Most of post-12
This commit is contained in:
Timothy Warren
parent
22818dca6c
commit
396076eb75
218
Cargo.lock
generated
218
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"checksum raw-cpuid 6.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "30a9d219c32c9132f7be513c18be77c9881c7107d2ab5569d205a6a0f0e6dc7d"
|
||||
"checksum rustc_version 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)" = "138e3e0acb6c9fb258b19b67cb8abd63c00679d2851805ea151465464fe9030a"
|
||||
"checksum semver 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)" = "1d7eb9ef2c18661902cc47e535f9bc51b78acd254da71d375c2f6720d9a40403"
|
||||
"checksum semver-parser 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)" = "388a1df253eca08550bef6c72392cfe7c30914bf41df5269b68cbd6ff8f570a3"
|
||||
"checksum pin-project 0.4.16 (registry+https://github.com/rust-lang/crates.io-index)" = "81d480cb4e89522ccda96d0eed9af94180b7a5f93fb28f66e1fd7d68431663d1"
|
||||
"checksum pin-project-internal 0.4.16 (registry+https://github.com/rust-lang/crates.io-index)" = "a82996f11efccb19b685b14b5df818de31c1edcee3daa256ab5775dd98e72feb"
|
||||
"checksum pin-utils 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "8b870d8c151b6f2fb93e84a13146138f05d02ed11c7e7c54f8826aaaf7c9f184"
|
||||
"checksum proc-macro2 1.0.12 (registry+https://github.com/rust-lang/crates.io-index)" = "8872cf6f48eee44265156c111456a700ab3483686b3f96df4cf5481c89157319"
|
||||
"checksum quote 1.0.4 (registry+https://github.com/rust-lang/crates.io-index)" = "4c1f4b0efa5fc5e8ceb705136bfee52cfdb6a4e3509f770b478cd6ed434232a7"
|
||||
"checksum scopeguard 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "d29ab0c6d3fc0ee92fe66e2d99f700eab17a8d57d1c1d3b748380fb20baa78cd"
|
||||
"checksum spin 0.5.2 (registry+https://github.com/rust-lang/crates.io-index)" = "6e63cff320ae2c57904679ba7cb63280a3dc4613885beafb148ee7bf9aa9042d"
|
||||
"checksum uart_16550 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "5b9392f60931fe3bf8f24e0a15ee4f51528770f1d64c48768ab66571334d95b0"
|
||||
"checksum ux 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)" = "88dfeb711b61ce620c0cb6fd9f8e3e678622f0c971da2a63c4b3e25e88ed012f"
|
||||
"checksum spinning_top 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "32d801a3a53bcf5071f85fef8d5cab9e5f638fc5580a37e6eb7aba4b37438d24"
|
||||
"checksum syn 1.0.20 (registry+https://github.com/rust-lang/crates.io-index)" = "dd1b5e337360b1fae433c59fcafa0c6b77c605e92540afa5221a7b81a9eca91d"
|
||||
"checksum uart_16550 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)" = "2b5e5e7b79b55e1aa57b0ab994490d876d9c2f5b18c7716628155207e0e4b197"
|
||||
"checksum unicode-xid 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "826e7639553986605ec5979c7dd957c7895e93eabed50ab2ffa7f6128a75097c"
|
||||
"checksum volatile 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)" = "6af0edf5b4faacc31fc51159244d78d65ec580f021afcef7bd53c04aeabc7f29"
|
||||
"checksum x86_64 0.5.5 (registry+https://github.com/rust-lang/crates.io-index)" = "bb8f09c32a991cc758ebcb9b7984f530095d32578a4e7b85db6ee1f0bbe4c9c6"
|
||||
"checksum x86_64 0.7.5 (registry+https://github.com/rust-lang/crates.io-index)" = "997837f3913aac8f67164683258756d712376849906c8d609f844084bc03ef84"
