15 files changed, 92 insertions, 48 deletions

diff --git a/src/core/CMakeLists.txt b/src/core/CMakeLists.txt
index 5f6dce52a..eb1fbcb61 100644
--- a/src/core/CMakeLists.txt
+++ b/src/core/CMakeLists.txt
@@ -159,6 +159,7 @@ add_library(core STATIC
     hle/kernel/k_scheduler.cpp
     hle/kernel/k_scheduler.h
     hle/kernel/k_scheduler_lock.h
+    hle/kernel/k_scoped_lock.h
     hle/kernel/k_scoped_scheduler_lock_and_sleep.h
     hle/kernel/kernel.cpp
     hle/kernel/kernel.h
diff --git a/src/core/hle/kernel/address_arbiter.cpp b/src/core/hle/kernel/address_arbiter.cpp
index ac4913173..20ffa7d47 100644
--- a/src/core/hle/kernel/address_arbiter.cpp
+++ b/src/core/hle/kernel/address_arbiter.cpp
@@ -59,7 +59,7 @@ ResultCode AddressArbiter::SignalToAddress(VAddr address, SignalType type, s32 v
 }
 
 ResultCode AddressArbiter::SignalToAddressOnly(VAddr address, s32 num_to_wake) {
-    SchedulerLock lock(system.Kernel());
+    KScopedSchedulerLock lock(system.Kernel());
     const std::vector<std::shared_ptr<Thread>> waiting_threads =
         GetThreadsWaitingOnAddress(address);
     WakeThreads(waiting_threads, num_to_wake);
@@ -68,7 +68,7 @@ ResultCode AddressArbiter::SignalToAddressOnly(VAddr address, s32 num_to_wake) {
 
 ResultCode AddressArbiter::IncrementAndSignalToAddressIfEqual(VAddr address, s32 value,
                                                               s32 num_to_wake) {
-    SchedulerLock lock(system.Kernel());
+    KScopedSchedulerLock lock(system.Kernel());
     auto& memory = system.Memory();
 
     // Ensure that we can write to the address.
@@ -93,7 +93,7 @@ ResultCode AddressArbiter::IncrementAndSignalToAddressIfEqual(VAddr address, s32
 
 ResultCode AddressArbiter::ModifyByWaitingCountAndSignalToAddressIfEqual(VAddr address, s32 value,
                                                                          s32 num_to_wake) {
-    SchedulerLock lock(system.Kernel());
+    KScopedSchedulerLock lock(system.Kernel());
     auto& memory = system.Memory();
 
     // Ensure that we can write to the address.
@@ -211,7 +211,7 @@ ResultCode AddressArbiter::WaitForAddressIfLessThan(VAddr address, s32 value, s6
     }
 
     {
-        SchedulerLock lock(kernel);
+        KScopedSchedulerLock lock(kernel);
         if (current_thread->IsWaitingForArbitration()) {
             RemoveThread(SharedFrom(current_thread));
             current_thread->WaitForArbitration(false);
@@ -266,7 +266,7 @@ ResultCode AddressArbiter::WaitForAddressIfEqual(VAddr address, s32 value, s64 t
     }
 
     {
-        SchedulerLock lock(kernel);
+        KScopedSchedulerLock lock(kernel);
         if (current_thread->IsWaitingForArbitration()) {
             RemoveThread(SharedFrom(current_thread));
             current_thread->WaitForArbitration(false);
diff --git a/src/core/hle/kernel/global_scheduler_context.h b/src/core/hle/kernel/global_scheduler_context.h
index 39c383746..c4bc23eed 100644
--- a/src/core/hle/kernel/global_scheduler_context.h
+++ b/src/core/hle/kernel/global_scheduler_context.h
@@ -27,6 +27,8 @@ class GlobalSchedulerContext final {
     friend class KScheduler;
 
 public:
+    using LockType = KAbstractSchedulerLock<KScheduler>;
+
     explicit GlobalSchedulerContext(KernelCore& kernel);
     ~GlobalSchedulerContext();
 
@@ -53,8 +55,16 @@ public:
     /// Returns true if the global scheduler lock is acquired
     bool IsLocked() const;
 
+    LockType& SchedulerLock() {
+        return scheduler_lock;
+    }
+
+    const LockType& SchedulerLock() const {
+        return scheduler_lock;
+    }
+
 private:
-    friend class SchedulerLock;
+    friend class KScopedSchedulerLock;
     friend class KScopedSchedulerLockAndSleep;
 
