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Get rid of that ugly '#pragma clang diagnostic ignored "-Wdelete-incomplete"' by making sure the delete always happens inside llview.cpp, where the type of LLView is known.
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This is not correct, as clang is available on all 3 platforms. The correct way to check for this is via __clang__ (https://clang.llvm.org/docs/LanguageExtensions.html#builtin-macros)
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# Conflicts:
# indra/llcommon/llerror.cpp
# indra/newview/llappviewerwin32.cpp
# indra/newview/llimprocessing.cpp
# indra/newview/llviewerjoystick.cpp
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# Conflicts:
# autobuild.xml
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# Conflicts:
# autobuild.xml
# indra/newview/llimprocessing.cpp
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temp
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# Conflicts:
# indra/llcommon/llkeybind.cpp
# indra/llcommon/llkeybind.h
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Changes were moved to DRTVWR-514
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"SpellCheck" is FALSE
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# Conflicts:
# indra/llxml/llcontrolgroupreader.h
# indra/newview/llviewerkeyboard.cpp
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# Conflicts:
# indra/newview/llinventorybridge.cpp
# indra/newview/llinventorypanel.cpp
# indra/newview/lltexturectrl.cpp
# indra/newview/skins/default/xui/de/floater_texture_ctrl.xml
# indra/newview/skins/default/xui/es/floater_texture_ctrl.xml
# indra/newview/skins/default/xui/fr/floater_texture_ctrl.xml
# indra/newview/skins/default/xui/it/floater_texture_ctrl.xml
# indra/newview/skins/default/xui/ja/floater_texture_ctrl.xml
# indra/newview/skins/default/xui/pt/floater_texture_ctrl.xml
# indra/newview/skins/default/xui/ru/floater_texture_ctrl.xml
# indra/newview/skins/default/xui/tr/floater_texture_ctrl.xml
# indra/newview/skins/default/xui/zh/floater_texture_ctrl.xml
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# Conflicts:
# indra/llmath/llquaternion.h
# indra/newview/lldrawpoolwater.cpp
# indra/newview/lljoystickbutton.cpp
# indra/newview/llvosky.cpp
# indra/newview/skins/default/textures/textures.xml
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# Conflicts:
# indra/newview/app_settings/shaders/class1/objects/previewV.glsl
# indra/newview/lldynamictexture.cpp
# indra/newview/llfloatermodelpreview.cpp
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# Conflicts:
# indra/newview/pipeline.cpp
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LLEventDetail::visit_and_connect() promised special treatment for the
specific case when an LLEventPump::listen() listener was composed of (possibly
nested) boost::bind() objects storing boost::weak_ptr values -- specifically
boost::bind() rather than std::bind or lambdas, specifically boost::weak_ptr
rather than std::weak_ptr.
Outside of self-tests, it does not appear that anyone actually uses that
support.
There is good reason not to: it's a silent side effect of a complicated
compile-time inspection that could be silently derailed by use of std::bind()
or a lambda or a std::weak_ptr. Can you be sure you've engaged that promise?
How?
A more robust guarantee can be achieved by storing an LLTempBoundConnection in
the transient object itself. When the object is destroyed, the listener is
disconnected. Normal C++ rules around object destruction guarantee it. This
idiom is widely used.
There are a couple good reasons to remove the visit_and_connect() machinery:
* boost::bind() and boost::weak_ptr do not constitute the wave of the future.
Preferring those constructs to lambdas and std::weak_ptr penalizes new code,
whether by silently failing or by discouraging use of modern idioms.
* The visit_and_connect() machinery was always complicated, and apparently
never very robust. Most of its promised features have been commented out
over the years. Making the code base simpler, clearer and more maintainable
is always a useful effect.
LLEventDetail::visit_and_connect() was also used by the four
LLNotificationChannelBase::connectMumble() methods. Streamline those as well.
Of course, remove related test code.
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Longtime fans will remember that the "dcoroutine" library is a Google Summer
of Code project by Giovanni P. Deretta. He originally called it
"Boost.Coroutine," and we originally added it to our 3p-boost autobuild
package as such. But when the official Boost.Coroutine library came along
(with a very different API), and we still needed the API of the GSoC project,
we renamed the unofficial one "dcoroutine" to allow coexistence.
The "dcoroutine" library had an internal low-level API more or less analogous
to Boost.Context. We later introduced an implementation of that internal API
based on Boost.Context, a step towards eliminating the GSoC code in favor of
official, supported Boost code.