|
||||
"checksum x86_64 0.10.3 (registry+https://github.com/rust-lang/crates.io-index)" = "df453cbef6f9a3f703c1866338da79ae8e98a86f7ccd90bca92e6f1583720941"
|
||||
"checksum x86_64 0.9.6 (registry+https://github.com/rust-lang/crates.io-index)" = "4206b60c9f99766329b66962aa8ddc01df6c7edd02edc046b7a69d5df9fcdbcf"
|
||||
|
||||
24
Cargo.toml
24
Cargo.toml
@ -7,17 +7,31 @@ edition = "2018"
|
||||
# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
|
||||
|
||||
[dependencies]
|
||||
bootloader = { version = "0.8.1", features = ["map_physical_memory"]}
|
||||
linked_list_allocator = "0.6.4"
|
||||
pc-keyboard = "0.3.1"
|
||||
bootloader = { version = "0.8.0", features = ["map_physical_memory"]}
|
||||
linked_list_allocator = "0.8.0"
|
||||
pc-keyboard = "0.5.0"
|
||||
pic8259_simple = "0.1.1"
|
||||
spin = "0.5.2"
|
||||
uart_16550 = "0.2.0"
|
||||
volatile = "0.2.6"
|
||||
x86_64 = "0.7.5"
|
||||
x86_64 = "0.9.6"
|
||||
|
||||
[dependencies.conquer-once]
|
||||
version = "0.2.0"
|
||||
default-features = false
|
||||
|
||||
[dependencies.crossbeam-queue]
|
||||
version = "0.2.1"
|
||||
default-features = false
|
||||
features = ["alloc"]
|
||||
|
||||
[dependencies.futures-util]
|
||||
version = "0.3.5"
|
||||
default-features = false
|
||||
features = ["alloc"]
|
||||
|
||||
[dependencies.lazy_static]
|
||||
version = "1.4.0"
|
||||
version = "1.0"
|
||||
features = ["spin_no_std"]
|
||||
|
||||
[profile.dev]
|
||||
|
||||
@ -38,7 +38,7 @@ unsafe impl GlobalAlloc for Dummy {
|
||||
pub fn init_heap(
|
||||
mapper: &mut impl Mapper<Size4KiB>,
|
||||
frame_allocator: &mut impl FrameAllocator<Size4KiB>,
|
||||
) -> Result<(), MapToError> {
|
||||
) -> Result<(), MapToError<Size4KiB>> {
|
||||
let page_range = {
|
||||
let heap_start = VirtAddr::new(HEAP_START as u64);
|
||||
let head_end = heap_start + HEAP_SIZE - 1u64;
|
||||
|
||||
@ -10,6 +10,12 @@ use crate::{print, println};
|
||||
#[cfg(test)]
|
||||
use crate::{serial_print, serial_println};
|
||||
|
||||
pub const PIC_1_OFFSET: u8 = 32;
|
||||
pub const PIC_2_OFFSET: u8 = PIC_1_OFFSET + 8;
|
||||
|
||||
pub static PICS: spin::Mutex<ChainedPics> =
|
||||
spin::Mutex::new(unsafe { ChainedPics::new(PIC_1_OFFSET, PIC_2_OFFSET) });
|
||||
|
||||
lazy_static! {
|
||||
static ref IDT: InterruptDescriptorTable = {
|
||||
let mut idt = InterruptDescriptorTable::new();
|
||||
@ -39,9 +45,8 @@ extern "x86-interrupt" fn breakpoint_handler(stack_frame: &mut InterruptStackFra
|
||||
extern "x86-interrupt" fn double_fault_handler(
|
||||
stack_frame: &mut InterruptStackFrame,
|
||||
_error_code: u64,
|
||||
) {
|
||||
println!("EXCEPTION: DOUBLE FAULT\n{:#?}", stack_frame);
|
||||
hlt_loop();
|
||||
) -> ! {
|
||||
panic!("EXCEPTION: DOUBLE FAULT\n{:#?}", stack_frame);
|
||||
}
|
||||
|
||||
extern "x86-interrupt" fn timer_interrupt_handler(_stack_frame: &mut InterruptStackFrame) {
|
||||
@ -53,34 +58,12 @@ extern "x86-interrupt" fn timer_interrupt_handler(_stack_frame: &mut InterruptSt
|
||||
}
|
||||
}
|
||||
|
||||
pub const PIC_1_OFFSET: u8 = 32;
|
||||
pub const PIC_2_OFFSET: u8 = PIC_1_OFFSET + 8;
|
||||
|
||||
pub static PICS: spin::Mutex<ChainedPics> =
|
||||
spin::Mutex::new(unsafe { ChainedPics::new(PIC_1_OFFSET, PIC_2_OFFSET) });
