On 8/2/07, Miklos Szeredi <[email protected]> wrote:
> The linux kernel doesn't have a type safe object allocator a-la new()
> in C++ or g_new() in glib.
>
> Introduce two helpers for this purpose:
>
> alloc_struct(type, gfp_flags);
>
> zalloc_struct(type, gfp_flags);
ick.
> These macros take a type name (usually a 'struct foo') as first
> argument
So one has to type struct twice.
> and the usual gfp-flags as second argument. They return a
> pointer cast to 'type *'.
>
> The traditional forms of allocating a structure are:
>
> fooptr = kmalloc(sizeof(*fooptr), ...);
>
> fooptr = kmalloc(sizeof(struct foo), ...);
Key word is "traditional". Good traditional form which even half-competent
C programmers immediately parse in retina.
> The new form is preferred over these, because of it's type safety and
> more descriptive nature.
> +/**
> + * alloc_struct - allocate given type object
> + * @type: the type of the object to allocate
> + * @flags: the type of memory to allocate.
> + */
> +#define alloc_struct(type, flags) ((type *) kmalloc(sizeof(type), flags))
someone will write alloc_struct(int, GFP_KERNEL), I promise.
Can you play instead with something Lisp based which has infinetely more
potential for idioms.
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