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Privileged
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For unknown reason allocations of these coroutines often crash on client machines.
1. Limit quantity of coros running in parallel by reducing retries and wait time
2. Print out more diagnostic info
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that unconditionally return. This eliminates the problem of pacifying a
compiler that expects a return statement vs. a compiler that detects that
callFail() unconditionally throws.
Thanks, Ansariel.
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LLSDParam<LLSD> is the generic case, when we need to pass LLSDParam adapters
to some set of function parameters whose types we don't specifically know. Its
templated conversion operator notices the actual parameter type T and
delegates conversion to the specific LLSDParam<T> specialization.
But when T has picked up references, e.g. somewhere along the way in the
LL::apply() machinery, the compiler might not choose the desired conversion
because we don't have a sufficiently specific LLSDParam specialization.
LLSDParam<LLSD> can address that by using std::decay_t<T> when delegating to
the specific LLSDParam specialization. This removes references, const and
volatile.
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There's a limit to how much time it's worth trying to work around a compiler
bug that's already been fixed in newer Xcode.
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That wasn't the issue. This is a compiler bug:
https://github.com/llvm/llvm-project/issues/41999
https://stackoverflow.com/q/57080425
https://bugs.llvm.org/show_bug.cgi?id=42654
This reverts commit c406fa7ae97441d1d6e0ea6727c42c8f978fabed.
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Both the previous version and this compile and run successfully with Xcode
14.3.1, but our older TeamCity compiler chokes -- so we must iterate remotely,
sigh.
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VC doesn't recognize that a constexpr name doesn't need to be bound into a
lambda. However, since it's knowable at compile time, it can be deduced within
the innermost lambda.
(cherry picked from commit 37c3daff1a565eaafee691dfb57702b6b8f024d6)
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Replace deprecated event mask call (macOS)
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replacement NSEventMaskAny. Functionality unaltered.
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Major improvements to LLLeap functionality
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following promotion of DRTVWR-580
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SL-20009 - race condition - calling cards could be created without name
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This happens when a calling card is created before the name is in the
name cache.
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Once std::apply() becomes available, 'using std::apply;' isn't correct because
the more general template tries to handle the apply(function, vector) case
that we explicitly implement below. Have to provide apply(function, tuple) and
apply(function, array) signatures that can forward to std::apply().
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(cherry picked from commit 2c1253c8ed2a1648317e6edd768b3fda00c56ce2)
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addMethod() was using dynamic_cast<target class*>(this) and testing for
nullptr to decide whether the class owning the passed method is, or is not, a
subclass of LLEventDispatcher. The trouble is that it doesn't work for the
deferred add() calls queued by LazyEventAPI: the dynamic_cast was always
returning nullptr. static_cast works better, but that leaves us with the
problem we were trying to solve with dynamic_cast: what if the target class
really isn't a subclass? Use std::is_base_of to pick which of two addMethod()
overloads to invoke, one of which calls addFail().
(cherry picked from commit a4d520aa5d023d80cfeec4f40c3464b54cbcfc5b)
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std::get<I>(const tuple) injects const into the type of each returned tuple
element. Need to get a non-const ref to the tuple param to get the true type.
(cherry picked from commit 6dda39065d3ee231998cb8a2896f94e8a45c9a82)
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(cherry picked from commit 3be250da90dd3d361df713056b881e017684e2b3)
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for exceptions other than those thrown by base-class LLEventDispatcher.
Explain in LLDispatchListener Doxygen comments that for a request lacking a
"reply" key, any exception is allowed to propagate because it's likely to
reach the post() call that triggered the exception in the first place.
For batch LLDispatchListener operations, catch not only LLEventDispatcher::
DispatchError exceptions but any std::exception, so we can collect them to
report to the invoker. "Gotta catch 'em all!"
Make LLLeap catch any std::exception thrown by processing a request from the
plugin child process, log it and send a reply to the plugin. No plugin should
be allowed to crash the viewer.
(cherry picked from commit 94e10fd039b79f71ed8d7e10807b6e4eebd1928c)
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Now an LLEventAPI subclass method can call callFail(...) to report an error,
and the error will be annotated with the leaf class name, the instance name
and the way the method was reached. The enriched error message will be logged
and either sent back to the invoker or propagated as an exception, depending
on the invocation tactic. In other words, a business method can use callFail()
to Do The Right Thing according to the LLEventDispatcher contract.
Introduce a nested SetState RAII class to set and clear transient state.
SetState's constructor accepts variadic stringize() arguments. The resulting
message is passed to LLEventDispatcher::setState(), which requires a SetState
reference because ONLY SetState should call setState(): state data really is
intended to be transient. SetState guarantees it will be cleared every time
it's set.
setState() respects previously-set transient state. If a call from an inner
function finds that transient state was already set by some ancestor, it
ignores the call and informs the caller by returning false. This lets a given
SetState instance recognize whether it is responsible for clearing the current
transient state.
operator<<(std::ostream&, const LLEventDispatcher&) now appends getState() to
the data reported by streaming *this. Non-static LLEventDispatcher::callFail()
already prepends *this to the reported error message.