     KernelCore& kernel;
diff --git a/src/core/hle/kernel/k_scheduler.cpp b/src/core/hle/kernel/k_scheduler.cpp
index 466147498..9645fee22 100644
--- a/src/core/hle/kernel/k_scheduler.cpp
+++ b/src/core/hle/kernel/k_scheduler.cpp
@@ -410,7 +410,7 @@ void KScheduler::YieldWithoutCoreMigration() {
 
     /* Perform the yield. */
     {
-        SchedulerLock lock(kernel);
+        KScopedSchedulerLock lock(kernel);
 
         const auto cur_state = cur_thread.scheduling_state;
         if (cur_state == static_cast<u32>(ThreadSchedStatus::Runnable)) {
@@ -451,7 +451,7 @@ void KScheduler::YieldWithCoreMigration() {
 
     /* Perform the yield. */
     {
-        SchedulerLock lock(kernel);
+        KScopedSchedulerLock lock(kernel);
 
         const auto cur_state = cur_thread.scheduling_state;
         if (cur_state == static_cast<u32>(ThreadSchedStatus::Runnable)) {
@@ -541,7 +541,7 @@ void KScheduler::YieldToAnyThread() {
 
     /* Perform the yield. */
     {
-        SchedulerLock lock(kernel);
+        KScopedSchedulerLock lock(kernel);
 
         const auto cur_state = cur_thread.scheduling_state;
         if (cur_state == static_cast<u32>(ThreadSchedStatus::Runnable)) {
@@ -793,12 +793,9 @@ void KScheduler::Initialize() {
     }
 }
 
-SchedulerLock::SchedulerLock(KernelCore& kernel) : kernel{kernel} {
-    kernel.GlobalSchedulerContext().Lock();
-}
+KScopedSchedulerLock::KScopedSchedulerLock(KernelCore& kernel)
+    : KScopedLock(kernel.GlobalSchedulerContext().SchedulerLock()) {}
 
-SchedulerLock::~SchedulerLock() {
-    kernel.GlobalSchedulerContext().Unlock();
-}
+KScopedSchedulerLock::~KScopedSchedulerLock() = default;
 
 } // namespace Kernel
diff --git a/src/core/hle/kernel/k_scheduler.h b/src/core/hle/kernel/k_scheduler.h
index 5ba0f3c32..d52ecc0db 100644
--- a/src/core/hle/kernel/k_scheduler.h
+++ b/src/core/hle/kernel/k_scheduler.h
@@ -14,6 +14,7 @@
 #include "core/hle/kernel/global_scheduler_context.h"
 #include "core/hle/kernel/k_priority_queue.h"
 #include "core/hle/kernel/k_scheduler_lock.h"
+#include "core/hle/kernel/k_scoped_lock.h"
 
 namespace Common {
 class Fiber;
@@ -198,13 +199,10 @@ private:
     Common::SpinLock guard{};
 };
 
-class SchedulerLock {
+class KScopedSchedulerLock : KScopedLock<GlobalSchedulerContext::LockType> {
 public:
-    [[nodiscard]] explicit SchedulerLock(KernelCore& kernel);
-    ~SchedulerLock();
-
-protected:
-    KernelCore& kernel;
+    explicit KScopedSchedulerLock(KernelCore& kernel);
+    ~KScopedSchedulerLock();
 };
 
