Gabriel Kaszewski
5766c6f7f7
Separate abstractions from implementations following DIP:
servers/ drivers/
│ │
▼ ▼
ports/ (trait-only crates, zero deps)
New crates:
ports/ (abstractions):
- port-framebuffer: Framebuffer trait
- port-block-device: BlockDevice trait + SectorId
- port-input-device: InputDevice trait + InputEvent types
drivers/ (implementations depend on ports/):
- driver-framebuffer-virtio: VirtIO GPU framebuffer
- driver-framebuffer-mock: test double
- driver-block-virtio: VirtIO block device
bins/ (composition roots wire server + driver):
- display-qemu: DisplayServer<VirtioFramebuffer>
- storage-qemu: storage server with VirtIO block
Servers no longer own their hardware traits or driver code.
Neither server nor driver depends on the other — both point
inward to the port abstraction.
22 lines
467 B
Rust
22 lines
467 B
Rust
#![no_std]
|
|
|
|
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
|
|
pub struct SectorId(u32);
|
|
|
|
impl SectorId {
|
|
pub const fn new(id: u32) -> Self {
|
|
Self(id)
|
|
}
|
|
|
|
pub const fn raw(&self) -> u32 {
|
|
self.0
|
|
}
|
|
}
|
|
|
|
pub trait BlockDevice {
|
|
fn sector_size(&self) -> usize;
|
|
fn sector_count(&self) -> usize;
|
|
fn read_sector(&mut self, sector: SectorId, buf: &mut [u8]) -> bool;
|
|
fn write_sector(&mut self, sector: SectorId, buf: &[u8]) -> bool;
|
|
}
|