Method with_size

cranelift/jit/src/memory/system.rs:29–40

Create a new `PtrLen` pointing to at least `size` bytes of memory, suitably sized and aligned for memory protection.

(size: usize)

    /// Create a new `PtrLen` pointing to at least `size` bytes of memory,
    /// suitably sized and aligned for memory protection.
    fn with_size(size: usize) -> io::Result<Self> {
        let alloc_size = region::page::ceil(size as *const ()) as usize;
        MmapMut::map_anon(alloc_size).map(|mut mmap| {
            // The order here is important; we assign the pointer first to get
            // around compile time borrow errors.
            Self {
                ptr: mmap.as_mut_ptr(),
                map: Some(mmap),
                len: alloc_size,
            }
        })
    }
}

/// JIT memory manager. This manages pages of suitably aligned and