WaitForStableValue [1015867]

< > BotCompany Repo | #1015867 // WaitForStableValue

JavaX fragment (include) [tags: use-pretranspiled]

sclass WaitForStableValue<A> {
  long period;
  A value;
  long valueSince;
  
  *() {}
  *(long *period) {}
  *(double seconds) { period = toMS(seconds); }
  
  synchronized A set(A a) {
    if (neq(a, value)) {
      value = a;
      valueSince = sysNow();
    }
    ret get();
  }
  
  synchronized A get() {
    ret valueSince != 0 && sysNow() >= valueSince+period ? value : null;
  }
  
  // clears only if result != null
  synchronized A setAndClear(A _a) {
    A a = set(_a);
    if (a != null) clear();
    ret a;
  }
  
  public bool has() { ret get() != null; }
  
  void clear() { set(null); }
}

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Snippet ID:

#1015867

Snippet name:

WaitForStableValue

Eternal ID of this version:

#1015867/10

Text MD5:

4a2f2833a3082543bb64d1c8470f5d83

Transpilation MD5:

09ef5f028d4bc0ea2d298b033edc7915

Author:

stefan

Category:

javax

Type:

JavaX fragment (include)

Public (visible to everyone):

Yes

Archived (hidden from active list):

Created/modified:

2019-09-01 19:06:50

Source code size:

637 bytes / 32 lines

Pitched / IR pitched:

No / No

Views / Downloads:

289 / 917

Version history:

9 change(s)

Referenced in:

[show references]

1	sclass WaitForStableValue<A> {
2	long period;
3	A value;
4	long valueSince;
5
6	*() {}
7	(long period) {}
8	*(double seconds) { period = toMS(seconds); }
9
10	synchronized A set(A a) {
11	if (neq(a, value)) {
12	value = a;
13	valueSince = sysNow();
14	}
15	ret get();
16	}
17
18	synchronized A get() {
19	ret valueSince != 0 && sysNow() >= valueSince+period ? value : null;
20	}
21
22	// clears only if result != null
23	synchronized A setAndClear(A _a) {
24	A a = set(_a);
25	if (a != null) clear();
26	ret a;
27	}
28
29	public bool has() { ret get() != null; }
30
31	void clear() { set(null); }
32	}