From e34e1b1c95779e7d569fa03120d0a6083f0864ee Mon Sep 17 00:00:00 2001 From: lat9nq <22451773+lat9nq@users.noreply.github.com> Date: Sat, 17 Jun 2023 00:36:00 -0400 Subject: [PATCH] k_thread: Use a mutex and cond_var to sync bool std::atomic is broken on MinGW and causes deadlocks there. Use a normal cond var in its stead. --- src/core/hle/kernel/k_thread.cpp | 15 +++++++++++---- src/core/hle/kernel/k_thread.h | 4 +++- 2 files changed, 14 insertions(+), 5 deletions(-) diff --git a/src/core/hle/kernel/k_thread.cpp b/src/core/hle/kernel/k_thread.cpp index 70480b725..908811e2c 100644 --- a/src/core/hle/kernel/k_thread.cpp +++ b/src/core/hle/kernel/k_thread.cpp @@ -4,6 +4,8 @@ #include #include #include +#include +#include #include #include @@ -1313,7 +1315,8 @@ void KThread::RequestDummyThreadWait() { ASSERT(this->IsDummyThread()); // We will block when the scheduler lock is released. - m_dummy_thread_runnable.store(false); + std::scoped_lock lock{m_dummy_thread_mutex}; + m_dummy_thread_runnable = false; } void KThread::DummyThreadBeginWait() { @@ -1323,7 +1326,8 @@ void KThread::DummyThreadBeginWait() { } // Block until runnable is no longer false. - m_dummy_thread_runnable.wait(false); + std::unique_lock lock{m_dummy_thread_mutex}; + m_dummy_thread_cv.wait(lock, [this] { return m_dummy_thread_runnable; }); } void KThread::DummyThreadEndWait() { @@ -1331,8 +1335,11 @@ void KThread::DummyThreadEndWait() { ASSERT(this->IsDummyThread()); // Wake up the waiting thread. - m_dummy_thread_runnable.store(true); - m_dummy_thread_runnable.notify_one(); + { + std::scoped_lock lock{m_dummy_thread_mutex}; + m_dummy_thread_runnable = true; + } + m_dummy_thread_cv.notify_one(); } void KThread::BeginWait(KThreadQueue* queue) { diff --git a/src/core/hle/kernel/k_thread.h b/src/core/hle/kernel/k_thread.h index f9814ac8f..37fe5db77 100644 --- a/src/core/hle/kernel/k_thread.h +++ b/src/core/hle/kernel/k_thread.h @@ -892,7 +892,9 @@ private: std::shared_ptr m_host_context{}; ThreadType m_thread_type{}; StepState m_step_state{}; - std::atomic m_dummy_thread_runnable{true}; + bool m_dummy_thread_runnable{true}; + std::mutex m_dummy_thread_mutex{}; + std::condition_variable m_dummy_thread_cv{}; // For debugging std::vector m_wait_objects_for_debugging{};