50 lines
1.4 KiB
Rust
50 lines
1.4 KiB
Rust
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//! Burritos stores a data structure associating object ids with
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//! their references. The ObjAddr struct
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//! allows to maintain this data structure.
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use std::collections::HashMap;
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pub trait SynchObj { }
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/// Brief Definition of object identifiers:
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///
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/// The struct stores the list of created objects (Semaphore, Lock, ...) and for each of them
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/// associates an object identifier than can be passed to subsequent
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/// system calls on the object.
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///
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/// A method allows to detect of an object corresponding to a given
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/// identifier exists; this is used to check the parameters of system
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/// calls.
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struct ObjAddr<'a> {
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last_id: i32,
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map: HashMap<i32, &'a dyn SynchObj>
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}
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impl<'a> ObjAddr<'a> {
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/// Initializes and returns a ObjAddr struct
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pub fn init() -> Self {
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Self {
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last_id: 3,
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map: HashMap::<i32, &dyn SynchObj>::new()
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}
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}
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/// Adds the **obj** SynchObj to self
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pub fn add_object(&mut self, obj: &'a dyn SynchObj) -> i32 {
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self.last_id = self.last_id + 1;
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self.map.insert(self.last_id, obj);
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self.last_id
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}
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/// Searches for an object of id **id** in self
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pub fn search_object(&self, id: i32) -> Option<&& dyn SynchObj> {
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self.map.get(&id)
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}
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/// Removes the object of id **id** from self if it exists
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pub fn remove_object_from_key(&mut self, id: i32) {
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self.map.remove(&id);
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}
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}
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