(PECL event >= 1.2.6-beta)
EventBuffer::expand — Reserves space in buffer
$len
): bool
Alters the last chunk of memory in the buffer, or adds a new chunk, such
that the buffer is now large enough to contain
len
bytes without any further allocations.
len
The number of bytes to reserve for the buffer
成功した場合に true を、失敗した場合に false を返します。