early-access version 3136

README.md

@@ -1,7 +1,7 @@
 yuzu emulator early access
 =============
 
-This is the source code for early-access 3133.
+This is the source code for early-access 3136.
 
 ## Legal Notice
 

src/common/fiber.cpp

@@ -1,133 +1,41 @@
 // SPDX-FileCopyrightText: Copyright 2020 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
+#include <mutex>
+
 #include "common/assert.h"
 #include "common/fiber.h"
-#include "common/spin_lock.h"
+#include "common/virtual_buffer.h"
 
-#if defined(_WIN32) || defined(WIN32)
-#include <windows.h>
-#else
 #include <boost/context/detail/fcontext.hpp>
-#endif
 
 namespace Common {
 
 constexpr std::size_t default_stack_size = 512 * 1024;
 
 struct Fiber::FiberImpl {
-    SpinLock guard{};
+    FiberImpl() : stack{default_stack_size}, rewind_stack{default_stack_size} {}
+
+    VirtualBuffer<u8> stack;
+    VirtualBuffer<u8> rewind_stack;
+
+    std::mutex guard;
     std::function<void()> entry_point;
     std::function<void()> rewind_point;
-    void* rewind_parameter{};
     std::shared_ptr<Fiber> previous_fiber;
     bool is_thread_fiber{};
     bool released{};
 
-#if defined(_WIN32) || defined(WIN32)
+    u8* stack_limit{};
-    LPVOID handle = nullptr;
+    u8* rewind_stack_limit{};
-    LPVOID rewind_handle = nullptr;
+    boost::context::detail::fcontext_t context{};
-#else
+    boost::context::detail::fcontext_t rewind_context{};
-    alignas(64) std::array<u8, default_stack_size> stack;
-    alignas(64) std::array<u8, default_stack_size> rewind_stack;
-    u8* stack_limit;
-    u8* rewind_stack_limit;
-    boost::context::detail::fcontext_t context;
-    boost::context::detail::fcontext_t rewind_context;
-#endif
 };
 
 void Fiber::SetRewindPoint(std::function<void()>&& rewind_func) {
     impl->rewind_point = std::move(rewind_func);
 }
 