Transient state is managed by a fiber_specific_ptr, since different threads
and even different fibers within a thread might be concurrently performing
different operations on the same LLEventDispatcher.
Introduce a back pointer to the parent LLEventDispatcher in DispatchEntry.
Populate it with a new constructor parameter, propagated through every
subclass constructor. Hoist ParamsDispatchEntry::callFail() up into its
DispatchEntry base class. Make it call non-static LLEventDispatcher::
callFail(), which prepends the reported error with instance and transient
state info. Use DispatchEntry::callFail() in LLSDDispatchEntry::call(),
instead of redundantly calling LLEventDispatcher::callFail().
Similarly, introduce an LLEventDispatcher back pointer into LLSDArgsMapper for
use by its own callFail() method.
The above should (!) eliminate the need to replicate LLEventDispatcher
instance info into every helper object's descriptive strings. In particular,
since the previous info was stored in each object by its constructor, it
couldn't report associated transient information about how the subject
callable was actually reached. Traversing a back pointer to the live
LLEventDispatcher instance gets us the most current state.
Make the internal three-argument LLEventDispatcher::try_call() method, which
implements each of the operator()() and public try_call() methods, use
SetState to append "[name]" (for explicit operator()(name, event) calls) or
"[key=name]" (for implicit operator()(event) calls) to streamed *this.
In the new LLDispatchListener request array and request map operations, use
SetState to indicate the current entry in the array or map, overriding the
lower-level state set by three-argument LLEventDispatcher::try_call().
(cherry picked from commit 2f8d7d20f43ab411ea0fe8b756cb696954acfb3e)
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Add LL::always_return<T>(), which takes a callable and variadic arguments. It
calls the callable with those arguments and, if the returned type is
convertible to T, converts it and returns it. Otherwise it returns T().
always_return() is generalized from, and supersedes,
LLEventDispatcher::ReturnLLSD.
Add LL::function_arity<CALLABLE>, which extends
boost::function_types::function_arity by reporting results for both
std::function<CALLABLE> and boost::function<CALLABLE>. Use for
LL::apply(function, LLSD array) as well as for LLEventDispatcher.
Make LLEventDispatcher::add() overloads uniformly distinguish between a
callable (whether non-static member function or otherwise) that accepts a
single LLSD parameter, versus any other signature. Accepting exactly one LLSD
parameter signals that the callable will accept the composite arguments LLSD
blob, instead of asking LLEventDispatcher to unpack the arguments blob into
individual arguments.
Support add(subclass method) overloads for arbitrary-parameters methods as
well as for (const LLSD&) methods. Update tests accordingly: we need no longer
pass the boilerplate lambda instance getter that binds and returns 'this'.
Extract to the two LLEventDispatcher::make_invoker() overloads the LL::apply()
logic formerly found in ReturnLLSD.
Change lleventdispatcher_test.cpp tests from boost::bind(), which accepts
variadic arguments (even though it only passes a fixed set to the target
callable), to fixed-signature lambdas. This is because the revamped add()
overloads care about signature.
Add a test for a non-static method that accepts (const LLSD&), in other words
the composite arguments LLSD blob, and likewise returns LLSD.
(cherry picked from commit 95b787f7d7226ee9de79dfc9816f33c8bf199aad)
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Specifically, add tests for:
- successful map batch
- map batch with some errors and a reply pump
- map batch with some errors and no reply
- successful array batch
- array batch with some errors and a reply pump
- array batch with some errors and no reply
(cherry picked from commit 078f0f5c9fb5075a8ad01cac417e1d7ee2b6a919)
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Fix lleventdispatcher_test.cpp's test class DispatchResult::strfunc(),
intfunc(), mapfunc() and arrayfunc() to return values derived from (not
identical to) their arguments, so we can reuse these functions for further
testing of passing arguments to a named callable. Adjust existing tests
accordingly.
(cherry picked from commit 07e09a8daea008d28b97399920db60a147cf75c0)
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Now the value of the incoming event's dispatch key may be an LLSD::String (as
before), a map or an array, as documented in the augmented Doxygen class
comments. LLDispatchListener will attempt multiple calls before sending a
reply.
(cherry picked from commit 7671b37285c6cdf1afcddb0019311a822c8a4dc5)
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This captures logic we intend to reuse for forthcoming LLDispatchListener
batched request support.
(cherry picked from commit 3cb6d374cb76e4b00dc121255e8f5aa4e777fa27)
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Refine the special case of calling a nullary target function from an (event)
method, notably via LLDispatchListener.
(cherry picked from commit edcc52a9f60b1ec9b8f53603d6e2676558d41294)
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Add a new LLEventDispatcher constructor accepting not only the map key to
extract a requested function name, but a second map key to extract the
arguments -- when required.
