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(PECL eio >= 0.0.1dev)
eio_busy — Artificially increase load. Could be useful in tests, benchmarking.
$delay
[, int $pri = EIO_PRI_DEFAULT
[, callable $callback = NULL
[, mixed $data = NULL
]]] ) eio_busy() artificially increases load taking
delay seconds to execute. May be used for debugging,
or benchmarking.
delay Delay in seconds
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 This callback is called when all the group requests are done.
data
Arbitrary variable passed to callback.
eio_busy() returns request resource on success or FALSE on error.