mirror of
https://github.com/phil-opp/blog_os.git
synced 2025-12-16 22:37:49 +00:00
a8600a00b6
If a Frame would be clonable or even Copy, the frame could be freed (e.g. passed to deallocate_frame) and used thereafter. Or it could be freed multiple times.
22 lines
460 B
Rust
22 lines
460 B
Rust
pub use self::area_frame_allocator::AreaFrameAllocator;
|
|
|
|
mod area_frame_allocator;
|
|
|
|
pub const PAGE_SIZE: usize = 4096;
|
|
|
|
#[derive(Debug, PartialEq, Eq, PartialOrd, Ord)]
|
|
pub struct Frame {
|
|
number: usize,
|
|
}
|
|
|
|
impl Frame {
|
|
fn containing_address(address: usize) -> Frame {
|
|
Frame{ number: address / PAGE_SIZE }
|
|
}
|
|
}
|
|
|
|
pub trait FrameAllocator {
|
|
fn allocate_frame(&mut self) -> Option<Frame>;
|
|
fn deallocate_frame(&mut self, frame: Frame);
|
|
}
|