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    Worker::collect

    (PECL pthreads >= 3.0.0)

    Worker::collect — Collect references to completed tasks

    説明

    public Worker::collect(Callable $collector = ?): int

    Allows the worker to collect references determined to be garbage by the optionally given collector.

    パラメータ

    collector

    A Callable collector that returns a boolean on whether the task can be collected or not. Only in rare cases should a custom collector need to be used.

    戻り値

    The number of remaining tasks on the worker's stack to be collected.

    例

    例1 A basic example of Worker::collect()

    <?php
    $worker     = new Worker();

    echo     "There are currently {$worker->collect()} tasks on the stack to be collected\n";

    for (    $i = 0; $i < 15; ++$i) {
    $worker->stack(new class extends Threaded {});
    }

    echo     "There are {$worker->collect()} tasks remaining on the stack to be collected\n";

    $worker->start();

    while (    $worker->collect()); // blocks until all tasks have finished executing

    echo "There are now {$worker->collect()} tasks on the stack to be collected\n";

    $worker->shutdown();

    上の例の出力は以下となります。

    There are currently 0 tasks on the stack to be collected
There are 15 tasks remaining on the stack to be collected
There are now 0 tasks on the stack to be collected

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