In Doxygen comments, clarify the difference between the two constructors.
Move interaction with the LLEventPump subsystem to LLDispatchListener.
LLEventDispatcher is intended to be directly called. On error, instead of
looking for a "reply" key in the invocation LLSD, throw DispatchError.
Publish DispatchError, formerly an implementation detail, and its new subclass
DispatchMissing.
Make both LLEventDispatcher::operator()() overloads return LLSD, leveraging
the new internal ReturnLLSD logic that returns a degenerate LLSD blob for a
void target callable and, for compatible types, converts the returned value to
LLSD. Notably, the public try_call() overloads still return bool; any value
returned by the target callable is discarded.
Clarify the operator() and try_call() argument requirements for target
callables registered to accept an LLSD array, in Doxygen comments and in code.
In particular, the 'event' passed to (event) overloads (vs. the (name, event)
overloads) must be an LLSD map, so it must contain an "args" key (or the new
arguments map key specified to the constructor) containing the LLSD args
array.
Since the use of the new args key depends on whether the target callable is
registered to accept an array or a map, pass it into DispatchEntry::call()
(and all subclass overrides), along with a bool to disambiguate whether we
reached that method from an LLEventDispatcher (event) invocation method or a
(name, event) invocation method.
Allow streaming an LLEventDispatcher instance to std::ostream, primarily to
facilitate construction of proper error messages.
Revert the 'name' argument of internal try_call(key, name, event) to
std::string. Ditch try_call_log(), try_call_one() and reply(). Fold
try_call_one() logic into three-argument try_call().
Refactor callFail() as a template method accepting both the exception to throw
and arbitrary stringize() arguments from which to construct the exception
message. Non-static callFail() implicitly prepends the instance and a colon to
the rest of the arguments, and calls static sCallFail(). The latter constructs
the exception message, logs it and throws the specified exception. This
obviates try_call_log().
Make implementation detail helper class LLSDArgsMapper a private member of
LLEventDispatcher so it can access sCallFail(): we now want all error handling
to go through that method. Add LLSDArgsMapper::callFail() resembling
LLSDEventDispatcher::callFail(), but without having to specify the exception:
only LLEventDispatcher will throw anything but generic DispatchError.
Give LLEventDispatcher::ParamsDispatchEntry and its subclasses
ArrayParamsDispatchEntry and MapParamsDispatchEntry a new 'name' argument to
identify error messages. Store it and use it implicitly in new callFail()
method, very like LLSDArgsMapper::callFail(). Make LLEventDispatcher::
addArrayParamsDispatchEntry() and addMapParamsDispatchEntry() pass a 'name'
that includes the LLEventDispatcher instance name as well as the name of the
specific registered callable. This way we need not intercept a low-level error
and annotate it with contextual data: we can just let the exception propagate.
Make ParamsDispatchEntry::call() override catch LL::apply_error thrown by an
invoker_function, and pass its message to callFail(), i.e. rethrow as
LLEventDispatcher::DispatchError.
Introduce ArrayParamsDispatchEntry::call() override for the special logic to
extract an arguments array from a passed LLSD map -- but only under the
circumstances described in the Doxygen comment.
Add similar logic to MapParamsDispatchEntry::call(), but with both argskey
itself and a value for argskey optional in the passed LLSD map.
Because LLEventDispatcher now has two constructor overloads, allow subclass
constructor LLDispatchListener() to accept zero or more trailing arguments.
This is different than giving LLDispatchListener's constructor a default final
argument, in that the subclass doesn't need to specify its default value:
that's up to the base-class constructor. But it does require that the subclass
constructor move to the header file.
Move private LLEventDispatcher::reply() method to LLDispatchListener. Extend
LLDispatchListener::process() to handle DispatchError by attempting to reply
with a map containing an "error" key, per convention. (In other words, move
that logic from LLEventDispatcher to LLDispatchListener.) Also, for a map LLSD
result, attempt to reply with that result; for other defined LLSD types,
attempt to reply with a map containing a "data" key. This is backwards
compatible with previous behavior because all previous LLDispatchListener
subclass methods returned void, which now produces an undefined LLSD blob,
which we don't bother trying to send in reply.
In lleventdispatcher_test.cpp, rework tut::lleventdispatcher_data::call_exc()
yet again to catch DispatchError instead of listening for an LLEventPump reply
event. Similarly, make call_logerr() catch DispatchError. Since the exception
should also be logged, we ignore it and focus on the log, as before.
Add tests <23> to <27>, exercising calls to new class DispatchResult methods
returning string, int, LLSD map, LLSD array and void.
(cherry picked from commit 2f9c915dd3d5137b5b2b1a57f0179e1f7a090f8c)
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(cherry picked from commit 374eb409b98795158b36e232f670d1302f31b9ff)
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(cherry picked from commit 2ffbadc7a1275f662eb97ff9ce163a18cdb62c7c)
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