1 files changed, 41 insertions, 5 deletions
diff --git a/src/core/hle/service/nvflinger/buffer_queue.cpp b/src/core/hle/service/nvflinger/buffer_queue.cpp
index 377f47e8e..c68905e19 100644
--- a/src/core/hle/service/nvflinger/buffer_queue.cpp
+++ b/src/core/hle/service/nvflinger/buffer_queue.cpp
@@ -25,7 +25,12 @@ void BufferQueue::SetPreallocatedBuffer(u32 slot, const IGBPBuffer& igbp_buffer)
     ASSERT(slot < buffer_slots);
     LOG_WARNING(Service, "Adding graphics buffer {}", slot);
 
-    free_buffers.push_back(slot);
+    {
+        std::unique_lock lock{free_buffers_mutex};
+        free_buffers.push_back(slot);
+    }
+    free_buffers_condition.notify_one();
+
     buffers[slot] = {
         .slot = slot,
         .status = Buffer::Status::Free,
@@ -41,10 +46,20 @@ void BufferQueue::SetPreallocatedBuffer(u32 slot, const IGBPBuffer& igbp_buffer)
 
 std::optional<std::pair<u32, Service::Nvidia::MultiFence*>> BufferQueue::DequeueBuffer(u32 width,
                                                                                        u32 height) {
+    // Wait for first request before trying to dequeue
+    {
+        std::unique_lock lock{free_buffers_mutex};
+        free_buffers_condition.wait(lock, [this] { return !free_buffers.empty() || !is_connect; });
+    }
 
-    if (free_buffers.empty()) {
+    if (!is_connect) {
+        // Buffer was disconnected while the thread was blocked, this is most likely due to
+        // emulation being stopped
         return std::nullopt;
     }
+
+    std::unique_lock lock{free_buffers_mutex};
+
     auto f_itr = free_buffers.begin();
     auto slot = buffers.size();
 
@@ -85,6 +100,7 @@ void BufferQueue::QueueBuffer(u32 slot, BufferTransformFlags transform,
     buffers[slot].crop_rect = crop_rect;
     buffers[slot].swap_interval = swap_interval;
     buffers[slot].multi_fence = multi_fence;
+    std::unique_lock lock{queue_sequence_mutex};
     queue_sequence.push_back(slot);
 }
 
@@ -97,12 +113,17 @@ void BufferQueue::CancelBuffer(u32 slot, const Service::Nvidia::MultiFence& mult
     buffers[slot].multi_fence = multi_fence;
     buffers[slot].swap_interval = 0;
 
-    free_buffers.push_back(slot);
+    {
+        std::unique_lock lock{free_buffers_mutex};
+        free_buffers.push_back(slot);
+    }
+    free_buffers_condition.notify_one();
 
     buffer_wait_event.writable->Signal();
 }
 
 std::optional<std::reference_wrapper<const BufferQueue::Buffer>> BufferQueue::AcquireBuffer() {
+    std::unique_lock lock{queue_sequence_mutex};
     std::size_t buffer_slot = buffers.size();
     // Iterate to find a queued buffer matching the requested slot.
     while (buffer_slot == buffers.size() && !queue_sequence.empty()) {
@@ -127,15 +148,30 @@ void BufferQueue::ReleaseBuffer(u32 slot) {
     ASSERT(buffers[slot].slot == slot);
 
     buffers[slot].status = Buffer::Status::Free;
-    free_buffers.push_back(slot);
+    {
+        std::unique_lock lock{free_buffers_mutex};
+        free_buffers.push_back(slot);
+    }
+    free_buffers_condition.notify_one();
 
     buffer_wait_event.writable->Signal();
 }
 
+void BufferQueue::Connect() {
+    std::unique_lock lock{queue_sequence_mutex};
+    queue_sequence.clear();
+    is_connect = true;
+}
+
 void BufferQueue::Disconnect() {
     buffers.fill({});
-    queue_sequence.clear();
+    {
+        std::unique_lock lock{queue_sequence_mutex};
+        queue_sequence.clear();
+    }
     buffer_wait_event.writable->Signal();
+    is_connect = false;
+    free_buffers_condition.notify_one();
 }
 
 u32 BufferQueue::Query(QueryType type) {