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following promotion of secondlife/viewer #705: Maintenance X
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LLAvatarListUpdater is an LLEventTimer subclass meant to be a base class of
still other subclasses. One would presume that every one of them should
override tick(), since LLAvatarListUpdater::tick() is a no-op that simply asks
to be called again. But making it abstract (=0) produces errors since at least
one subclass does not define its own tick() method. This seems less than
useful, since the specific tick() method is the whole point of deriving from
LLEventTimer, but oh well.
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Instead of maintaining a whole separate unordered_map to look up target times,
make room in the HandleMap entry for the target time. There's still
circularity, but the split into doAtTime1() and doAtTime2() resolves it: since
doAtTime2() accepts the mHandles iterator created by doAtTime1(), doAtTime2()
can simply store the new mQueue handle_type into the appropriate slot.
Also sprinkle in a few more override keywords for consistency.
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Some timer use cases need to know not only whether the timer is active, but
how much time remains before it (next) fires.
Introduce LLLater::mDoneTimes to track, for each handle, the timestamp at
which it's expected to fire. We can't just look up the target timestamp in
mQueue's func_at entry because there's no documented way to navigate from a
handle_type to a node iterator or pointer. Nor can we store it in mHandles
because of order dependency: we need the mDoneTimes iterator so we can bind it
into the Periodic functor for doPeriodically(), but we need the mQueue handle
to store in mHandles. If we could find the mQueue node from the new handle, we
could update the func_at entry after emplace() -- but if we could find the
mQueue node from a handle, we wouldn't need to store the target timestamp
separately anyway.
Split LLLater::doAtTime() into internal doAtTime1() and doAtTime2(): the first
creates an mDoneTimes entry and returns an iterator, the second finishes
creating new mQueue and mHandles entries based on that mDoneTimes entry.
This lets doPeriodically()'s Periodic bind the mDoneTimes iterator. Then
instead of continually incrementing an internal data member, it increments the
mDoneTimes entry to set the next upcoming timestamp. That lets getRemaining()
report the next upcoming timestamp rather than only the original one.
Add LLEventTimer::isRunning() and getRemaining(), forwarding to its LLLater
handle.
Fix various LLEventTimer subclass references to mEventTimer.stop(), etc.
Fix non-inline LLEventTimer subclass tick() overrides for bool, not BOOL.
Remove LLAppViewer::idle() call to LLEventTimer::updateClass(). Since
LLApp::stepFrame() already calls LLCallbackList::callFunctions(), assume we've
already handled that every tick.
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The big idea is to reduce the number of per-tick callbacks asking, "Is it time
yet? Is it time yet?" We do that for LLEventTimer and LLEventTimeout.
LLLater presents doAtTime(LLDate), with doAfterInterval() and doPeriodically()
methods implemented using doAtTime(). All return handles. The free functions
doAfterInterval() and doPeriodically() now forward to the corresponding
LLLater methods.
LLLater also presents isRunning(handle) and cancel(handle).
LLLater borrows the tactic of LLEventTimer: while there's at least one running
timer, it registers an LLCallbackList tick() callback to service ready timers.
But instead of looping over all of them asking, "Are you ready?" it keeps them
in a priority queue ordered by desired timestamp, and only touches those whose
timestamp has been reached. Also, it honors a maximum time slice: once the
ready timers have run for longer than the limit, it defers processing other
ready timers to the next tick() call. The intent is to consume fewer cycles
per tick() call, both by the management machinery and the timers themselves.
Revamp LLCallbackList to accept C++ callables in addition to (classic C
function pointer, void*) pairs. Make addFunction() return a handle (different
than LLLater handles) that can be passed to a new deleteFunction() overload,
since std::function instances can't be compared for equality.
In fact, implement LLCallbackList using boost::signals2::signal, which provides
almost exactly what we want.
LLCallbackList continues to accept (function pointer, void*) pairs, but now
we store a lambda that calls the function pointer with that void*. It takes
less horsing around to create a C++ callable from a (function pointer, void*)
pair than the other way around. For containsFunction() and deleteFunction(),
such pairs are the keys for a lookup table whose values are handles.
Instead of having a static global LLCallbackList gIdleCallbacks, make
LLCallbackList an LLSingleton to guarantee initialization. For backwards
compatibility, gIdleCallbacks is now a macro for LLCallbackList::instance().
Move doOnIdleOneTime() and doOnIdleRepeating() functions to LLCallbackList
methods, but for backwards compatibility continue providing free functions.
