Luna::memsize

usize memsize(void *ptr, usize alignment=0)

Gets the allocated size of one memory block.

Parameters

• in ptr

  The pointer to the memory block.

• in alignment

  Optional. The alignment requirement of the allocated memory block. Default is 0.

Return value

Returns the size of bytes of the memory block. Returns 0 if ptr is nullptr.

The returned size is the size allocated for the memory block and is available for the user to use. The allocated size may be larger than the required size passed to memalloc or memrealloc to satisfy alignment and padding requirements.

Valid Usage

• If ptr is not nullptr, ptrmust be allocated by a prior call to memalloc or memrealloc.

• If ptr is not nullptr, alignmentmust be equal to alignment passed to memalloc or memrealloc which allocates ptr.