QPool [dev.] [1033405]

< > BotCompany Repo | #1033405 // QPool [dev.]

JavaX fragment (include)

sclass QPool {
  replace Q with CompactQ.
  
  int max = numberOfCores();
  new SelfNotifyingSet<Q> used;
  new SelfNotifyingSet<Q> free;
  
  synchronized int total() { ret l(used)+l(free); }
  synchronized bool nonFree() { ret empty(free) && max < total(); }
  
  event customerMustWaitAlert;
  
  void fireCustomerMustWaitAlert {
    vmBus_send customerMustWaitAlert(this, currentQ());
    customerMustWaitAlert();
  }
  
  synchronized WithAutoCloseable<Q> acquireQ() {
    if (nonFree())
      fireCustomerMustWaitAlert();
    if (total() < max)
      used.add(newQ());
    sleepWhileEmpty(free);
    Q t = assertNotNull(popFirst(free));
    used.add(t);
    ret withAutoCloseable(-> giveQBack(t), t);
  }
  
  synchronized void giveQBack(Q t) {
    used.remove(t);
    free.add(t);
  }
  
  static Q newQ() {
    ret new Q("Q Pool Inhabitant " + n2(total()+1)) {
      
    };
  }
}

Author comment

Began life as a copy of #1033401

Travelled to 3 computer(s): bhatertpkbcr, mowyntqkapby, mqqgnosmbjvj

Snippet ID:

#1033405

Snippet name:

QPool [dev.]

Eternal ID of this version:

#1033405/1

Text MD5:

ff103aa802d330a34b083b3de55a3252

Author:

stefan

Category:

javax / code execution

Type:

JavaX fragment (include)

Public (visible to everyone):

Yes

Archived (hidden from active list):

Created/modified:

2021-10-27 04:45:06

Source code size:

926 bytes / 39 lines

Pitched / IR pitched:

No / No

Views / Downloads:

344 / 365

Referenced in:

[show references]

1	sclass QPool {
2	replace Q with CompactQ.
3
4	int max = numberOfCores();
5	new SelfNotifyingSet<Q> used;
6	new SelfNotifyingSet<Q> free;
7
8	synchronized int total() { ret l(used)+l(free); }
9	synchronized bool nonFree() { ret empty(free) && max < total(); }
10
11	event customerMustWaitAlert;
12
13	void fireCustomerMustWaitAlert {
14	vmBus_send customerMustWaitAlert(this, currentQ());
15	customerMustWaitAlert();
16	}
17
18	synchronized WithAutoCloseable<Q> acquireQ() {
19	if (nonFree())
20	fireCustomerMustWaitAlert();
21	if (total() < max)
22	used.add(newQ());
23	sleepWhileEmpty(free);
24	Q t = assertNotNull(popFirst(free));
25	used.add(t);
26	ret withAutoCloseable(-> giveQBack(t), t);
27	}
28
29	synchronized void giveQBack(Q t) {
30	used.remove(t);
31	free.add(t);
32	}
33
34	static Q newQ() {
35	ret new Q("Q Pool Inhabitant " + n2(total()+1)) {
36
37	};
38	}
39	}