Reimplement LLEventTimer using LLLater::doPeriodically(). One implication is
that LLEventTimer need no longer be derived from LLInstanceTracker, which we
used to iterate over all instances every tick. Give it start() and stop()
methods, since some subclasses (e.g. LLFlashTimer) used to call its member
LLTimer's start() and stop(). Remove updateClass():
LLCallbackList::callFunctions() now takes care of that.
Remove LLToastLifeTimer::start() and stop(), since LLEventTimer now provides
those. Remove getRemainingTimeF32(), since LLLater does not (yet) provide that
feature.
While at it, make LLEventTimer::tick() return bool instead of BOOL, and change
existing overrides.
Make LLApp::stepFrame() call LLCallbackList::callFunctions() instead of
LLEventTimer::updateClass().
We could have refactored LLEventTimer to use the mechanism now built into
LLLater, but frankly the LLEventTimer API is rather clumsy. You MUST derive a
subclass and override tick(), and you must instantiate your subclass on the
heap because, when your tick() override returns false, LLEventTimer deletes
its subclass instance. The LLLater API is simpler to use, and LLEventTimer is
much simplified by using it.
Merge lleventfilter.h's LLEventTimeoutBase into LLEventTimeout, and likewise
merge LLEventThrottleBase into LLEventThrottle. The separation was for
testability, but now that they're no longer based on LLTimer, it becomes
harder to use dummy time for testing. Temporarily skip tests based on
LLEventTimeoutBase and LLEventThrottleBase.
Instead of listening for LLEventPump("mainloop") ticks and using LLTimer,
LLEventTimeout now uses LLLater::doAfterInterval(). Instead of LLTimer and
LLEventTimeout, LLEventThrottle likewise now uses LLLater::doAfterInterval().
Recast a couple local LLEventTimeout pre-lambda callable classes with lambdas.
Dignify F64 with a new typedef LLDate::timestamp. LLDate heavily depends on
that as its base time representation, but there are those who question use of
floating-point for time. This is a step towards insulating us from any future
change.
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LF, and trim trailing whitespaces as needed
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newview/llcallbacklist.cpp has no corresponding .h file, it isn't referenced
by newview/CMakeLists.txt, and its removal doesn't affect the build. See
llcommon/llcallbacklist.{h,cpp} for the real functionality.
(cherry picked from commit 8e53d6ff4c6594f014f456b0ba9ebf86ac91f6bc)
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since server still sends those in some cases
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following promotion of secondlife/viewer #736
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This reverts commit 810a3d24c2e3671f926091c062b101bdec6a1517. (secondlife/jira-archive-internal#70482)
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Also tweak existing Lua interleaved-responses test to accommodate new Lua
periodic suspend behavior.
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Use in LuaState::expr() so we can catch a runaway in-memory Lua chunk as well
as a script read from a file.
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Make LLCoros constructor echo "LLApp" status-change events on new "LLCoros"
event pump.
Rename LLCoros::kill() to killreq() because this operation only registers a
request for the named coroutine to terminate next time it calls checkStop().
Add a new CoroData member to record the name of the coroutine requesting
termination. killreq() sets that and also posts "killreq" to "LLCoros".
Add an optional final-cleanup callback to LLCoros::checkStop(). Make
checkStop() check for a pending killreq() request as well as viewer
termination. Introduce new LLCoros::Killed exception for that case.
Introduce LLCoros::getStopListener(), with two overloads, to encapsulate some
of the messy logic to listen (perhaps temporarily) for viewer shutdown. Both
overloads are for use by code at the source end of a queue or promise or other
resource for which coroutines might still be waiting at viewer shutdown time.
One overload is specifically for when the caller knows the name of the one and
only coroutine that will wait on the resource (e.g. because the caller IS that
coroutine). That overload honors killreq().
Use getStopListener() to simplify the four existing places where we set up
such a listener. Add a fifth: also make WorkQueue listen for viewer shutdown
(resolving a TODO comment).
Remove LLLUAmanager::terminateScript(), getTerminationList() and the static
sTerminationList. In the Lua interrupt callback, instead of checking
sTerminationList, call LLCoros::checkStop().
Change LLFloaterLUAScripts terminate-script logic to call LLCoros::killreq()
instead of posting on "LLLua" and calling LLLUAmanager::terminateScript().
Drop LLApp::setStatus() posting to "LLLua" LLEventPump: the above makes that
moot.
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Move towards packaging artifacts with xz, which offers higher compression ratios and faster decode time.
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