 } // namespace Kernel
diff --git a/src/core/hle/kernel/k_scoped_lock.h b/src/core/hle/kernel/k_scoped_lock.h
new file mode 100644
index 000000000..03320859f
--- /dev/null
+++ b/src/core/hle/kernel/k_scoped_lock.h
@@ -0,0 +1,39 @@
+// Copyright 2020 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+// This file references various implementation details from Atmosphere, an open-source firmware for
+// the Nintendo Switch. Copyright 2018-2020 Atmosphere-NX.
+
+#pragma once
+
+#include "common/common_types.h"
+
+namespace Kernel {
+
+template <typename T>
+concept KLockable = !std::is_reference<T>::value && requires(T & t) {
+    { t.Lock() }
+    ->std::same_as<void>;
+    { t.Unlock() }
+    ->std::same_as<void>;
+};
+
+template <typename T>
+requires KLockable<T> class KScopedLock : NonCopyable {
+
+private:
+    T* lock_ptr;
+
+public:
+    explicit KScopedLock(T* l) : lock_ptr(l) {
+        this->lock_ptr->Lock();
+    }
+    explicit KScopedLock(T& l) : KScopedLock(std::addressof(l)) { /* ... */
+    }
+    ~KScopedLock() {
+        this->lock_ptr->Unlock();
+    }
+};
+
+} // namespace Kernel
diff --git a/src/core/hle/kernel/kernel.cpp b/src/core/hle/kernel/kernel.cpp
index b74e34c40..04cae3a43 100644
--- a/src/core/hle/kernel/kernel.cpp
+++ b/src/core/hle/kernel/kernel.cpp
@@ -146,7 +146,7 @@ struct KernelCore::Impl {
         preemption_event = Core::Timing::CreateEvent(
             "PreemptionCallback", [this, &kernel](std::uintptr_t, std::chrono::nanoseconds) {
                 {
-                    SchedulerLock lock(kernel);
+                    KScopedSchedulerLock lock(kernel);
                     global_scheduler_context->PreemptThreads();
                 }
                 const auto time_interval = std::chrono::nanoseconds{
@@ -612,7 +612,7 @@ const Kernel::SharedMemory& KernelCore::GetTimeSharedMem() const {
 void KernelCore::Suspend(bool in_suspention) {
     const bool should_suspend = exception_exited || in_suspention;
     {
-        SchedulerLock lock(*this);
+        KScopedSchedulerLock lock(*this);
         ThreadStatus status = should_suspend ? ThreadStatus::Ready : ThreadStatus::WaitSleep;
         for (std::size_t i = 0; i < Core::Hardware::NUM_CPU_CORES; i++) {
             impl->suspend_threads[i]->SetStatus(status);
diff --git a/src/core/hle/kernel/mutex.cpp b/src/core/hle/kernel/mutex.cpp
index 6299b1342..4f8075e0e 100644
--- a/src/core/hle/kernel/mutex.cpp
+++ b/src/core/hle/kernel/mutex.cpp
@@ -75,7 +75,7 @@ ResultCode Mutex::TryAcquire(VAddr address, Handle holding_thread_handle,
     std::shared_ptr<Thread> current_thread =
         SharedFrom(kernel.CurrentScheduler()->GetCurrentThread());
     {
-        SchedulerLock lock(kernel);
+        KScopedSchedulerLock lock(kernel);
         // The mutex address must be 4-byte aligned
         if ((address % sizeof(u32)) != 0) {
             return ERR_INVALID_ADDRESS;
@@ -114,7 +114,7 @@ ResultCode Mutex::TryAcquire(VAddr address, Handle holding_thread_handle,
     }
 
     {
-        SchedulerLock lock(kernel);
+        KScopedSchedulerLock lock(kernel);
         auto* owner = current_thread->GetLockOwner();
         if (owner != nullptr) {
             owner->RemoveMutexWaiter(current_thread);
@@ -153,7 +153,7 @@ std::pair<ResultCode, std::shared_ptr<Thread>> Mutex::Unlock(std::shared_ptr<Thr
 
 ResultCode Mutex::Release(VAddr address) {
     auto& kernel = system.Kernel();
-    SchedulerLock lock(kernel);
+    KScopedSchedulerLock lock(kernel);
 
     std::shared_ptr<Thread> current_thread =
         SharedFrom(kernel.CurrentScheduler()->GetCurrentThread());
diff --git a/src/core/hle/kernel/process.cpp b/src/core/hle/kernel/process.cpp
index 238c03a13..b905b486a 100644
--- a/src/core/hle/kernel/process.cpp
+++ b/src/core/hle/kernel/process.cpp
@@ -54,7 +54,7 @@ void SetupMainThread(Core::System& system, Process& owner_process, u32 priority,
     auto& kernel = system.Kernel();
     // Threads by default are dormant, wake up the main thread so it runs when the scheduler fires
     {
-        SchedulerLock lock{kernel};
+        KScopedSchedulerLock lock{kernel};
         thread->SetStatus(ThreadStatus::Ready);
     }
 }
@@ -213,7 +213,7 @@ void Process::UnregisterThread(const Thread* thread) {
 }
 
 ResultCode Process::ClearSignalState() {
-    SchedulerLock lock(system.Kernel());
+    KScopedSchedulerLock lock(system.Kernel());
     if (status == ProcessStatus::Exited) {
         LOG_ERROR(Kernel, "called on a terminated process instance.");
         return ERR_INVALID_STATE;
@@ -347,7 +347,7 @@ static auto FindTLSPageWithAvailableSlots(std::vector<TLSPage>& tls_pages) {
 }
 
