Utility routines for libmetal. More...

#include <stdint.h>
#include <limits.h>
#include <metal/assert.h>

Macros
#define	MB (1024UL << 10UL)

#define	GB (MB << 10UL)

#define	metal_unused(x) do { (x) = (x); } while (0)
	Marker for unused function arguments/variables. More...

#define	metal_dim(x) (sizeof(x) / sizeof(x[0]))
	Figure out number of elements in an array. More...

#define	metal_min(x, y) ((x) < (y) ? (x) : (y))
	Minimum of two numbers (warning: multiple evaluation!). More...

#define	metal_max(x, y) ((x) > (y) ? (x) : (y))
	Maximum of two numbers (warning: multiple evaluation!). More...

#define	metal_sign(x) ((x) < 0 ? -1 : ((x) > 0 ? 1 : 0))
	Sign of a number [-1, 0, or 1] (warning: multiple evaluation!). More...

#define	metal_align_down(size, align) ((size) & ~((align) - 1))
	Align 'size' down to a multiple of 'align' (must be a power of two). More...

#define	metal_align_up(size, align) metal_align_down((size) + (align) - 1, align)
	Align 'size' up to a multiple of 'align' (must be a power of two). More...

#define	metal_div_round_down(num, den) ((num) / (den))
	Divide (and round down). More...

#define	metal_div_round_up(num, den) metal_div_round_down((num) + (den) - 1, (den))
	Divide (and round up). More...

#define	metal_ptr_align_down(ptr, align) (void *)(metal_align_down((uintptr_t)(ptr), (uintptr_t)(align)))
	Align 'ptr' down to a multiple of 'align' (must be a power of two). More...

#define	metal_ptr_align_up(ptr, align) (void *)(metal_align_up((uintptr_t)(ptr), (uintptr_t)(align)))
	Align 'ptr' up to a multiple of 'align' (must be a power of two). More...

#define	metal_offset_of(structure, member) ((uintptr_t)&(((structure *)0)->member))
	Compute offset of a field within a structure. More...

#define	metal_container_of(ptr, structure, member) (void *)((uintptr_t)(ptr) - metal_offset_of(structure, member))
	Compute pointer to a structure given a pointer to one of its fields. More...

#define	METAL_BITS_PER_ULONG (CHAR_BIT * sizeof(unsigned long))

#define	metal_bit(bit) (1UL << (bit))

#define	metal_bitmap_longs(x) metal_div_round_up((x), METAL_BITS_PER_ULONG)

#define	metal_bitmap_for_each_set_bit(bitmap, bit, max)

#define	metal_bitmap_for_each_clear_bit(bitmap, bit, max)

Functions
static void	metal_bitmap_set_bit (unsigned long *bitmap, int bit)

static int	metal_bitmap_is_bit_set (unsigned long *bitmap, int bit)

static void	metal_bitmap_clear_bit (unsigned long *bitmap, int bit)

static int	metal_bitmap_is_bit_clear (unsigned long *bitmap, int bit)

static unsigned int	metal_bitmap_next_set_bit (unsigned long *bitmap, unsigned int start, unsigned int max)

static unsigned int	metal_bitmap_next_clear_bit (unsigned long *bitmap, unsigned int start, unsigned int max)

static unsigned long	metal_log2 (unsigned long in)

Detailed Description

Utility routines for libmetal.

Macros

Functions

Detailed Description