|new||Creates new event loop, returns created object|
addFD ( HANDLE, CALLBACK, ?NAME ) Adds file handle HANDLE to the event loop, so that CALLBACK gets triggered if HANDLE is readable. CALLBACK is a callback accepted by <B>invoke_callbackB> in Net::SIP::Util. The callback will be invoked with HANDLE as an additional argument.
NAME can be used to aid debugging, it will be shown in the debug messages once the FD gets ready.
If there was already a callback for HANDLE it gets replaced by the new one.
IMPORTANT NOTE: CALLBACK gets triggered if HANDLE *is* readable inside the loop, not if HANDLE *gets* readable. Unlike with Event::Lib or similar the CALLBACK is not triggered by the edge, but by the level (like poll(2) or select(2)). So if 2 bytes come in at the handle and one reads only 1 byte in the callback the callback gets triggered again for more data. You have to watch this, if you want to integrate Net::SIP with your existing event loop.
delFD ( HANDLE ) Removes HANDLE from loop, e.g. no more checking for readability will be done. add_timer( WHEN, CALLBACK, [ REPEAT ] ) Adds timer which gets triggered at WHEN or now + WHEN. Depending on the value of WHEN it gets interpreted as the number of seconds since 1970-01-01 (when its really big) or as a relative time (when its not that big). WHEN can be floating point for subseconds resolution.
CALLBACK is a callback accepted by <B>invoke_callbackB> in Net::SIP::Util. It gets invoked with the timer object (see later) as an additional argument, which has a method <B>cancelB> for canceling the (repeating) timer.
REPEAT is the number of seconds between each invocation of the timer. If greater then 0 (subsection resulution possible) the callback will be called each REPEAT seconds, after it was called the first time at WHEN.
looptime Returns the current loop time in subseconds resolution (using <B>gettimeofdayB> from Time::HiRes). This is not the current time, but the time, when the last event in the loop occured (e.g. when the select(2) call returned) loop ( [ TIMEOUT, \@STOPVAR ] ) The main loop, e.g. continuiosly checks timers and file handles for the events and calls callbacks.
If TIMEOUT is given it will run the loop for at most TIMEOUT seconds, then the method will return. Undefined TIMEOUT means that it will never return because of timeout and TIMEOUT of 0 means that it will check all timers and handles only once and then return.
@STOPVAR is a list of scalar references. These scalars are expected to be changed from the callbacks, so it will check after each loop cycle, e.g. after all callbacks are called (timers and handles) if any of these scalars is TRUE, in which case it will end the loop.
The behavior with STOPVAR cannot be found in most existing event loops. If you want to integrate Net::SIP with your own event loop you migth simply wrap all callbacks given in <B>addFDB> and <B>add_timerB> in another callback which at the end checks the stopvars and terminates the 3rd-party loop in a loop-specific way.
|perl v5.20.3||NET::SIP::DISPATCHER::EVENTLOOP (3)||2009-01-23|