 VAddr Process::CreateTLSRegion() {
-    SchedulerLock lock(system.Kernel());
+    KScopedSchedulerLock lock(system.Kernel());
     if (auto tls_page_iter{FindTLSPageWithAvailableSlots(tls_pages)};
         tls_page_iter != tls_pages.cend()) {
         return *tls_page_iter->ReserveSlot();
@@ -378,7 +378,7 @@ VAddr Process::CreateTLSRegion() {
 }
 
 void Process::FreeTLSRegion(VAddr tls_address) {
-    SchedulerLock lock(system.Kernel());
+    KScopedSchedulerLock lock(system.Kernel());
     const VAddr aligned_address = Common::AlignDown(tls_address, Core::Memory::PAGE_SIZE);
     auto iter =
         std::find_if(tls_pages.begin(), tls_pages.end(), [aligned_address](const auto& page) {
diff --git a/src/core/hle/kernel/readable_event.cpp b/src/core/hle/kernel/readable_event.cpp
index 927f88fed..cea262ce0 100644
--- a/src/core/hle/kernel/readable_event.cpp
+++ b/src/core/hle/kernel/readable_event.cpp
@@ -39,7 +39,7 @@ void ReadableEvent::Clear() {
 }
 
 ResultCode ReadableEvent::Reset() {
-    SchedulerLock lock(kernel);
+    KScopedSchedulerLock lock(kernel);
     if (!is_signaled) {
         LOG_TRACE(Kernel, "Handle is not signaled! object_id={}, object_type={}, object_name={}",
                   GetObjectId(), GetTypeName(), GetName());
diff --git a/src/core/hle/kernel/server_session.cpp b/src/core/hle/kernel/server_session.cpp
index bf2c90028..78e41b13e 100644
--- a/src/core/hle/kernel/server_session.cpp
+++ b/src/core/hle/kernel/server_session.cpp
@@ -171,7 +171,7 @@ ResultCode ServerSession::CompleteSyncRequest() {
 
     // Some service requests require the thread to block
     {
-        SchedulerLock lock(kernel);
+        KScopedSchedulerLock lock(kernel);
         if (!context.IsThreadWaiting()) {
             context.GetThread().ResumeFromWait();
             context.GetThread().SetSynchronizationResults(nullptr, result);
diff --git a/src/core/hle/kernel/svc.cpp b/src/core/hle/kernel/svc.cpp
index 2760a307c..30d60aeb6 100644
--- a/src/core/hle/kernel/svc.cpp
+++ b/src/core/hle/kernel/svc.cpp
@@ -345,7 +345,7 @@ static ResultCode SendSyncRequest(Core::System& system, Handle handle) {
 
     auto thread = kernel.CurrentScheduler()->GetCurrentThread();
     {
-        SchedulerLock lock(kernel);
+        KScopedSchedulerLock lock(kernel);
         thread->InvalidateHLECallback();
         thread->SetStatus(ThreadStatus::WaitIPC);
         session->SendSyncRequest(SharedFrom(thread), system.Memory(), system.CoreTiming());
@@ -359,7 +359,7 @@ static ResultCode SendSyncRequest(Core::System& system, Handle handle) {
         }
 
         {
-            SchedulerLock lock(kernel);
+            KScopedSchedulerLock lock(kernel);
             auto* sync_object = thread->GetHLESyncObject();
             sync_object->RemoveWaitingThread(SharedFrom(thread));
         }
@@ -1691,7 +1691,7 @@ static ResultCode WaitProcessWideKeyAtomic(Core::System& system, VAddr mutex_add
     }
 
     {
-        SchedulerLock lock(kernel);
+        KScopedSchedulerLock lock(kernel);
 
         auto* owner = current_thread->GetLockOwner();
         if (owner != nullptr) {
@@ -1724,7 +1724,7 @@ static void SignalProcessWideKey(Core::System& system, VAddr condition_variable_
 
     // Retrieve a list of all threads that are waiting for this condition variable.
     auto& kernel = system.Kernel();
-    SchedulerLock lock(kernel);
+    KScopedSchedulerLock lock(kernel);
     auto* const current_process = kernel.CurrentProcess();
     std::vector<std::shared_ptr<Thread>> waiting_threads =
         current_process->GetConditionVariableThreads(condition_variable_addr);
diff --git a/src/core/hle/kernel/synchronization.cpp b/src/core/hle/kernel/synchronization.cpp
index 6651ad90c..d3f520ea2 100644
--- a/src/core/hle/kernel/synchronization.cpp
+++ b/src/core/hle/kernel/synchronization.cpp
@@ -19,7 +19,7 @@ Synchronization::Synchronization(Core::System& system) : system{system} {}
 
 void Synchronization::SignalObject(SynchronizationObject& obj) const {
     auto& kernel = system.Kernel();
-    SchedulerLock lock(kernel);
+    KScopedSchedulerLock lock(kernel);
     if (obj.IsSignaled()) {
         for (auto thread : obj.GetWaitingThreads()) {
             if (thread->GetSchedulingStatus() == ThreadSchedStatus::Paused) {
@@ -90,7 +90,7 @@ std::pair<ResultCode, Handle> Synchronization::WaitFor(
     }
 
