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nvflinger: Mark interface functions with return values as [[nodiscard]]
Not using the return value of these functions are undeniably the source of a bug. This way we allow compilers to loudly make any future misuses evident.
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@ -54,12 +54,12 @@ public:
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/// Opens the specified display and returns the ID.
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///
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/// If an invalid display name is provided, then an empty optional is returned.
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std::optional<u64> OpenDisplay(std::string_view name);
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[[nodiscard]] std::optional<u64> OpenDisplay(std::string_view name);
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/// Creates a layer on the specified display and returns the layer ID.
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///
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/// If an invalid display ID is specified, then an empty optional is returned.
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std::optional<u64> CreateLayer(u64 display_id);
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[[nodiscard]] std::optional<u64> CreateLayer(u64 display_id);
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/// Closes a layer on all displays for the given layer ID.
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void CloseLayer(u64 layer_id);
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@ -67,41 +67,39 @@ public:
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/// Finds the buffer queue ID of the specified layer in the specified display.
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///
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/// If an invalid display ID or layer ID is provided, then an empty optional is returned.
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std::optional<u32> FindBufferQueueId(u64 display_id, u64 layer_id) const;
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[[nodiscard]] std::optional<u32> FindBufferQueueId(u64 display_id, u64 layer_id) const;
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/// Gets the vsync event for the specified display.
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///
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/// If an invalid display ID is provided, then nullptr is returned.
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std::shared_ptr<Kernel::ReadableEvent> FindVsyncEvent(u64 display_id) const;
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[[nodiscard]] std::shared_ptr<Kernel::ReadableEvent> FindVsyncEvent(u64 display_id) const;
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/// Obtains a buffer queue identified by the ID.
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BufferQueue& FindBufferQueue(u32 id);
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[[nodiscard]] BufferQueue& FindBufferQueue(u32 id);
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/// Obtains a buffer queue identified by the ID.
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const BufferQueue& FindBufferQueue(u32 id) const;
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[[nodiscard]] const BufferQueue& FindBufferQueue(u32 id) const;
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/// Performs a composition request to the emulated nvidia GPU and triggers the vsync events when
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/// finished.
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void Compose();
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s64 GetNextTicks() const;
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[[nodiscard]] s64 GetNextTicks() const;
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std::unique_lock<std::mutex> Lock() const {
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return std::unique_lock{*guard};
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}
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[[nodiscard]] std::unique_lock<std::mutex> Lock() const { return std::unique_lock{*guard}; }
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private:
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/// Finds the display identified by the specified ID.
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VI::Display* FindDisplay(u64 display_id);
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private :
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/// Finds the display identified by the specified ID.
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[[nodiscard]] VI::Display* FindDisplay(u64 display_id);
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/// Finds the display identified by the specified ID.
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const VI::Display* FindDisplay(u64 display_id) const;
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[[nodiscard]] const VI::Display* FindDisplay(u64 display_id) const;
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/// Finds the layer identified by the specified ID in the desired display.
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VI::Layer* FindLayer(u64 display_id, u64 layer_id);
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[[nodiscard]] VI::Layer* FindLayer(u64 display_id, u64 layer_id);
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/// Finds the layer identified by the specified ID in the desired display.
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const VI::Layer* FindLayer(u64 display_id, u64 layer_id) const;
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[[nodiscard]] const VI::Layer* FindLayer(u64 display_id, u64 layer_id) const;
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static void VSyncThread(NVFlinger& nv_flinger);
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