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use core::time::Duration;
use std::{
collections::HashMap,
panic,
sync::mpsc::{channel, sync_channel, RecvTimeoutError},
thread::spawn,
};
use crate::{
callback::{Callback, CallbackInfo, CallbackType},
handler::{builder::Builder, HandleError, Handler},
register::RegisterType,
};
//
impl Handler {
pub fn handle(self) -> Result<(), HandleError> {
let Builder {
callbacks,
registers,
} = self.builder;
if callbacks.has_async() {
return Err(HandleError::AsyncRequired);
}
//
//
//
let (register_tx, register_rx) = sync_channel::<RegisterType>(6);
let _sig_id_map = registers
.register(register_tx)
.map_err(HandleError::RegisterFailed)?;
//
//
//
let mut initialized_cb = None;
let mut wait_for_stop_cb = None;
let mut callback_tx_map = HashMap::new();
let mut callback_join_handle_map = HashMap::new();
for (tp, cb) in callbacks.into_inner() {
match tp {
CallbackType::Initialized => {
initialized_cb = Some(cb);
continue;
}
CallbackType::ReloadConfig => {}
CallbackType::WaitForStop => {
wait_for_stop_cb = Some(cb);
continue;
}
CallbackType::PrintStats => {}
}
let (tx, rx) = channel::<CallbackInfo>();
let join_handle = spawn(move || {
let mut latest_finish_time = None;
loop {
match rx.recv_timeout(Duration::from_secs(1)) {
Ok(info) => {
if let Some(latest_finish_time) = latest_finish_time {
if latest_finish_time > *info.time() {
continue;
}
}
match &cb {
Callback::Sync(cb) => cb(info),
Callback::Async(_) => unreachable!(),
}
latest_finish_time = Some(CallbackInfo::time_now());
}
Err(RecvTimeoutError::Timeout) => {
continue;
}
Err(RecvTimeoutError::Disconnected) => {
break;
}
}
}
});
callback_tx_map.insert(tp, tx);
callback_join_handle_map.insert(tp, join_handle);
}
//
//
//
if let Some(cb) = initialized_cb {
match &cb {
Callback::Sync(cb) => cb(CallbackInfo::new()),
Callback::Async(_) => unreachable!(),
}
}
//
//
//
loop {
match register_rx.recv_timeout(Duration::from_secs(1)) {
#[cfg(not(windows))]
Ok(RegisterType::ReloadConfig) => {
if let Some(tx_callback) = callback_tx_map.get(&CallbackType::ReloadConfig) {
#[allow(clippy::single_match)]
match tx_callback.send(CallbackInfo::new()) {
Ok(_) => {}
Err(_) => {
// Ignore, disconnected
}
}
}
continue;
}
Ok(RegisterType::WaitForStop) => {
if let Some(cb) = wait_for_stop_cb {
match &cb {
Callback::Sync(cb) => cb(CallbackInfo::new()),
Callback::Async(_) => unreachable!(),
}
}
drop(register_rx);
break;
}
#[cfg(not(windows))]
Ok(RegisterType::PrintStats) => {
if let Some(tx_callback) = callback_tx_map.get(&CallbackType::PrintStats) {
#[allow(clippy::single_match)]
match tx_callback.send(CallbackInfo::new()) {
Ok(_) => {}
Err(_) => {
// Ignore, disconnected
}
}
}
continue;
}
Err(RecvTimeoutError::Timeout) => {
continue;
}
Err(RecvTimeoutError::Disconnected) => break,
}
}
//
//
//
for (_, tx) in callback_tx_map {
drop(tx);
}
for (_, join_handle) in callback_join_handle_map {
match join_handle.join() {
Ok(_) => {}
Err(err) => {
panic::resume_unwind(err);
}
}
}
Ok(())
}
}