Add a mutex to allow preventing buffer recreation

app/src/main/cpp/skyline/gpu/buffer_manager.cpp

@@ -64,6 +64,7 @@ namespace skyline::gpu {
     }
 
     BufferManager::LockedBuffer BufferManager::CoalesceBuffers(span<u8> range, const LockedBuffers &srcBuffers, ContextTag tag) {
+        std::scoped_lock lock{recreationMutex};
         if (!range.valid())
             range = span<u8>{srcBuffers.front().buffer->guest->begin(), srcBuffers.back().buffer->guest->end()};
 

app/src/main/cpp/skyline/gpu/buffer_manager.h

@@ -70,6 +70,8 @@ namespace skyline::gpu {
         static bool BufferLessThan(const std::shared_ptr<Buffer> &it, u8 *pointer);
 
       public:
+        std::mutex recreationMutex;
+
         BufferManager(GPU &gpu);
 
         /**