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< > BotCompany Repo | #1000915 // Flag - boolean variable that stays true after being set true (thread-safe)

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

Transpiled version (112L) is out of date.

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sclass Flag is Runnable {
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  private volatile boolean up;
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  /** returns true if flag was down before (i.e. flag was actually raised right now) */
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  public bool raise() {
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    if (up) false;
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    synchronized {
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      if (up) false;
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      up = true;
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      notifyAll();
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      true;
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    }
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  }
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  run { raise(); }
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  public void waitUntilUp() ctex {
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    if (up) ret;
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    synchronized {
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      while (!up) wait();
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    }
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  }
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  public bool waitUntilUp(double timeout) {
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    if (timeout == infinity()) {
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      waitUntilUp();
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      ret isUp();
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    } else
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      ret waitUntilUp(toMS(timeout));
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  }
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  public bool waitUntilUp(long timeout) ctex {
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    if (up) ret true;
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    synchronized {
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      if (!up)
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        wait(timeout);
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    }
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    ret isUp();
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  }
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  public bool isUp aka get() { ret up; }
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  toString { ret isUp() ? "up" : "down"; }
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}

Author comment

Began life as a copy of #1000782

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Snippet ID: #1000915
Snippet name: Flag - boolean variable that stays true after being set true (thread-safe)
Eternal ID of this version: #1000915/16
Text MD5: 787466a4713d99bbdfad30f05787c445
Author: stefan
Category:
Type: JavaX fragment (include)
Public (visible to everyone): Yes
Archived (hidden from active list): No
Created/modified: 2022-06-20 21:37:04
Source code size: 872 bytes / 44 lines
Pitched / IR pitched: No / No
Views / Downloads: 689 / 9072
Version history: 15 change(s)
Referenced in: [show references]