|
||||
|
||||
extern "x86-interrupt" fn keyboard_interrupt_handler(_stack_frame: &mut InterruptStackFrame) {
|
||||
use pc_keyboard::{layouts, DecodedKey, Keyboard, ScancodeSet1};
|
||||
use spin::Mutex;
|
||||
use x86_64::instructions::port::Port;
|
||||
|
||||
lazy_static! {
|
||||
static ref KEYBOARD: Mutex<Keyboard<layouts::Us104Key, ScancodeSet1>> =
|
||||
Mutex::new(Keyboard::new(layouts::Us104Key, ScancodeSet1));
|
||||
}
|
||||
|
||||
let mut keyboard = KEYBOARD.lock();
|
||||
let mut port = Port::new(0x60); // PS/2 port
|
||||
|
||||
let scancode: u8 = unsafe { port.read() };
|
||||
if let Ok(Some(key_event)) = keyboard.add_byte(scancode) {
|
||||
if let Some(key) = keyboard.process_keyevent(key_event) {
|
||||
match key {
|
||||
DecodedKey::Unicode(character) => print!("{}", character),
|
||||
DecodedKey::RawKey(key) => print!("{:?}", key),
|
||||
}
|
||||
}
|
||||
}
|
||||
crate::task::keyboard::add_scancode(scancode);
|
||||
|
||||
unsafe {
|
||||
PICS.lock()
|
||||
|
||||
@ -12,7 +12,6 @@
|
||||
extern crate alloc;
|
||||
|
||||
use core::panic::PanicInfo;
|
||||
use linked_list_allocator::LockedHeap;
|
||||
|
||||
#[cfg(test)]
|
||||
use bootloader::{entry_point, BootInfo};
|
||||
@ -20,9 +19,6 @@ use bootloader::{entry_point, BootInfo};
|
||||
#[cfg(test)]
|
||||
entry_point!(test_kernel_main);
|
||||
|
||||
// #[global_allocator]
|
||||
// static ALLOCATOR: LockedHeap = LockedHeap::empty();
|
||||
|
||||
#[alloc_error_handler]
|
||||
fn alloc_error_handler(layout: alloc::alloc::Layout) -> ! {
|
||||
panic!("allocation error: {:?}", layout)
|
||||
@ -34,6 +30,7 @@ pub mod interrupts;
|
||||
pub mod macros;
|
||||
pub mod memory;
|
||||
pub mod serial;
|
||||
pub mod task;
|
||||
pub mod vga_buffer;
|
||||
|
||||
pub fn test_runner(tests: &[&dyn Fn()]) {
|
||||
|
||||
15
src/main.rs
15
src/main.rs
@ -10,6 +10,7 @@ use alloc::{boxed::Box, rc::Rc, vec, vec::Vec};
|
||||
use core::panic::PanicInfo;
|
||||
|
||||
use blog_os::println;
|
||||
use blog_os::task::{keyboard, Task, simple_executor::SimpleExecutor};
|
||||
use bootloader::{entry_point, BootInfo};
|
||||
|
||||
/// This function is called on panic.
|
||||
@ -65,9 +66,23 @@ fn kernel_main(boot_info: &'static BootInfo) -> ! {
|
||||
Rc::strong_count(&cloned_reference)
|
||||
);
|
||||
|
||||
let mut executor = SimpleExecutor::new();
|
||||
executor.spawn(Task::new(example_task()));
|
||||
executor.spawn(Task::new(keyboard::print_keypresses()));
|
||||
executor.run();
|
||||
|
||||
#[cfg(test)]
|
||||
test_main();
|
||||
|
||||
println!("It did not crash!");
|
||||
blog_os::hlt_loop();
|
||||
}
|
||||
|
||||
async fn async_number() -> u32 {
|
||||
42
|
||||
}
|
||||
|
||||
async fn example_task() {
|
||||
let number = async_number().await;
|
||||
println!("async number: {}", number);
|
||||
}
|
||||
|
||||
116
src/memory.rs
116
src/memory.rs
@ -2,63 +2,12 @@ use bootloader::bootinfo::{MemoryMap, MemoryRegionType};
|
||||
use x86_64::{
|
||||
structures::paging::{
|
||||
FrameAllocator, Mapper, OffsetPageTable, Page, PageTable, PhysFrame, Size4KiB,
|
||||
UnusedPhysFrame,
|
||||
},
|
||||
PhysAddr, VirtAddr,
|
||||
};
|
||||
|
||||
/// A FrameAllocator that always returns `None`.
