This PR fixes a crash caused by the improperly ensured lifetime of RigGeometry::mSourceGeometry. mSourceGeometry was not adequate to ensure mSourceGeometry would outlive mGeometry because we extend mGeometrys lifetime beyond this lifetime by passing mGeometry to the draw traversal instead of this.
In addition,
We add important comments.
We detect and prevent generally unsafe operations in high level code.
We add a sprinkling of const to help clarify intentions.
Currently, we use an `UnrefQueue` which supposedly aims to transfer destruction costs to another thread. The implications of this unusual pattern can not be well understood because some allocators might free resources more efficiently if they are freed by the same thread that allocated them. In addition, `UnrefQueue` complicates the validation of thread safety in our engine. Lastly, our current usage of `UnrefQueue` triggers `ref()`, `unref()` atomic operations as objects are passed into the queue. These operations could be more expensive than the actual destruction.
With this PR we thus remove `UnrefQueue`. We can expect these changes to have a minor impact at most because we free most resources elsewhere in `ResourceSystem::updateCache`.
==16218== Conditional jump or move depends on uninitialised value(s)
==16218== at 0xCDBC27: MWPhysics::Object::commitPositionChange() (object.cpp:68)
==16218== by 0xCE5B64: MWPhysics::PhysicsTaskScheduler::updatePtrAabb(std::shared_ptr<MWPhysics::PtrHolder> const&) (mtphysics.cpp:446)
==16218== by 0xCE5CC3: operator() (mtphysics.cpp:432)
==16218== by 0xCE5CC3: for_each<std::_Rb_tree_const_iterator<std::shared_ptr<MWPhysics::PtrHolder> >, MWPhysics::PhysicsTaskScheduler::updateAabbs()::<lambda(const std::shared_ptr<MWPhysics::PtrHolder>&)> > (stl_algo.h:3820)
==16218== by 0xCE5CC3: MWPhysics::PhysicsTaskScheduler::updateAabbs() (mtphysics.cpp:431)
==16218== by 0xCE5E35: MWPhysics::PhysicsTaskScheduler::afterPreStep() (mtphysics.cpp:586)
==16218== by 0xCE6238: operator() (mtphysics.cpp:533)
==16218== by 0xCE6238: wait<MWPhysics::PhysicsTaskScheduler::doSimulation()::<lambda()> > (barrier.hpp:33)
==16218== by 0xCE6238: MWPhysics::PhysicsTaskScheduler::doSimulation() (mtphysics.cpp:533)
==16218== by 0xCE6377: MWPhysics::PhysicsTaskScheduler::worker() (mtphysics.cpp:464)
==16218== by 0x74523C3: execute_native_thread_routine (thread.cc:82)
==16218== by 0x76FF258: start_thread (in /usr/lib/libpthread-2.33.so)
==16218== by 0x78155E2: clone (in /usr/lib/libc-2.33.so)
==16218==
==16218== Conditional jump or move depends on uninitialised value(s)
==16218== at 0xCDBC30: MWPhysics::Object::commitPositionChange() (object.cpp:73)
==16218== by 0xCE5B64: MWPhysics::PhysicsTaskScheduler::updatePtrAabb(std::shared_ptr<MWPhysics::PtrHolder> const&) (mtphysics.cpp:446)
==16218== by 0xCE5CC3: operator() (mtphysics.cpp:432)
==16218== by 0xCE5CC3: for_each<std::_Rb_tree_const_iterator<std::shared_ptr<MWPhysics::PtrHolder> >, MWPhysics::PhysicsTaskScheduler::updateAabbs()::<lambda(const std::shared_ptr<MWPhysics::PtrHolder>&)> > (stl_algo.h:3820)
==16218== by 0xCE5CC3: MWPhysics::PhysicsTaskScheduler::updateAabbs() (mtphysics.cpp:431)
==16218== by 0xCE5E35: MWPhysics::PhysicsTaskScheduler::afterPreStep() (mtphysics.cpp:586)
==16218== by 0xCE6238: operator() (mtphysics.cpp:533)
==16218== by 0xCE6238: wait<MWPhysics::PhysicsTaskScheduler::doSimulation()::<lambda()> > (barrier.hpp:33)
==16218== by 0xCE6238: MWPhysics::PhysicsTaskScheduler::doSimulation() (mtphysics.cpp:533)
==16218== by 0xCE6377: MWPhysics::PhysicsTaskScheduler::worker() (mtphysics.cpp:464)
==16218== by 0x74523C3: execute_native_thread_routine (thread.cc:82)
==16218== by 0x76FF258: start_thread (in /usr/lib/libpthread-2.33.so)
==16218== by 0x78155E2: clone (in /usr/lib/libc-2.33.so)
==16218==
To reduce amount of computations on the caller side and restrict possible
values.
* verts can't be non-int because it's a number of things.
* worldsize is initially defined as int by ESM::Land::REAL_SIZE.
* Put function to calculate heightfied shift into components to be able to
reuse by other binaries.
We just can no longer use the former ptr.getTypeName() as a fallback, but I do not suppose it matters. This value was an implementation defined string that usually contained a garbled mess.
Probably we should additionally refactor Lua types completely now that we have Ptr::getType(). I will leave this up to MWLua developers.
Currently, we use a peculiar mapping of ESM classes by their std::type_info::name. This mapping is an undefined behaviour because std::type_info::name is strictly implementation defined. It could return a non-unique value on some platforms. With this PR we use the unsigned int sRecordId of the ESM class as a more efficient lookup type that does not build on undefined behaviour. We can expect marginally faster save-game loading with these changes as well.