Crate reusable_memory

Source
Expand description

§Basic usage

use reusable_memory::ReusableMemory;
 
let mut memory: ReusableMemory<u8> = ReusableMemory::new();
 
{
	// The memory can then be borrowed as a different type:
	let mut borrowed_memory = memory.borrow_mut_as::<usize>(std::num::NonZeroUsize::new(3).unwrap());
 
	// Now `borrowed_memory` holds a pointer to enough memory to store 3 properly-aligned `usize`s inside the memory allocated in `memory`.
	borrowed_memory.push(1).unwrap();
	borrowed_memory.push(2).unwrap();
	borrowed_memory.push(std::usize::MAX).unwrap();
	// `push` will return an `Err` if the pushed value would not fit into the capacity of the borrowed memory.
 
	assert_eq!(borrowed_memory.as_slice(), &[1, 2, std::usize::MAX]);
 
	// values can also be `pop`ed or `drain`ed as with `Vec`:
	assert_eq!(borrowed_memory.pop(), Some(std::usize::MAX));
	assert_eq!(borrowed_memory.drain(..).collect::<Vec<usize>>().as_slice(), &[1, 2]);
	assert_eq!(borrowed_memory.pop(), None);
}
// The borrowed memory is automatically returned when the object is dropped, and the pushed values are dropped as well.
 
// Now the memory can be reused, even as multiple different types (current limit is 5 because the code is generated by a macro):
{
	let (mut borrow_t, mut borrow_u) = memory.borrow_mut_two_as::<usize, u8>(
		[
			std::num::NonZeroUsize::new(1).unwrap(),
			std::num::NonZeroUsize::new(2).unwrap()
		]
	);
 
	borrow_t.push(0usize).unwrap();
 	
	borrow_u.push(1u8).unwrap();
	borrow_u.push(2u8).unwrap();
 
	assert_eq!(borrow_t.as_slice(), &[0usize]);
 
	assert_eq!(borrow_u.as_slice(), &[1u8, 2u8]);
}

Modules§

Structs§