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The previous LLSafeHandle<T> implementation declares a static data member of
the template class but provides no (generic) definition, relying on particular
specializations to provide the definition. The data member is a function
pointer, which is called in one of the methods to produce a pointer to a
"null" T instance: that is, a dummy instance to be dereferenced in case the
wrapped T* is null.
Xcode 8.3's version of clang is bothered by the call, in a generic method,
through this (usually) uninitialized pointer. It happens that the only
specializations of LLSafeHandle do both provide definitions. I don't know
whether that's formally valid C++03 or not; but I agree with the compiler: I
don't like it.
Instead of declaring a public static function pointer which each
specialization is required to define, add a protected static method to the
template class. This protected static method simply returns a pointer to a
function-static T instance. This is functionally similar to a static
LLPointer<T> set on demand (as in the two specializations), including lazy
instantiation.
Unlike the previous implementation, this approach prohibits a given
specialization from customizing the "null" instance function. Although there
exist reasonable ways to support that (e.g. a related traits template), I
decided not to complicate the LLSafeHandle implementation to make it more
generally useful. I don't really approve of LLSafeHandle, and don't want to
see it proliferate. It's not clear that unconditionally dereferencing
LLSafeHandle<T> is in any way better than conditionally dereferencing
LLPointer<T>. It doesn't even skip the runtime conditional test; it simply
obscures it. (There exist hints in the code that at one time it might have
immediately replaced any wrapped null pointer value with the pointer to the
"null" instance, obviating the test at dereference time, but this is not the
current functionality. Perhaps it was only ever wishful thinking.)
Remove the corresponding functions and static LLPointers from the two classes
that use LLSafeHandle.
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linked
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A shocking number of LLSingleton subclasses had public constructors -- and in
several instances, were being explicitly instantiated independently of the
LLSingleton machinery. This breaks the new LLSingleton dependency-tracking
machinery. It seems only fair that if you say you want an LLSingleton, there
should only be ONE INSTANCE!
Introduce LLSINGLETON() and LLSINGLETON_EMPTY_CTOR() macros. These handle the
friend class LLSingleton<whatevah>;
and explicitly declare a private nullary constructor.
To try to enforce the LLSINGLETON() convention, introduce a new pure virtual
LLSingleton method you_must_use_LLSINGLETON_macro() which is, as you might
suspect, defined by the macro. If you declare an LLSingleton subclass without
using LLSINGLETON() or LLSINGLETON_EMPTY_CTOR() in the class body, you can't
instantiate the subclass for lack of a you_must_use_LLSINGLETON_macro()
implementation -- which will hopefully remind the coder.
Trawl through ALL LLSingleton subclass definitions, sprinkling in
LLSINGLETON() or LLSINGLETON_EMPTY_CTOR() as appropriate. Remove all explicit
constructor declarations, public or private, along with relevant 'friend class
LLSingleton<myself>' declarations. Where destructors are declared, move them
into private section as well. Where the constructor was inline but nontrivial,
move out of class body.
Fix several LLSingleton abuses revealed by making ctors/dtors private:
LLGlobalEconomy was both an LLSingleton and the base class for
LLRegionEconomy, a non-LLSingleton. (Therefore every LLRegionEconomy instance
contained another instance of the LLGlobalEconomy "singleton.") Extract
LLBaseEconomy; LLGlobalEconomy is now a trivial subclass of that.
LLRegionEconomy, as you might suspect, now derives from LLBaseEconomy.
LLToolGrab, an LLSingleton, was also explicitly instantiated by
LLToolCompGun's constructor. Extract LLToolGrabBase, explicitly instantiated,
with trivial subclass LLToolGrab, the LLSingleton instance.
(WARNING: LLToolGrabBase methods have an unnerving tendency to go after
LLToolGrab::getInstance(). I DO NOT KNOW what should be the relationship
between the instance in LLToolCompGun and the LLToolGrab singleton instance.)
LLGridManager declared a variant constructor accepting (const std::string&),
with the comment:
// initialize with an explicity grid file for testing.
As there is no evidence of this being called from anywhere, delete it.
LLChicletBar's constructor accepted an optional (const LLSD&). As the LLSD
parameter wasn't used, and as there is no evidence of it being passed from
anywhere, delete the parameter.
LLViewerWindow::shutdownViews() was checking LLNavigationBar::
instanceExists(), then deleting its getInstance() pointer -- leaving a
dangling LLSingleton instance pointer, a land mine if any subsequent code
should attempt to reference it. Use deleteSingleton() instead.
~LLAppViewer() was calling LLViewerEventRecorder::instance() and then
explicitly calling ~LLViewerEventRecorder() on that instance -- leaving the
LLSingleton instance pointer pointing to an allocated-but-destroyed instance.
Use deleteSingleton() instead.
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ground. WIP on better tracking of attachment requests via various message in LLSelectMgr.
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if user uses Select Only My Objects option
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not return colour icon to previous condition
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consolidated most indra-specific constants in llcommon under indra_constants.h
fixed issues with operations on mixed unit types (implicit and explicit)
made LL_INFOS() style macros variadic in order to subsume other logging methods
such as ll_infos
added optional tag output to error recorders
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selections
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channels and make the materials CB use a UUID instead of this pointer for safety
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"Reference"
in the tools floater
Reviewed with Simon.
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* Show creator, owner and group information when only selecting a single prim
in a linkset.
reviewed with Simon
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characters..." right-click menu option does not show for objects outside the current region.
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context-sensitive menu option of "Show in linksets...".
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multiple objects selected.
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- Implemented Richard's and Leo's spec
- Also fixed an issue when applying no-transfer texture for an object using texture picker, creates redundant copies of the texture in the object's content
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mode. Displaying a modal notification if user attempts.
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the server to remove the message handling.
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the flags to managed pathfinding flags such as permanent and character.
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- Moved callbacks for Link/Unlink to the LLSelectMgr
- Binded Link/Unlink callbacks with buttons in Build Floater
- Replaced view_listener_t usage for Link, Unlink, EnableLink, EnableUnlink with boost::bind
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silhouette segments pointing at center of screen.
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Fixed the texture resolution calculation against the rounding errors
we had before.
Fixed the bug where linking prims changed the combined cost
Fixed the bug where twisting was not computed properly
Code reviewed by davep.
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