|
||||
pub struct EmptyFrameAllocator;
|
||||
|
||||
unsafe impl FrameAllocator<Size4KiB> for EmptyFrameAllocator {
|
||||
fn allocate_frame(&mut self) -> Option<PhysFrame> {
|
||||
None
|
||||
}
|
||||
}
|
||||
|
||||
pub struct BootInfoFrameAllocator {
|
||||
memory_map: &'static MemoryMap,
|
||||
next: usize,
|
||||
}
|
||||
|
||||
impl BootInfoFrameAllocator {
|
||||
/// Create a FrameAllocator from the passed memory map.
|
||||
///
|
||||
/// This function is unsafe because the caller must guarantee that the passed
|
||||
/// meory map is valid. The main requirement is that all frame are marked
|
||||
/// as `USABLE` in it are really unused.
|
||||
pub unsafe fn init(memory_map: &'static MemoryMap) -> Self {
|
||||
BootInfoFrameAllocator {
|
||||
memory_map,
|
||||
next: 0,
|
||||
}
|
||||
}
|
||||
|
||||
/// Returns an iterator over the usable frames specified in the memory map.
|
||||
fn usable_frames(&self) -> impl Iterator<Item = PhysFrame> {
|
||||
// get usable regions from memory map
|
||||
let regions = self.memory_map.iter();
|
||||
let usable_regions = regions.filter(|r| r.region_type == MemoryRegionType::Usable);
|
||||
|
||||
// map each region to its address range
|
||||
let addr_ranges = usable_regions.map(|r| r.range.start_addr()..r.range.end_addr());
|
||||
|
||||
// transform to an iterator of frame start addresses
|
||||
let frame_addresses = addr_ranges.flat_map(|r| r.step_by(4096));
|
||||
|
||||
// create `PhysFrame` types from the start addresses
|
||||
frame_addresses.map(|addr| PhysFrame::containing_address(PhysAddr::new(addr)))
|
||||
}
|
||||
}
|
||||
|
||||
unsafe impl FrameAllocator<Size4KiB> for BootInfoFrameAllocator {
|
||||
fn allocate_frame(&mut self) -> Option<PhysFrame> {
|
||||
let frame = self.usable_frames().nth(self.next);
|
||||
self.next += 1;
|
||||
frame
|
||||
}
|
||||
}
|
||||
|
||||
/// Initialize a new OffsetPageTable
|
||||
/// Initialize a new OffsetPageTable.
|
||||
///
|
||||
/// This function is unsafe because the caller must guarantee that the
|
||||
/// complete physical memory is mapped to virtual memory at the passed
|
||||
@ -84,10 +33,10 @@ unsafe fn active_level_4_table(physical_memory_offset: VirtAddr) -> &'static mut
|
||||
let virt = physical_memory_offset + phys.as_u64();
|
||||
let page_table_ptr: *mut PageTable = virt.as_mut_ptr();
|
||||
|
||||
&mut *page_table_ptr
|
||||
&mut *page_table_ptr // unsafe
|
||||
}
|
||||
|
||||
/// Creates an example maping for the given page to frame `0xb8000`
|
||||
/// Creates an example mapping for the given page to frame `0xb8000`.
|
||||
pub fn create_example_mapping(
|
||||
page: Page,
|
||||
mapper: &mut OffsetPageTable,
|
||||
@ -96,9 +45,62 @@ pub fn create_example_mapping(
|
||||
use x86_64::structures::paging::PageTableFlags as Flags;
|
||||
|
||||
let frame = PhysFrame::containing_address(PhysAddr::new(0xb8000));
|
||||
// FIXME: ONLY FOR TEMPORARY TESTING
|
||||
let unused_frame = unsafe { UnusedPhysFrame::new(frame) };
|
||||
let flags = Flags::PRESENT | Flags::WRITABLE;
|
||||
|
||||
let map_to_result = unsafe { mapper.map_to(page, frame, flags, frame_allocator) };
|
||||
|
||||
let map_to_result = mapper.map_to(page, unused_frame, flags, frame_allocator);
|
||||
map_to_result.expect("map_to failed").flush();
|
||||
}
|
||||
|
||||
/// A FrameAllocator that always returns `None`.
|
||||
pub struct EmptyFrameAllocator;
|
||||
|
||||
unsafe impl FrameAllocator<Size4KiB> for EmptyFrameAllocator {
|
||||
fn allocate_frame(&mut self) -> Option<UnusedPhysFrame> {
|
||||
None
|
||||
}
|
||||
}
|
||||
|
||||
/// A FrameAllocator that returns usable frames from the bootloader's memory map.