-#if defined(_WIN32) || defined(WIN32)
-
-void Fiber::Start() {
-    ASSERT(impl->previous_fiber != nullptr);
-    impl->previous_fiber->impl->guard.unlock();
-    impl->previous_fiber.reset();
-    impl->entry_point();
-    UNREACHABLE();
-}
-
-void Fiber::OnRewind() {
-    ASSERT(impl->handle != nullptr);
-    DeleteFiber(impl->handle);
-    impl->handle = impl->rewind_handle;
-    impl->rewind_handle = nullptr;
-    impl->rewind_point();
-    UNREACHABLE();
-}
-
-void Fiber::FiberStartFunc(void* fiber_parameter) {
-    auto* fiber = static_cast<Fiber*>(fiber_parameter);
-    fiber->Start();
-}
-
-void Fiber::RewindStartFunc(void* fiber_parameter) {
-    auto* fiber = static_cast<Fiber*>(fiber_parameter);
-    fiber->OnRewind();
-}
-
-Fiber::Fiber(std::function<void()>&& entry_point_func) : impl{std::make_unique<FiberImpl>()} {
-    impl->entry_point = std::move(entry_point_func);
-    impl->handle = CreateFiber(default_stack_size, &FiberStartFunc, this);
-}
-
-Fiber::Fiber() : impl{std::make_unique<FiberImpl>()} {}
-
-Fiber::~Fiber() {
-    if (impl->released) {
-        return;
-    }
-    // Make sure the Fiber is not being used
-    const bool locked = impl->guard.try_lock();
-    ASSERT_MSG(locked, "Destroying a fiber that's still running");
-    if (locked) {
-        impl->guard.unlock();
-    }
-    DeleteFiber(impl->handle);
-}
-
-void Fiber::Exit() {
-    ASSERT_MSG(impl->is_thread_fiber, "Exitting non main thread fiber");
-    if (!impl->is_thread_fiber) {
-        return;
-    }
-    ConvertFiberToThread();
-    impl->guard.unlock();
-    impl->released = true;
-}
-
-void Fiber::Rewind() {
-    ASSERT(impl->rewind_point);
-    ASSERT(impl->rewind_handle == nullptr);
-    impl->rewind_handle = CreateFiber(default_stack_size, &RewindStartFunc, this);
-    SwitchToFiber(impl->rewind_handle);
-}
-
-void Fiber::YieldTo(std::shared_ptr<Fiber> from, std::shared_ptr<Fiber> to) {
-    ASSERT_MSG(from != nullptr, "Yielding fiber is null!");
-    ASSERT_MSG(to != nullptr, "Next fiber is null!");
-    to->impl->guard.lock();
-    to->impl->previous_fiber = from;
-    SwitchToFiber(to->impl->handle);
-    ASSERT(from->impl->previous_fiber != nullptr);
-    from->impl->previous_fiber->impl->guard.unlock();
-    from->impl->previous_fiber.reset();
-}
-
-std::shared_ptr<Fiber> Fiber::ThreadToFiber() {
-    std::shared_ptr<Fiber> fiber = std::shared_ptr<Fiber>{new Fiber()};
-    fiber->impl->guard.lock();
-    fiber->impl->handle = ConvertThreadToFiber(nullptr);
-    fiber->impl->is_thread_fiber = true;
-    return fiber;
-}
-
-#else
-
 void Fiber::Start(boost::context::detail::transfer_t& transfer) {
     ASSERT(impl->previous_fiber != nullptr);
     impl->previous_fiber->impl->context = transfer.fctx;
@@ -199,17 +107,23 @@ void Fiber::Rewind() {
     boost::context::detail::jump_fcontext(impl->rewind_context, this);
 }
 
-void Fiber::YieldTo(std::shared_ptr<Fiber> from, std::shared_ptr<Fiber> to) {
+void Fiber::YieldTo(std::weak_ptr<Fiber> weak_from, Fiber& to) {
-    ASSERT_MSG(from != nullptr, "Yielding fiber is null!");
+    to.impl->guard.lock();
-    ASSERT_MSG(to != nullptr, "Next fiber is null!");
+    to.impl->previous_fiber = weak_from.lock();
-    to->impl->guard.lock();
+
-    to->impl->previous_fiber = from;
+    auto transfer = boost::context::detail::jump_fcontext(to.impl->context, &to);
-    auto transfer = boost::context::detail::jump_fcontext(to->impl->context, to.get());
+
-    ASSERT(from->impl->previous_fiber != nullptr);
+    // "from" might no longer be valid if the thread was killed
+    if (auto from = weak_from.lock()) {
+        if (from->impl->previous_fiber == nullptr) {
+            ASSERT_MSG(false, "previous_fiber is nullptr!");
+            return;
+        }
         from->impl->previous_fiber->impl->context = transfer.fctx;
         from->impl->previous_fiber->impl->guard.unlock();
         from->impl->previous_fiber.reset();
     }
+}
 
 std::shared_ptr<Fiber> Fiber::ThreadToFiber() {
     std::shared_ptr<Fiber> fiber = std::shared_ptr<Fiber>{new Fiber()};
@@ -218,5 +132,4 @@ std::shared_ptr<Fiber> Fiber::ThreadToFiber() {
     return fiber;
 }
 
-#endif
 } // namespace Common

src/common/fiber.h

@@ -6,11 +6,9 @@
 #include <functional>
 #include <memory>
 
-#if !defined(_WIN32) && !defined(WIN32)
 namespace boost::context::detail {
 struct transfer_t;
 }
-#endif
 
 namespace Common {
 
@@ -42,7 +40,7 @@ public:
 
