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[GPU]: Try to fix deadlock

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Gamer64 2025-07-24 14:46:13 +02:00 • committed by crueter
parent 6103d2b7f4
commit eed010964e
1 changed files with 12 additions and 4 deletions
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16
src/video_core/gpu.cpp
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@ -116,9 +116,13 @@ struct GPU::Impl {
template <typename Func>
[[nodiscard]] u64 RequestSyncOperation(Func&& action) {
if (fast_path) {
// Execute immediately, increment fence, skip queueing
// Execute immediately and publish the result
action();
return ++last_sync_fence;
const u64 fence = ++last_sync_fence;
// Mirror the normal path: advance current and wake any waiters
current_sync_fence.store(fence, std::memory_order_release);
sync_request_cv.notify_all();
return fence;
}
std::unique_lock lck{sync_request_mutex};
const u64 fence = ++last_sync_fence;
@ -132,6 +136,10 @@ struct GPU::Impl {
}
void WaitForSyncOperation(const u64 fence) {
if (fast_path) {
// Don’t block when the hack is on
return;
}
std::unique_lock lck{sync_request_mutex};
sync_request_cv.wait(lck, [this, fence] { return CurrentSyncRequestFence() >= fence; });
}
@ -141,9 +149,9 @@ struct GPU::Impl {
if (fast_path) {
// Drain queue without waiting on condition variables
while (!sync_requests.empty()) {
auto req = std::move(sync_requests.front());
auto request = std::move(sync_requests.front());
sync_requests.pop_front();
req();
request();
current_sync_fence.fetch_add(1, std::memory_order_release);
}
return;