|
||||
pub struct BootInfoFrameAllocator {
|
||||
memory_map: &'static MemoryMap,
|
||||
next: usize,
|
||||
}
|
||||
|
||||
impl BootInfoFrameAllocator {
|
||||
/// Create a FrameAllocator from the passed memory map.
|
||||
///
|
||||
/// This function is unsafe because the caller must guarantee that the passed
|
||||
/// memory map is valid. The main requirement is that all frames that are marked
|
||||
/// as `USABLE` in it are really unused.
|
||||
pub unsafe fn init(memory_map: &'static MemoryMap) -> Self {
|
||||
BootInfoFrameAllocator {
|
||||
memory_map,
|
||||
next: 0,
|
||||
}
|
||||
}
|
||||
|
||||
/// Returns an iterator over the usable frames specified in the memory map.
|
||||
fn usable_frames(&self) -> impl Iterator<Item = UnusedPhysFrame> {
|
||||
// get usable regions from memory map
|
||||
let regions = self.memory_map.iter();
|
||||
let usable_regions = regions.filter(|r| r.region_type == MemoryRegionType::Usable);
|
||||
// map each region to its address range
|
||||
let addr_ranges = usable_regions.map(|r| r.range.start_addr()..r.range.end_addr());
|
||||
// transform to an iterator of frame start addresses
|
||||
let frame_addresses = addr_ranges.flat_map(|r| r.step_by(4096));
|
||||
// create `PhysFrame` types from the start addresses
|
||||
let frames = frame_addresses.map(|addr| PhysFrame::containing_address(PhysAddr::new(addr)));
|
||||
// we know that the frames are really unused
|
||||
frames.map(|f| unsafe { UnusedPhysFrame::new(f) })
|
||||
}
|
||||
}
|
||||
|
||||
unsafe impl FrameAllocator<Size4KiB> for BootInfoFrameAllocator {
|
||||
fn allocate_frame(&mut self) -> Option<UnusedPhysFrame> {
|
||||
let frame = self.usable_frames().nth(self.next);
|
||||
self.next += 1;
|
||||
frame
|
||||
}
|
||||
}
|
||||
|
||||
35
src/task.rs
Normal file
35
src/task.rs
Normal file
@ -0,0 +1,35 @@
|
||||
use core::{future::Future, pin::Pin};
|
||||
use core::sync::atomic::{AtomicU64, Ordering};
|
||||
use core::task::{Context, Poll};
|
||||
use alloc::boxed::Box;
|
||||
|
||||
pub mod keyboard;
|
||||
pub mod simple_executor;
|
||||
|
||||
#[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord)]
|
||||
struct TaskId(u64);
|
||||
|
||||
impl TaskId {
|
||||
fn new() -> Self {
|
||||
static NEXT_ID: AtomicU64 = AtomicU64::new(0);
|
||||
TaskId(NEXT_ID.fetch_add(1, Ordering::Relaxed))
|
||||
}
|
||||
}
|
||||
|
||||
pub struct Task {
|
||||
id: TaskId,
|
||||
future: Pin<Box<dyn Future<Output = ()>>>,
|
||||
}
|
||||
|
||||
impl Task {
|
||||
pub fn new(future: impl Future<Output = ()> + 'static) -> Task {
|
||||
Task {
|
||||
id: TaskId::new(),
|
||||
future: Box::pin(future),
|
||||
}
|
||||
}
|
||||
|
||||
fn poll(&mut self, context: &mut Context) -> Poll<()> {
|
||||
self.future.as_mut().poll(context)
|
||||
}
|
||||
}
|
||||
81
src/task/keyboard.rs
Normal file
81
src/task/keyboard.rs
Normal file
@ -0,0 +1,81 @@
|
||||
use conquer_once::spin::OnceCell;
|
||||
use core::{pin::Pin, task::{Poll, Context}};
|
||||
use crossbeam_queue::ArrayQueue;
|
||||
use futures_util::task::AtomicWaker;
|
||||
use futures_util::stream::{Stream, StreamExt};
|
||||
use pc_keyboard::{layouts, DecodedKey, HandleControl, Keyboard, ScancodeSet1};
|
||||
|
||||
use crate::{print, println};
|
||||
|
||||
static SCANCODE_QUEUE: OnceCell<ArrayQueue<u8>> = OnceCell::uninit();
|
||||
static WAKER: AtomicWaker = AtomicWaker::new();
|
||||
|
||||
/// Called by the keyboard interrupt handler
|
||||
///
|
||||
/// Must not block or allocate.
