Commit 774bca932e2f84ec6af3737b2448ba7ab2a56435
2025-10-08T18:41:13
[metal] Add commands scheduled sync object We need a thread-safe way to wait for ANGLE Metal command buffers to be scheduled for IOSurface synchronization with DrDC + Graphite on Mac. The existing eglWaitUntilWorkScheduledANGLE API isn't thread-safe as it reaches into ContextMtl innards to flush the command buffer. This CL adds the EGL_ANGLE_metal_commands_scheduled_sync extension which introduces a EGL_SYNC_METAL_COMMANDS_SCHEDULED_ANGLE sync object type. This sync object is signaled when pending Metal commands are scheduled to run on the GPU (MTLCommandBufferStatusScheduled). These sync objects are thread-safe - eglClientWaitSync() can be called on any thread even without a current context which is needed for DrDC + Graphite on Mac. Bug: chromium:444702048 Change-Id: Ia13b352385a6fefaa026526ef74f6e596a6a6964 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/7027996 Auto-Submit: Sunny Sachanandani <sunnyps@chromium.org> Reviewed-by: Quyen Le <lehoangquyen@chromium.org> Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org> Commit-Queue: Sunny Sachanandani <sunnyps@chromium.org>