Remove WindowManager wrappers.
It's not safe to use WindowManager in all places and it's not required.
Environment stores resource system providing VFS required to call these
functions. In the case of ObjectPaging it's available from the member variable.
Also ObjectPaging::createChunk may access WindowManager when it's already
destructed when exiting the game because it's destructed before CellPreloader
finishes all background jobs. Engine::mResourceSystem is destructed after all
other systems so it's safe to use it.
Use LRU cache for ESMReaders. When cache capacity is reached close least
recently used ESMReader. Remember the file name if a reader was open. Once the
reader requested again open the file if there is stored name for it. Put
released ESMReader to the back of the free items list. Close ESMReader's from
the front of the free items list.
Cached item can be used only by one client at the same time. If the same item is
requested twice exception is thrown. This should never happen in practice. If
this happens need to fix the client logic.
It's allowed to go over the capacity limit when requesting different readers.
Ideally this should never happen but there will be system error anyway
signalizing about too many open files. Need to fix client logic in this case.
All places that were using a vector of ESMReaders now using the cache. Cache is
local for each use case and there is no need for a thread safety.
In file included from /home/elsid/dev/openmw/build/clang/unity/apps/openmw/ub_mwworld.cpp:41:
/home/elsid/dev/openmw/apps/openmw/mwworld/groundcoverstore.cpp:10:9: error: no type named 'Query' in 'MWWorld::EsmLoader'; did you mean '::EsmLoader::Query'?
EsmLoader::Query query;
^~~~~~~~~~~~~~~~
::EsmLoader::Query
/home/elsid/dev/openmw/./components/esmloader/load.hpp:23:12: note: '::EsmLoader::Query' declared here
struct Query
^