However, recent versions of Boost.Context no longer support the API on which
we built the shim for "dcoroutine." We started down the path of reimplementing
that shim using the current Boost.Context API -- then realized that it's time
to bite the bullet and replace the "dcoroutine" API with the Boost.Fiber API,
which we've been itching to do for literally years now.
Naturally, most of the heavy lifting is in llcoros.{h,cpp} and
lleventcoro.{h,cpp} -- which is good: the LLCoros layer abstracts away most of
the differences between "dcoroutine" and Boost.Fiber.
The one feature Boost.Fiber does not provide is the ability to forcibly
terminate some other fiber. Accordingly, disable LLCoros::kill() and
LLCoprocedureManager::shutdown(). The only known shutdown() call was in
LLCoprocedurePool's destructor.
We also took the opportunity to remove postAndSuspend2() and its associated
machinery: FutureListener2, LLErrorEvent, errorException(), errorLog(),
LLCoroEventPumps. All that dual-LLEventPump stuff was introduced at a time
when the Responder pattern was king, and we assumed we'd want to listen on one
LLEventPump with the success handler and on another with the error handler. We
have never actually used that in practice. Remove associated tests, of course.
There is one other semantic difference that necessitates patching a number of
tests: with "dcoroutine," fulfilling a future IMMEDIATELY resumes the waiting
coroutine. With Boost.Fiber, fulfilling a future merely marks the fiber as
ready to resume next time the scheduler gets around to it. To observe the test
side effects, we've inserted a number of llcoro::suspend() calls -- also in
the main loop.
For a long time we retained a single unit test exercising the raw "dcoroutine"
API. Remove that.
Eliminate llcoro_get_id.{h,cpp}, which provided llcoro::get_id(), which was a
hack to emulate fiber-local variables. Since Boost.Fiber has an actual API for
that, remove the hack.
In fact, use (new alias) LLCoros::local_ptr for LLSingleton's dependency
tracking in place of llcoro::get_id().
In CMake land, replace BOOST_COROUTINE_LIBRARY with BOOST_FIBER_LIBRARY. We
don't actually use the Boost.Coroutine for anything (though there exist
plausible use cases).
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The previous implementation went to some effort to crash if anyone attempted
to create or destroy an LLInstanceTracker subclass instance during traversal.
That restriction is manageable within a single thread, but becomes unworkable
if it's possible that a given subclass might be used on more than one thread.
Remove LLInstanceTracker::instance_iter, beginInstances(), endInstances(),
also key_iter, beginKeys() and endKeys(). Instead, introduce key_snapshot()
and instance_snapshot(), the only means of iterating over LLInstanceTracker
instances. (These are intended to resemble functions, but in fact the current
implementation simply presents the classes.) Iterating over a captured
snapshot defends against container modifications during traversal. The term
'snapshot' reminds the coder that a new instance created during traversal will
not be considered. To defend against instance deletion during traversal, a
snapshot stores std::weak_ptrs which it lazily dereferences, skipping on the
fly any that have expired.
Dereferencing instance_snapshot::iterator gets you a reference rather than a
pointer. Because some use cases want to delete all existing instances, add an
instance_snapshot::deleteAll() method that extracts the pointer. Those cases
used to require explicitly copying instance pointers into a separate
container; instance_snapshot() now takes care of that. It remains the caller's
responsibility to ensure that all instances of that LLInstanceTracker subclass
were allocated on the heap.
Replace unkeyed static LLInstanceTracker::getInstance(T*) -- which returned
nullptr if that instance had been destroyed -- with new getWeak() method
returning std::weak_ptr<T>. Caller must detect expiration of that weak_ptr.
Adjust tests accordingly.
Use of std::weak_ptr to detect expired instances requires engaging
std::shared_ptr in the constructor. We now store shared_ptrs in the static
containers (std::map for keyed, std::set for unkeyed).
Make LLInstanceTrackerBase a template parameterized on the type of the static
data it manages. For that reason, hoist static data class declarations out of
the class definitions to an LLInstanceTrackerStuff namespace.
Remove the static atomic sIterationNestDepth and its methods incrementDepth(),
decrementDepth() and getDepth(), since they were used only to forbid creation
and destruction during traversal.
Add a std::mutex to static data. Introduce an internal LockStatic class that
locks the mutex while providing a pointer to static data, making that the only
way to access the static data.
The LLINSTANCETRACKER_DTOR_NOEXCEPT macro goes away because we no longer
expect ~LLInstanceTracker() to throw an exception in test programs.
That affects LLTrace::StatBase as well as LLInstanceTracker itself.
Adapt consumers to the new LLInstanceTracker API.
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