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use ::std::collections::VecDeque;
use ::std::net::Ipv4Addr;
use ::std::sync::{Condvar, Mutex};
pub struct DnsQueue {
jobs: Mutex<VecDeque<Option<Ipv4Addr>>>,
cvar: Condvar,
}
impl DnsQueue {
pub fn new() -> Self {
DnsQueue {
jobs: Mutex::new(VecDeque::new()),
cvar: Condvar::new(),
}
}
}
impl DnsQueue {
pub fn resolve_ips(&self, unresolved_ips: Vec<Ipv4Addr>) {
let mut queue = self.jobs.lock().unwrap();
for ip in unresolved_ips {
queue.push_back(Some(ip))
}
self.cvar.notify_all();
}
pub fn wait_for_job(&self) -> Option<Ipv4Addr> {
let mut jobs = self.jobs.lock().unwrap();
loop {
match jobs.pop_front() {
Some(job) => return job,
None => {
jobs = self.cvar.wait(jobs).unwrap();
}
}
}
}
pub fn end(&self) {
let mut jobs = self.jobs.lock().unwrap();
jobs.clear();
jobs.push_back(None);
self.cvar.notify_all();
}
}
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