move the mutex lock to include the 'getNewManifold', dealing with Issue

bulletphysics#4117
HumanED · Jan 3, 2022 · 5d1c8a2 · 5d1c8a2
1 parent 0ab3b9d
commit 5d1c8a2
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/src/BulletDynamics/Dynamics/btDiscreteDynamicsWorld.cpp b/src/BulletDynamics/Dynamics/btDiscreteDynamicsWorld.cpp
@@ -902,8 +902,8 @@ void btDiscreteDynamicsWorld::createPredictiveContactsInternal(btRigidBody** bod
 						btVector3 distVec = (predictedTrans.getOrigin() - body->getWorldTransform().getOrigin()) * sweepResults.m_closestHitFraction;
 						btScalar distance = distVec.dot(-sweepResults.m_hitNormalWorld);
 
-						btPersistentManifold* manifold = m_dispatcher1->getNewManifold(body, sweepResults.m_hitCollisionObject);
 						btMutexLock(&m_predictiveManifoldsMutex);
+						btPersistentManifold* manifold = m_dispatcher1->getNewManifold(body, sweepResults.m_hitCollisionObject);
 						m_predictiveManifolds.push_back(manifold);
 						btMutexUnlock(&m_predictiveManifoldsMutex);