Module utils 

Small utilities shared by the GPU memory and kernel-launch paths.

Everything here is pure CPU arithmetic; nothing touches a device except get_optimal_backend, which probes scirs2_core::gpu for a usable backend.

Functions

align_size

Round size up to the next multiple of alignment.

calculate_block_size

Launch geometry for a 1-D kernel over n elements.

calculate_fragmentation

External fragmentation of a free list given as (block_size, count) pairs.

checked_next_power_of_two

Smallest power of two greater than or equal to n, or None on overflow.

format_bytes

Format a byte count with a binary unit suffix.

get_optimal_backend

First backend from SUPPORTED_BACKENDS-style probing that opens a context.

is_aligned

Whether addr sits on an alignment boundary.