(PECL event >= 1.2.6-beta)
EventBuffer::drain — Removes specified number of bytes from the front of the buffer without copying it anywhere
Behaves as EventBuffer::read() , except that it does not copy the data: it just removes it from the front of the buffer.
len
The number of bytes to remove from the buffer.
成功した場合に true
を、失敗した場合に false
を返します。