     /// Yields control from Fiber 'from' to Fiber 'to'
     /// Fiber 'from' must be the currently running fiber.
-    static void YieldTo(std::shared_ptr<Fiber> from, std::shared_ptr<Fiber> to);
+    static void YieldTo(std::weak_ptr<Fiber> weak_from, Fiber& to);
     [[nodiscard]] static std::shared_ptr<Fiber> ThreadToFiber();
 
     void SetRewindPoint(std::function<void()>&& rewind_func);
@@ -52,23 +50,13 @@ public:
     /// Only call from main thread's fiber
     void Exit();
 
-    /// Changes the start parameter of the fiber. Has no effect if the fiber already started
-    void SetStartParameter(void* new_parameter);
-
 private:
     Fiber();
 
-#if defined(_WIN32) || defined(WIN32)
-    void OnRewind();
-    void Start();
-    static void FiberStartFunc(void* fiber_parameter);
-    static void RewindStartFunc(void* fiber_parameter);
-#else
     void OnRewind(boost::context::detail::transfer_t& transfer);
     void Start(boost::context::detail::transfer_t& transfer);
     static void FiberStartFunc(boost::context::detail::transfer_t transfer);
     static void RewindStartFunc(boost::context::detail::transfer_t transfer);
-#endif
 
     struct FiberImpl;
     std::unique_ptr<FiberImpl> impl;

src/core/cpu_manager.cpp

@@ -180,7 +180,7 @@ void CpuManager::ShutdownThread() {
     auto* thread = kernel.GetCurrentEmuThread();
     auto core = is_multicore ? kernel.CurrentPhysicalCoreIndex() : 0;
 
-    Common::Fiber::YieldTo(thread->GetHostContext(), core_data[core].host_context);
+    Common::Fiber::YieldTo(thread->GetHostContext(), *core_data[core].host_context);
     UNREACHABLE();
 }
 
@@ -217,7 +217,7 @@ void CpuManager::RunThread(std::size_t core) {
     auto* thread = scheduler.GetSchedulerCurrentThread();
     Kernel::SetCurrentThread(kernel, thread);
 
-    Common::Fiber::YieldTo(data.host_context, thread->GetHostContext());
+    Common::Fiber::YieldTo(data.host_context, *thread->GetHostContext());
 }
 
 } // namespace Core

src/core/hle/kernel/k_scheduler.cpp

@@ -116,7 +116,7 @@ void KScheduler::PreemptSingleCore() {
     auto& previous_scheduler = kernel.Scheduler(thread->GetCurrentCore());
     previous_scheduler.Unload(thread);
 
-    Common::Fiber::YieldTo(thread->GetHostContext(), m_switch_fiber);
+    Common::Fiber::YieldTo(thread->GetHostContext(), *m_switch_fiber);
 
     GetCurrentThread(kernel).EnableDispatch();
 }
@@ -411,7 +411,7 @@ void KScheduler::ScheduleImpl() {
     m_switch_cur_thread = cur_thread;
     m_switch_highest_priority_thread = highest_priority_thread;
     m_switch_from_schedule = true;
-    Common::Fiber::YieldTo(cur_thread->host_context, m_switch_fiber);
+    Common::Fiber::YieldTo(cur_thread->host_context, *m_switch_fiber);
 
     // Returning from ScheduleImpl occurs after this thread has been scheduled again.
 }
@@ -489,7 +489,7 @@ void KScheduler::ScheduleImplFiber() {
     Reload(highest_priority_thread);
 
