Apart from just really cleaning things up and moving
everything into one class regarding thread IDs (ie,
is_main_thread(), comparing ID's etc), this also
fixes an obscure bug where LL was casting thread ID's
to U32 and then compared those to find out if it
the same thread. It's theoretically possible that
such fails on a 64bit OS.
By generalizing the interface, I adopted the use
of a thread-local cache for the current thread ID
as used by LLMutex et al, so now all code benefits
from that. The idea was even extended to now also
be used for is_main_thread() tests and even resetting
a thread ID to the ID of the current thread.
Updated/added documentation.
Removed AIThreadSafeWindowsHack that annoyed me (fix your compiler).
Don't use 'static' in anonymous namespace.
Use the AIThreadSafe*DC variants for default constructed objects,
as opposed to the AITHREADSAFE* macro's.
Added a new statemachine AIFetchInventoryFolder, which can be used
to fetch the contents of a folder by name or UUID.
Also added AIEvent (and one event,
AIEvent::LLInventoryModel_mIsAgentInvUsable_true, which is needed
for AIFetchInventoryFolder).
Fixed LLInventoryModel::sBackgroundFetchActive to correctly reflect
whether or not LLInventoryModel::backgroundFetch is added to
gIdleCallbacks.
Avoid duplicated entries in sFetchQueue.
Reset sFullFetchStarted in LLInventoryModel::stopBackgroundFetch to
allow for a renewed full fetch when some single-folder fetch stops it.
Added AIStateMachine::mQueued to make calling 'cont()' more robust:
calling cont() / idle() / cont() on a row would otherwise add a
statemachine twice to the active list, which would cause a crash
when it's killed.
The previous hack wasn't thread-safe: read-only access would
access the reference counter multiple times at the same time,
which therefore would have to be thread-local to ever work.
The current solution just disables the calls to lock/unlock
for copyconstructed objects, which works if the copyconstructed
object isn't used anymore after the original is destructed.
This is the case then the copy construction only happens
upon passing a temporary to a function, which is the case.
Resolved Conflicts:
indra/newview/llviewermedia.cpp
indra/plugins/base_media/CMakeLists.txt
Trivial fix for indra/newview/llviewermedia.cpp.
Moved 'prepare' dependency from base_media to
base_basic because media already depends on basic.
g++ 4.2 (and possibly earlier) apparently call a copy
constructor when passing a temporary to a function
that takes a const reference. Added code to allow
copy-constructing the AI*Access classes for this
compiler.
g++-4.2.x also bails out when it encounters files that
do not end on a newline. So, also added those where
they were missing.
