(PECL event >= 1.2.6-beta)
Adjusts read and/or write watermarks
public void EventBufferEvent::setWatermark ( int $events , int $lowmark , int $highmark )
Adjusts the read watermarks, the write watermarks , or both, of a single buffer event.
A buffer event watermark is an edge, a value specifying number of bytes to be read or written before callback is invoked. By default every read/write event triggers a callback invokation. See ยป Fast portable non-blocking network programming with Libevent: Callbacks and watermarks
Parameters:
events
Bitmask of Event::READ , Event::WRITE , or both.
lowmark
Minimum watermark value.
highmark
Maximum watermark value. 0 means "unlimited".
Returns:
No value is returned.
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