     {
-        SchedulerLock lock(kernel);
+        KScopedSchedulerLock lock(kernel);
         ResultCode signaling_result = thread->GetSignalingResult();
         SynchronizationObject* signaling_object = thread->GetSignalingObject();
         thread->SetSynchronizationObjects(nullptr);
diff --git a/src/core/hle/kernel/thread.cpp b/src/core/hle/kernel/thread.cpp
index 6f89238ca..a4f9e0d97 100644
--- a/src/core/hle/kernel/thread.cpp
+++ b/src/core/hle/kernel/thread.cpp
@@ -51,7 +51,7 @@ Thread::~Thread() = default;
 
 void Thread::Stop() {
     {
-        SchedulerLock lock(kernel);
+        KScopedSchedulerLock lock(kernel);
         SetStatus(ThreadStatus::Dead);
         Signal();
         kernel.GlobalHandleTable().Close(global_handle);
@@ -68,7 +68,7 @@ void Thread::Stop() {
 }
 
 void Thread::ResumeFromWait() {
-    SchedulerLock lock(kernel);
+    KScopedSchedulerLock lock(kernel);
     switch (status) {
     case ThreadStatus::Paused:
     case ThreadStatus::WaitSynch:
@@ -100,19 +100,18 @@ void Thread::ResumeFromWait() {
 }
 
 void Thread::OnWakeUp() {
-    SchedulerLock lock(kernel);
-
+    KScopedSchedulerLock lock(kernel);
     SetStatus(ThreadStatus::Ready);
 }
 
 ResultCode Thread::Start() {
-    SchedulerLock lock(kernel);
+    KScopedSchedulerLock lock(kernel);
     SetStatus(ThreadStatus::Ready);
     return RESULT_SUCCESS;
 }
 
 void Thread::CancelWait() {
-    SchedulerLock lock(kernel);
+    KScopedSchedulerLock lock(kernel);
     if (GetSchedulingStatus() != ThreadSchedStatus::Paused || !is_waiting_on_sync) {
         is_sync_cancelled = true;
         return;
@@ -228,7 +227,7 @@ ResultVal<std::shared_ptr<Thread>> Thread::Create(Core::System& system, ThreadTy
 }
 
 void Thread::SetPriority(u32 priority) {
-    SchedulerLock lock(kernel);
+    KScopedSchedulerLock lock(kernel);
     ASSERT_MSG(priority <= THREADPRIO_LOWEST && priority >= THREADPRIO_HIGHEST,
                "Invalid priority value.");
     nominal_priority = priority;
@@ -365,7 +364,7 @@ bool Thread::InvokeHLECallback(std::shared_ptr<Thread> thread) {
 }
 
 ResultCode Thread::SetActivity(ThreadActivity value) {
-    SchedulerLock lock(kernel);
+    KScopedSchedulerLock lock(kernel);
 
     auto sched_status = GetSchedulingStatus();
 
@@ -435,7 +434,7 @@ void Thread::SetCurrentPriority(u32 new_priority) {
 }
 
 ResultCode Thread::SetCoreAndAffinityMask(s32 new_core, u64 new_affinity_mask) {
-    SchedulerLock lock(kernel);
+    KScopedSchedulerLock lock(kernel);
     const auto HighestSetCore = [](u64 mask, u32 max_cores) {
         for (s32 core = static_cast<s32>(max_cores - 1); core >= 0; core--) {
             if (((mask >> core) & 1) != 0) {
diff --git a/src/core/hle/kernel/time_manager.cpp b/src/core/hle/kernel/time_manager.cpp
index 8e4769694..aea53cdb0 100644
--- a/src/core/hle/kernel/time_manager.cpp
+++ b/src/core/hle/kernel/time_manager.cpp
@@ -18,7 +18,7 @@ TimeManager::TimeManager(Core::System& system_) : system{system_} {
     time_manager_event_type = Core::Timing::CreateEvent(
         "Kernel::TimeManagerCallback",
         [this](std::uintptr_t thread_handle, std::chrono::nanoseconds) {
-            const SchedulerLock lock(system.Kernel());
+            const KScopedSchedulerLock lock(system.Kernel());
             const auto proper_handle = static_cast<Handle>(thread_handle);
             if (cancelled_events[proper_handle]) {
                 return;