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    eio_nop

    (PECL eio >= 0.0.1dev)

    eio_nop — Does nothing, except go through the whole request cycle

    说明

    eio_nop(int $pri = EIO_PRI_DEFAULT, callable $callback = NULL, mixed $data = NULL): resource

    eio_nop() does nothing, except go through the whole request cycle. Could be useful in debugging.

    参数

    pri

    请求的优先级：EIO_PRI_DEFAULT，EIO_PRI_MIN，EIO_PRI_MAX 或 null。如果是 null，pri 将设为 EIO_PRI_DEFAULT。

    callback

    callback 函数在请求完成时被调用。其应匹配一下原型：

    void callback(mixed $data, int $result[, resource $req]);
    data

    传递给请求的用户数据。

    result

    针对请求的结果的值。通常是相应的系统调用返回的值。

    req

    可选的请求资源，可被 eio_get_last_error() 之类的函数使用。

    data

    Arbitrary variable passed to callback.

    返回值

    eio_nop() returns request resource on success, 或者在失败时返回 false.

    参见

    • eio_busy() - Artificially increase load. Could be useful in tests, benchmarking
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