ofalign.h File Reference

Implements platform independent alignment, if possible similar to C++11's alignof / alignas functionality. More...

Macros
#define	OFalignof   <unspecified>
	Determine the alignment of a type T. More...
#define	OFalignas   <unspecified>
	Align object or class like another type or as specified by an integral expression. More...
#define	OFalign   <unspecified>
	Determine a type with modified alignment for a given type T. More...
#define	OFalign_typename   OFTypename <unspecified>
	Alternate version of OFalign to be used within templates. More...

Detailed Description

Implements platform independent alignment, if possible similar to C++11's alignof / alignas functionality.

Macro Definition Documentation

#define OFalign   <unspecified>

Determine a type with modified alignment for a given type T.

Note

OFalign may not be available on your platform / compiler combination. Use #ifdef OFalign to query availability.

See also

OFalign_typename

OFalign can be though of as the least common denominator of the alignment capabilities available on different platform / compiler combinations. Given a type T and an integral expression I, OFalign(T,I) evaluates to an appropriately aligned type corresponding to T.
You may also use another type to specify the desired alignment, e.g. OFalign(T,int). OFalign will then calculate the alignment using OFalignof (if available) or use sizeof() as approximation.
To align arrays via OFalign, simply pass the array's extents within the parameter, e.g. OFalign(char[12],float) to align an array containing 12 chars like a float.
When using OFalign inside a dependant scope (i.e. inside templates), you may need to use OFalign_typename instead, e.g.

typedef OFalign_typename(T,16) value_type; 

OFalign should support alignments as any power of two <= 8192 (examine your compiler's manual when in doubt). Other alignments may also be supported, but may not be available on every platform. OFalign may simply ignore your request if you specify an unsupported aligment (won't output an error). You may want to check the alignment via OFalignof in case it is likely to fail. Using another type as alignment specifier should always work, as the required alignment is obviously supported in that case (at least when OFalignof is available).

#define OFalign_typename   OFTypename <unspecified>

Alternate version of OFalign to be used within templates.

Note

OFalign_typename may not be available on your platform / compiler combination. Use #ifdef OFalign or #ifdef OFalign_typename to query availability.

See also

OFalign

OFalign_typename is an alternate version of OFalign that internally uses keywords like OFTypename so it can be used inside a dependant scope. See OFalign for more information.

#define OFalignas   <unspecified>

Align object or class like another type or as specified by an integral expression.

Note

OFalignas may not be available on your platform / compiler combination. Use #ifdef OFalignas to query availability. See OFalign for an alternative with limited functionality that supports more platforms in return.

OFalignas behaves similar to C++11's alignas when it's supported.

#define OFalignof   <unspecified>

Determine the alignment of a type T.

Note

OFalignof may not be available on your platform / compiler combination. Use #ifdef OFalignof to query availability.

OFalignof behaves similar to C++11's alignof when it's supported.