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|
use anyhow::Result;
use crossterm::event::{self, Event, KeyCode, KeyModifiers};
use std::{
sync::{
atomic::{AtomicBool, AtomicU64, Ordering},
Arc,
},
time::Duration,
};
pub type AbortSignal = Arc<AbortSignalInner>;
#[derive(Debug, Default)]
pub struct QueryIdGen {
counter: AtomicU64,
parents: parking_lot::RwLock<std::collections::HashMap<String, u64>>,
}
impl QueryIdGen {
pub fn root_id(&self) -> u64 {
self.counter.fetch_add(1, Ordering::SeqCst)
}
pub fn child_id(&self, parent_path: &[u64]) -> u64 {
if parent_path.is_empty() {
return self.root_id();
}
let key = parent_path
.iter()
.map(|v| v.to_string())
.collect::<Vec<_>>()
.join("/");
let mut parents = self.parents.write();
let entry = parents.entry(key).or_insert(0);
let id = *entry;
*entry += 1;
id
}
}
pub fn format_query_path(path: &[u64]) -> String {
if path.is_empty() {
return String::new();
}
format!(
"[{}]",
path.iter()
.map(|v| v.to_string())
.collect::<Vec<_>>()
.join("/")
)
}
tokio::task_local! {
static QUERY_SCOPE: String;
static QUERY_ID_GEN: QueryIdGen;
}
pub fn current_query_scope() -> Option<String> {
QUERY_SCOPE
.try_with(|v| if v.is_empty() { None } else { Some(v.clone()) })
.ok()
.flatten()
}
pub async fn with_query_scope<F: std::future::Future>(scope: String, future: F) -> F::Output {
QUERY_SCOPE.scope(scope, future).await
}
pub fn next_query_id(parent_path: &[u64]) -> u64 {
if parent_path.is_empty() {
return QUERY_ID_GEN.try_with(|g| g.root_id()).unwrap_or(0);
}
QUERY_ID_GEN
.try_with(|g| g.child_id(parent_path))
.unwrap_or(0)
}
pub struct AbortSignalInner {
ctrlc: AtomicBool,
ctrld: AtomicBool,
}
pub fn create_abort_signal() -> AbortSignal {
AbortSignalInner::new()
}
impl AbortSignalInner {
pub fn new() -> AbortSignal {
Arc::new(Self {
ctrlc: AtomicBool::new(false),
ctrld: AtomicBool::new(false),
})
}
pub fn aborted(&self) -> bool {
if self.aborted_ctrlc() {
return true;
}
if self.aborted_ctrld() {
return true;
}
false
}
pub fn aborted_ctrlc(&self) -> bool {
self.ctrlc.load(Ordering::SeqCst)
}
pub fn aborted_ctrld(&self) -> bool {
self.ctrld.load(Ordering::SeqCst)
}
pub fn reset(&self) {
self.ctrlc.store(false, Ordering::SeqCst);
self.ctrld.store(false, Ordering::SeqCst);
}
pub fn set_ctrlc(&self) {
self.ctrlc.store(true, Ordering::SeqCst);
}
pub fn set_ctrld(&self) {
self.ctrld.store(true, Ordering::SeqCst);
}
}
pub async fn wait_abort_signal(abort_signal: &AbortSignal) {
loop {
if abort_signal.aborted() {
break;
}
tokio::time::sleep(std::time::Duration::from_millis(25)).await;
}
}
pub fn poll_abort_signal(abort_signal: &AbortSignal) -> Result<bool> {
if crossterm::event::poll(Duration::from_millis(25))? {
if let Event::Key(key) = event::read()? {
match key.code {
KeyCode::Char('c') if key.modifiers == KeyModifiers::CONTROL => {
abort_signal.set_ctrlc();
return Ok(true);
}
KeyCode::Char('d') if key.modifiers == KeyModifiers::CONTROL => {
abort_signal.set_ctrld();
return Ok(true);
}
_ => {}
}
}
}
Ok(false)
}
|
