From 615fb40416b9ee10abf40a036b31d1540886a9b8 Mon Sep 17 00:00:00 2001 From: bunnei Date: Fri, 21 Jan 2022 17:10:11 -0800 Subject: hle: kernel: KThread: Ensure host (dummy) threads block on locking. - But do not enter the priority queue, as otherwise they will be scheduled. - Allows dummy threads to use guest synchronization primitives. --- src/core/hle/kernel/k_thread.h | 13 +++++++++++++ 1 file changed, 13 insertions(+) (limited to 'src/core/hle/kernel/k_thread.h') diff --git a/src/core/hle/kernel/k_thread.h b/src/core/hle/kernel/k_thread.h index 77b53a198..d058db62c 100644 --- a/src/core/hle/kernel/k_thread.h +++ b/src/core/hle/kernel/k_thread.h @@ -558,6 +558,10 @@ public: return thread_type; } + [[nodiscard]] bool IsDummyThread() const { + return GetThreadType() == ThreadType::Dummy; + } + void SetWaitObjectsForDebugging(const std::span& objects) { wait_objects_for_debugging.clear(); wait_objects_for_debugging.reserve(objects.size()); @@ -632,6 +636,14 @@ public: return condvar_key; } + // Dummy threads (used for HLE host threads) cannot wait based on the guest scheduler, and + // therefore will not block on guest kernel synchronization primitives. These methods handle + // blocking as needed. + + void IfDummyThreadTryWait(); + void IfDummyThreadBeginWait(); + void IfDummyThreadEndWait(); + private: static constexpr size_t PriorityInheritanceCountMax = 10; union SyncObjectBuffer { @@ -750,6 +762,7 @@ private: bool resource_limit_release_hint{}; StackParameters stack_parameters{}; KSpinLock context_guard{}; + KSpinLock dummy_wait_lock{}; // For emulation std::shared_ptr host_context{}; -- cgit v1.2.3