Module heap 

The arithmetic of the allocator over the SDK’s realloc (crate::device).

The SDK’s realloc returns blocks aligned to MIN_ALIGN bytes. A bigger alignment gets a block padded_size long; the pointer handed out is offset bytes into it, and the block’s own address is kept in the word just before that pointer, so freeing finds it again.

Constants

MIN_ALIGN

The alignment every block from the SDK’s realloc has.

Functions

needs_padding

Whether a block of alignment align needs padding.

offset

How far into a padded block at address raw the pointer handed out is, for alignment align (a power of two above MIN_ALIGN).

padded_size

The size to ask the SDK for, for size bytes aligned to align (padded); None when that overflows.