From 994f4977810749c0b597e7a7531a02d907967a68 Mon Sep 17 00:00:00 2001 From: comex Date: Sun, 22 Nov 2020 16:05:18 -0500 Subject: Overhaul EmuWindow::PollEvents to fix yuzu-cmd calling SDL_PollEvents off main thread EmuWindow::PollEvents was called from the GPU thread (or the CPU thread in sync-GPU mode) when swapping buffers. It had three implementations: - In GRenderWindow, it didn't actually poll events, just set a flag and emit a signal to indicate that a frame was displayed. - In EmuWindow_SDL2_Hide, it did nothing. - In EmuWindow_SDL2, it did call SDL_PollEvents, but this is wrong because SDL_PollEvents is supposed to be called on the thread that set up video - in this case, the main thread, which was sleeping in a busyloop (regardless of whether sync-GPU was enabled). On macOS this causes a crash. To fix this: - Rename EmuWindow::PollEvents to OnFrameDisplayed, and give it a default implementation that does nothing. - In EmuWindow_SDL2, do not override OnFrameDisplayed, but instead have the main thread call SDL_WaitEvent in a loop. --- src/core/frontend/emu_window.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'src/core/frontend') diff --git a/src/core/frontend/emu_window.h b/src/core/frontend/emu_window.h index 3e8780243..276d2b906 100644 --- a/src/core/frontend/emu_window.h +++ b/src/core/frontend/emu_window.h @@ -102,8 +102,8 @@ public: float render_surface_scale = 1.0f; }; - /// Polls window events - virtual void PollEvents() = 0; + /// Called from GPU thread when a frame is displayed. + virtual void OnFrameDisplayed() {} /** * Returns a GraphicsContext that the frontend provides to be used for rendering. -- cgit v1.2.3