utilities.h File Reference

Utility routines for libmetal. More...

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

Go to the source code of this file.

Macros
#define	MB   (1024UL << 10UL)
#define	GB   (MB << 10UL)
#define	metal_unused(x)
	Marker for unused function arguments/variables.
#define	metal_dim(x)
	Figure out number of elements in an array.
#define	metal_min(x, y)
	Minimum of two numbers (warning: multiple evaluation!).
#define	metal_max(x, y)
	Maximum of two numbers (warning: multiple evaluation!).
#define	metal_sign(x)
	Sign of a number [-1, 0, or 1] (warning: multiple evaluation!).
#define	metal_align_down(size, align)
	Align 'size' down to a multiple of 'align' (must be a power of two).
#define	metal_align_up(size, align)
	Align 'size' up to a multiple of 'align' (must be a power of two).
#define	metal_div_round_down(num, den)
	Divide (and round down).
#define	metal_div_round_up(num, den)
	Divide (and round up).
#define	metal_ptr_align_down(ptr, align)
	Align 'ptr' down to a multiple of 'align' (must be a power of two).
#define	metal_ptr_align_up(ptr, align)
	Align 'ptr' up to a multiple of 'align' (must be a power of two).
#define	metal_offset_of(structure, member)
	Compute offset of a field within a structure.
#define	metal_container_of(ptr, structure, member)
	Compute pointer to a structure given a pointer to one of its fields.
#define	METAL_BITS_PER_ULONG   (CHAR_BIT * sizeof(unsigned long))
#define	metal_bit(bit)
#define	metal_bitmap_longs(x)
#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.