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D parallel and rotator

2022-06-29 04:50:00 【fqbqrr】

       
        import std.stdio;
        
import std.concurrency;
        
import core.thread;
        

        
void main() {
        
  spawnLinked(&spinner, 100.msecs);
        
  enum n = 45;
        
  const fibN = fib(n); // slow
        
  writefln!"\rFibonacci(%d) = %d"(n, fibN);
        
}
        

        
void spinner(const(Duration) delay) {
        
  for (;;) {
        
    foreach (r; `-\|/`) {
        
      writef!"\r%c"(r);
        
      stdout.flush();
        
      bool done;
        
      receiveTimeout(delay,
        
                     (OwnerTerminated msg) {
        
                       done = true;
        
                     });
        
      if (done) {
        
        return;
        
      }
        
    }
        
  }
        
}
        

        
auto fib(int x) {
        
  if (x < 2) {
        
    return x;
        
  }
        
  return fib(x-1) + fib(x-2);
        
}
       
       
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D parallel Fib. Check the return value :

       
        if (receiveTimeout(delay, (OwnerTerminated msg) {})) {
        
        return;
        
      }
       
       
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本文为[fqbqrr]所创，转载请带上原文链接，感谢
https://yzsam.com/2022/02/202202161026481054.html

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