utils.h File Reference

Utility macros for alignment, min/max, and size conversions. More...

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Macros
#define	ALIGN(x, a)
	Align a value to the specified alignment boundary.
#define	MAX(a, b)
	Return the maximum of two values.
#define	MIN(a, b)
	Return the minimum of two values.
#define	KiB(x)
	Convert a value to kibibytes.
#define	MiB(x)
	Convert a value to mebibytes.

Detailed Description

Utility macros for alignment, min/max, and size conversions.

Macro Definition Documentation

ALIGN

#define ALIGN	(		x,
			a )

Value:

(((x) + ((typeof(x))(a) - 1)) & ~((typeof(x))(a) - 1))

Align a value to the specified alignment boundary.

This macro aligns the given value x to the specified alignment a.

Parameters

x	The value to align.
a	The alignment boundary (must be a power of two).

Returns

The aligned value.

MAX

#define MAX	(		a,
			b )

Value:

({ typeof(a) _a = a; typeof(b) _b = b; _a > _b ? _a : _b; })

Return the maximum of two values.

This macro returns the maximum of the two provided values a and b.

Parameters

a	The first value.
b	The second value.

Returns

The maximum of a and b.

MIN

#define MIN	(		a,
			b )

Value:

({ typeof(a) _a = a; typeof(b) _b = b; _a < _b ? _a : _b; })

Return the minimum of two values.

This macro returns the minimum of the two provided values a and b.

Parameters

a	The first value.
b	The second value.

Returns

The minimum of a and b.

KiB

#define KiB

(

x

)

Value:

((x) * 1024)

Convert a value to kibibytes.

This macro converts the given value x to kibibytes (multiplying by 1024).

Parameters

x	The value to convert.

Returns

The value in kibibytes.

MiB

#define MiB

(

x

)

Value:

((x) * 1024 * 1024)

Convert a value to mebibytes.

This macro converts the given value x to mebibytes (multiplying by 1024*1024).

Parameters

x	The value to convert.

Returns

The value in mebibytes.