crates/rust-analyzer/src/op_queue.rs

   1 //! Bookkeeping to make sure only one long-running operation is executed.
   2
   3 #[derive(Default)]
   4 pub(crate) struct OpQueue {
   5     op_scheduled: bool,
   6     op_in_progress: bool,
   7 }
   8
   9 impl OpQueue {
  10     pub(crate) fn request_op(&mut self) {
  11         self.op_scheduled = true;
  12     }
  13     pub(crate) fn should_start_op(&mut self) -> bool {
  14         if !self.op_in_progress && self.op_scheduled {
  15             self.op_in_progress = true;
  16             self.op_scheduled = false;
  17             return true;
  18         }
  19         false
  20     }
  21     pub(crate) fn op_completed(&mut self) {
  22         assert!(self.op_in_progress);
  23         self.op_in_progress = false;
  24     }
  25 }