     // Reload the host thread.
-    Common::Fiber::YieldTo(m_switch_fiber, highest_priority_thread->host_context);
+    Common::Fiber::YieldTo(m_switch_fiber, *highest_priority_thread->host_context);
 }
 
 void KScheduler::Unload(KThread* thread) {

src/tests/common/fibers.cpp

@@ -50,7 +50,7 @@ public:
             value++;
         }
         results[id] = value;
-        Fiber::YieldTo(work_fibers[id], thread_fibers[id]);
+        Fiber::YieldTo(work_fibers[id], *thread_fibers[id]);
     }
 
     void ExecuteThread(u32 id);
@@ -68,7 +68,7 @@ void TestControl1::ExecuteThread(u32 id) {
     thread_fibers[id] = thread_fiber;
     work_fibers[id] = std::make_shared<Fiber>([this] { DoWork(); });
     items[id] = rand() % 256;
-    Fiber::YieldTo(thread_fibers[id], work_fibers[id]);
+    Fiber::YieldTo(thread_fibers[id], *work_fibers[id]);
     thread_fibers[id]->Exit();
 }
 
@@ -105,11 +105,11 @@ public:
         for (u32 i = 0; i < 12000; i++) {
             value1 += i;
         }
-        Fiber::YieldTo(fiber1, fiber3);
+        Fiber::YieldTo(fiber1, *fiber3);
         const u32 id = thread_ids.Get();
         assert1 = id == 1;
         value2 += 5000;
-        Fiber::YieldTo(fiber1, thread_fibers[id]);
+        Fiber::YieldTo(fiber1, *thread_fibers[id]);
     }
 
     void DoWork2() {
@@ -117,7 +117,7 @@ public:
             ;
         value2 = 2000;
         trap = false;
-        Fiber::YieldTo(fiber2, fiber1);
+        Fiber::YieldTo(fiber2, *fiber1);
         assert3 = false;
     }
 
@@ -125,19 +125,19 @@ public:
         const u32 id = thread_ids.Get();
         assert2 = id == 0;
         value1 += 1000;
-        Fiber::YieldTo(fiber3, thread_fibers[id]);
+        Fiber::YieldTo(fiber3, *thread_fibers[id]);
     }
 
     void ExecuteThread(u32 id);
 
     void CallFiber1() {
         const u32 id = thread_ids.Get();
-        Fiber::YieldTo(thread_fibers[id], fiber1);
+        Fiber::YieldTo(thread_fibers[id], *fiber1);
     }
 
     void CallFiber2() {
         const u32 id = thread_ids.Get();
-        Fiber::YieldTo(thread_fibers[id], fiber2);
+        Fiber::YieldTo(thread_fibers[id], *fiber2);
     }
 
     void Exit();
@@ -207,23 +207,23 @@ public:
 
     void DoWork1() {
         value1 += 1;
-        Fiber::YieldTo(fiber1, fiber2);
+        Fiber::YieldTo(fiber1, *fiber2);
         const u32 id = thread_ids.Get();
         value3 += 1;
-        Fiber::YieldTo(fiber1, thread_fibers[id]);
+        Fiber::YieldTo(fiber1, *thread_fibers[id]);
     }
 
     void DoWork2() {
         value2 += 1;
         const u32 id = thread_ids.Get();
-        Fiber::YieldTo(fiber2, thread_fibers[id]);
+        Fiber::YieldTo(fiber2, *thread_fibers[id]);
     }
 
     void ExecuteThread(u32 id);
 
     void CallFiber1() {
         const u32 id = thread_ids.Get();
-        Fiber::YieldTo(thread_fibers[id], fiber1);
+        Fiber::YieldTo(thread_fibers[id], *fiber1);
     }
 
     void Exit();
@@ -283,7 +283,7 @@ public:
 
     void Execute() {
         thread_fiber = Fiber::ThreadToFiber();
-        Fiber::YieldTo(thread_fiber, fiber1);
+        Fiber::YieldTo(thread_fiber, *fiber1);
         thread_fiber->Exit();
     }
 
@@ -291,7 +291,7 @@ public:
         fiber1->SetRewindPoint([this] { DoWork(); });
         if (rewinded) {
             goal_reached = true;
-            Fiber::YieldTo(fiber1, thread_fiber);
+            Fiber::YieldTo(fiber1, *thread_fiber);
         }
         rewinded = true;
         fiber1->Rewind();