Function mi_malloc_csize 

pub unsafe fn mi_malloc_csize(size: size_t) -> *mut c_void

Allocate when the size is statically known by the caller.

This mirrors mimalloc’s inline mi_malloc_csize helper.

Safety

The returned pointer must be checked for null and freed with a compatible mimalloc free API. The caller is responsible for honoring raw allocation pointer aliasing and lifetime rules.