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An object of EventBufferEvent class represents a buffer event . The asynchronous nature of I/O performed by Libevent implies that a socket(or other kind of file descriptor) is not always available. Event invokes corresponding callbacks when the resource becomes available for reading or writing, or when some event occurs(e.g. error, "end of line" etc.).
Read and write callbacks should match the following prototype:
$bev
= NULL
[, mixed $arg
= NULL
]] )
bev
Associated EventBufferEvent object.
arg
Custom variable attached to all callbacks via EventBufferEvent::__construct() , or EventBufferEvent::setCallbacks() .
Event callback should match the following prototype:
$bev
= NULL
[, int $events
= 0
[, mixed $arg
= NULL
]]] )
bev
Associated EventBufferEvent object.
events
Bit mask of events:
EventBufferEvent::READING
,
EventBufferEvent::WRITING
,
EventBufferEvent::EOL
,
EventBufferEvent::ERROR
and
EventBufferEvent::TIMEOUT
. See
EventBufferEvent constants
arg
Custom variable attached to all callbacks via EventBufferEvent::__construct() , or EventBufferEvent::setCallbacks() .