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Merge branch 'nodeadlock' into 'master'

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Avoid a rare but possible deadlock around mCollisionWorldMutex.

See merge request OpenMW/openmw!525
This commit is contained in:
elsid 2021-01-10 13:41:31 +00:00
commit 8b7f3fe908
1 changed files with 6 additions and 4 deletions
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10
apps/openmw/mwphysics/mtphysics.cpp
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@ -360,7 +360,6 @@ namespace MWPhysics
{
if (!mDeferAabbUpdate || immediate)
{
std::unique_lock lock(mCollisionWorldMutex);
updatePtrAabb(ptr);
}
else
@ -413,7 +412,7 @@ namespace MWPhysics
void PhysicsTaskScheduler::updateAabbs()
{
std::scoped_lock lock(mCollisionWorldMutex, mUpdateAabbMutex);
std::scoped_lock lock(mUpdateAabbMutex);
std::for_each(mUpdateAabb.begin(), mUpdateAabb.end(),
[this](const std::weak_ptr<PtrHolder>& ptr) { updatePtrAabb(ptr); });
mUpdateAabb.clear();
@ -423,6 +422,7 @@ namespace MWPhysics
{
if (const auto p = ptr.lock())
{
std::scoped_lock lock(mCollisionWorldMutex);
if (const auto actor = std::dynamic_pointer_cast<Actor>(p))
{
actor->updateCollisionObjectPosition();
@ -454,10 +454,12 @@ namespace MWPhysics
int job = 0;
while (mRemainingSteps && (job = mNextJob.fetch_add(1, std::memory_order_relaxed)) < mNumJobs)
{
MaybeSharedLock lockColWorld(mCollisionWorldMutex, mThreadSafeBullet);
if(const auto actor = mActorsFrameData[job].mActor.lock())
{
MaybeSharedLock lockColWorld(mCollisionWorldMutex, mThreadSafeBullet);
MovementSolver::move(mActorsFrameData[job], mPhysicsDt, mCollisionWorld.get(), *mWorldFrameData);
}
}
mPostStepBarrier->wait();
@ -481,13 +483,13 @@ namespace MWPhysics
void PhysicsTaskScheduler::updateActorsPositions()
{
std::unique_lock lock(mCollisionWorldMutex);
for (auto& actorData : mActorsFrameData)
{
if(const auto actor = actorData.mActor.lock())
{
if (actor->setPosition(actorData.mPosition))
{
std::scoped_lock lock(mCollisionWorldMutex);
actor->updateCollisionObjectPosition();
mCollisionWorld->updateSingleAabb(actor->getCollisionObject());
}