forked from koniifer/ableos
96 lines
2.4 KiB
Rust
96 lines
2.4 KiB
Rust
/*
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* Copyright (c) 2022, Umut İnan Erdoğan <umutinanerdogan@pm.me>
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*
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* SPDX-License-Identifier: MPL-2.0
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*/
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use alloc::sync::Arc;
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use hashbrown::HashMap;
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use spin::Lazy;
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use crate::{
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filesystem::{vfs::FsNode, StorageDevice},
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handle::{Handle, HandleResource},
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};
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pub static KERNEL_STATE: Lazy<spin::Mutex<KernelInternalState>> =
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Lazy::new(|| spin::Mutex::new(KernelInternalState::new()));
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pub struct KernelInternalState {
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pub hostname: String,
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pub storage_devices: HashMap<Handle, Box<dyn StorageDevice>>,
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// FIXME: should this be per-process?
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file_table: HashMap<Handle, FileTableEntry>,
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should_shutdown: bool,
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}
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impl KernelInternalState {
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pub fn new() -> Self {
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Self {
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should_shutdown: false,
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storage_devices: HashMap::new(),
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file_table: HashMap::new(),
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hostname: "".to_string(),
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}
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}
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pub fn set_hostname(&mut self, hostname: String) {
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self.hostname = hostname;
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}
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pub fn add_storage_device(&mut self, device: impl StorageDevice + Send + 'static) {
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let device = Box::new(device);
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self.storage_devices.insert(device.device_handle(), device);
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}
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pub fn storage_device(&self, handle: Handle) -> Option<&dyn StorageDevice> {
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self.storage_devices.get(&handle).map(|d| &**d)
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}
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// TODO: implement flags here
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pub fn open_file_descriptor(&mut self, fs_node: Arc<FsNode>) -> Handle {
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let handle = Handle::new(HandleResource::FileDescriptor);
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self.file_table.insert(handle, FileTableEntry::new(fs_node));
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handle
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}
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pub fn file_descriptor(&self, handle: Handle) -> Option<&FileTableEntry> {
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self.file_table.get(&handle)
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}
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pub fn close_file_descriptor(&mut self, handle: Handle) {
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self.file_table.remove(&handle);
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}
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pub fn shutdown(&mut self) {
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self.should_shutdown = true;
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}
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pub fn update_state(&mut self) {
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if self.should_shutdown {
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crate::arch::shutdown();
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}
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}
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}
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impl Default for KernelInternalState {
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fn default() -> Self {
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Self::new()
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}
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}
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pub struct FileTableEntry {
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fs_node: Arc<FsNode>,
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// TODO: permissions, flags, owner, maybe cache stuff here?
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}
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impl FileTableEntry {
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fn new(fs_node: Arc<FsNode>) -> Self {
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Self { fs_node }
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}
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pub fn fs_node(&self) -> Arc<FsNode> {
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self.fs_node.clone()
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}
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}
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