Establishes the current time by querying the kernel, updating the time returned by EvLoop::now in the progress

# EvLoop::nowUpdate

(PECL ev >= 0.2.0)

EvLoop::nowUpdate — Establishes the current time by querying the kernel, updating the time returned by EvLoop::now in the progress

### 説明

public function EvLoop::nowUpdate(): void

Establishes the current time by querying the kernel, updating the time returned by EvLoop::now() in the progress. This is a costly operation and is usually done automatically within EvLoop::run().

### パラメータ

この関数にはパラメータはありません。

### 戻り値

値を返しません。

### 参考

- EvLoop::now() - Returns the current "event loop time"
- Ev::nowUpdate() - カーネルに問い合わせて現在時刻を確認し、処理中の Ev::now が返す時刻を更新する

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