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setOnIOWaitExitCallback

Note

This is a point-in-time snapshot of the API documentation from January 2026. Going forward, we will not be maintaining a public copy of these references, and recommend users to refer to the built-in signature helpers available in the Hack LSP instead for complete and up-to-date information.

Set callback for when the scheduler exits I/O wait

final public static function setOnIOWaitExitCallback(
  mixed $callback,
): void;

Parameters​

  • mixed $callback - A Closure to be called when I/O wait is exited

Returns​

  • void