eio_fdatasync

(PECL eio >= 0.0.1dev)

eio_fdatasyncSynchronize a file's in-core state with storage device

說明

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

eio_fdatasync() synchronizes a file's in-core state with storage device.

參數(shù)

fd

Stream, Socket resource, or numeric file descriptor, e.g. returned by eio_open().

pri

請(qǐng)求的優(yōu)先級(jí):EIO_PRI_DEFAULTEIO_PRI_MIN,EIO_PRI_MAXnull。如果是 null,pri 將設(shè)為 EIO_PRI_DEFAULT

callback

callback 函數(shù)在請(qǐng)求完成時(shí)被調(diào)用。其應(yīng)匹配一下原型:

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

傳遞給請(qǐng)求的用戶數(shù)據(jù)。

result

針對(duì)請(qǐng)求的結(jié)果的值。通常是相應(yīng)的系統(tǒng)調(diào)用返回的值。

req

可選的請(qǐng)求資源,可被 eio_get_last_error() 之類的函數(shù)使用。

data

Arbitrary variable passed to callback.

返回值

eio_fdatasync() returns request resource on success, 或者在失敗時(shí)返回 false.