1use std::sync::Arc;
2
3use crate::Location;
4use crate::trace_resources;
5
6use super::{ ResourceEntry, ResourceManagerNotify };
7
8pub struct ResourceLockGuard {
9 pub(super) managed: Vec<ResourceEntry>,
10 pub(super) owner: Location,
11 pub(super) notify: Arc<ResourceManagerNotify>,
12}
13
14impl std::ops::Drop for ResourceLockGuard {
15 fn drop(&mut self) {
16 trace_resources!("dropping {:?}", self.owner);
17 self.release();
18 }
19}
20
21impl ResourceLockGuard {
22 fn release(&mut self) {
23 let mut changed = false;
24
25 for m in &self.managed {
26 let mut entry = m.write().unwrap();
27
28 if Some(&self.owner) == entry.owner.as_ref() {
29 trace_resources!(" releasing owned {:?}", entry.id);
30 entry.owner = None;
31 changed = true;
32 }
33
34 changed |= entry.users.remove(&self.owner);
35
36 trace_resources!(" entry {:?} used by {:?}", entry.id, entry.users);
37 }
38
39 self.managed.clear();
40
41 if changed {
42 self.notify.notify();
43 }
44 }
45}