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.Dd May 23, 2006
.Dt MALLOC_SIZE 3
.Os
.Sh NAME
.Nm malloc_good_size ,
.Nm malloc_size
.Nd memory allocation information
.Sh SYNOPSIS
.In malloc/malloc.h
.Ft size_t
.Fo malloc_good_size
.Fa "size_t size"
.Fc
.Ft size_t
.Fo malloc_size
.Fa "const void *ptr"
.Fc
.Sh DESCRIPTION
The
.Fn malloc_size
function returns the size of the memory block
that backs the allocation pointed to by
.Fa ptr .
The memory block size is always at least as large
as the allocation it backs, and may be larger.
.Pp
The
.Fn malloc_good_size
function rounds
.Fa size
up to a value that the allocator implementation can allocate
without adding any padding;
it then returns that rounded-up value.
.Sh SEE ALSO
.Xr malloc 3