sfw.cycll source code

1 /// cycle call
2 module sfw.cycll;
3 
4 import std.datetime;
5 import std.exception : enforce;
6 
7 /++ For cases when can't use async methods and whey must
8     calls every N hnsecs, but strictly sync
9  +/
10 struct CyCll
11 {
12     /// returns step for next call
13     Duration delegate() func;
14     /// next std time for call
15     long next = 0;
16 
17     ///
18     this(Duration delegate() func)
19     { this.func = enforce(func, "bodyfunc is null"); }
20 
21     /// if time is up call func, set next and return true
22     bool opCall()
23     {
24         if (now < next) return false;
25         next = now + func().total!"hnsecs";
26         return true;
27     }
28 
29     ///
30     static auto now() @property { return Clock.currStdTime; }
31 }