|
||||
pub(crate) fn add_scancode(scancode: u8) {
|
||||
if let Ok(queue) = SCANCODE_QUEUE.try_get() {
|
||||
if let Err(_) = queue.push(scancode) {
|
||||
println!("WARNING: scancode queue full; dropping keyboard input");
|
||||
} else {
|
||||
WAKER.wake();
|
||||
}
|
||||
} else {
|
||||
println!("WARNING: scancode queue uninitialized");
|
||||
}
|
||||
}
|
||||
|
||||
pub async fn print_keypresses() {
|
||||
let mut scancodes = ScancodeStream::new();
|
||||
let mut keyboard = Keyboard::new(layouts::Us104Key, ScancodeSet1, HandleControl::Ignore);
|
||||
|
||||
while let Some(scancode) = scancodes.next().await {
|
||||
if let Ok(Some(key_event)) = keyboard.add_byte(scancode) {
|
||||
if let Some(key) = keyboard.process_keyevent(key_event) {
|
||||
match key {
|
||||
DecodedKey::Unicode(character) => print!("{}", character),
|
||||
DecodedKey::RawKey(key) => print!("{:?}", key),
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
pub struct ScancodeStream {
|
||||
_private: (),
|
||||
}
|
||||
|
||||
impl ScancodeStream {
|
||||
pub fn new() -> Self {
|
||||
SCANCODE_QUEUE.try_init_once(|| ArrayQueue::new(100))
|
||||
.expect("ScancodeStream::new should only be called once");
|
||||
|
||||
ScancodeStream {
|
||||
_private: ()
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
impl Stream for ScancodeStream {
|
||||
type Item = u8;
|
||||
|
||||
fn poll_next(self: Pin<&mut Self>, cx: &mut Context) -> Poll<Option<u8>> {
|
||||
let queue = SCANCODE_QUEUE
|
||||
.try_get()
|
||||
.expect("not initialized");
|
||||
|
||||
// fast path
|
||||
if let Ok(scancode) = queue.pop() {
|
||||
return Poll::Ready(Some(scancode));
|
||||
}
|
||||
|
||||
WAKER.register(&cx.waker());
|
||||
match queue.pop() {
|
||||
Ok(scancode) => {
|
||||
WAKER.take();
|
||||
Poll::Ready(Some(scancode))
|
||||
},
|
||||
Err(crossbeam_queue::PopError) => Poll::Pending,
|
||||
}
|
||||
}
|
||||
}
|
||||
44
src/task/simple_executor.rs
Normal file
44
src/task/simple_executor.rs
Normal file
@ -0,0 +1,44 @@
|
||||
use super::Task;
|
||||
use alloc::collections::VecDeque;
|
||||
use core::task::{Context, Poll, Waker, RawWaker, RawWakerVTable};
|
||||
|
||||
pub struct SimpleExecutor {
|
||||
task_queue: VecDeque<Task>,
|
||||
}
|
||||
|
||||
impl SimpleExecutor {
|
||||
pub fn new() -> SimpleExecutor {
|
||||
SimpleExecutor {
|
||||
task_queue: VecDeque::new(),
|
||||
}
|
||||
}
|
||||
|
||||
pub fn spawn(&mut self, task: Task) {
|
||||
self.task_queue.push_back(task)
|
||||
}
|
||||
|
||||
pub fn run(&mut self) {
|
||||
while let Some(mut task) = self.task_queue.pop_front() {
|
||||
let waker = dummy_waker();
|
||||
let mut context = Context::from_waker(&waker);
|
||||
match task.poll(&mut context) {
|
||||
Poll::Ready(()) => {} // task done
|
||||
Poll::Pending => self.task_queue.push_back(task),
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
fn dummy_raw_waker() -> RawWaker {
|
||||
fn no_op(_: *const ()) {}
|
||||
fn clone(_: *const ()) -> RawWaker {
|
||||
dummy_raw_waker()
|
||||
}
|
||||
|
||||
let vtable = &RawWakerVTable::new(clone, no_op, no_op, no_op);
|
||||
RawWaker::new(0 as *const (), vtable)
|
||||
}
|
||||
|
||||
fn dummy_waker() -> Waker {
|
||||
unsafe { Waker::from_raw(dummy_raw_waker()) }
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user