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common: fiber: Use boost::context instead of native fibers on Windows.

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This commit is contained in:
bunnei 2020-11-13 15:17:47 -08:00
parent 7b642c7781
commit c042a89113
3 changed files with 9 additions and 116 deletions
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114
src/common/fiber.cpp
View file

@ -6,17 +6,16 @@
#include "common/fiber.h"
#include "common/spin_lock.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 = 256 * 1024; // 256kb
constexpr std::size_t default_stack_size = 256 * 1024;
struct Fiber::FiberImpl {
alignas(64) std::array<u8, default_stack_size> stack;
alignas(64) std::array<u8, default_stack_size> rewind_stack;
SpinLock guard{};
std::function<void(void*)> entry_point;
std::function<void(void*)> rewind_point;
@ -26,17 +25,10 @@ struct Fiber::FiberImpl {
bool is_thread_fiber{};
bool released{};
#if defined(_WIN32) || defined(WIN32)
LPVOID handle = nullptr;
LPVOID rewind_handle = nullptr;
#else
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
u8* stack_limit{};
u8* rewind_stack_limit{};
boost::context::detail::fcontext_t context{};
boost::context::detail::fcontext_t rewind_context{};
};
void Fiber::SetStartParameter(void* new_parameter) {
@ -48,95 +40,6 @@ void Fiber::SetRewindPoint(std::function<void(void*)>&& rewind_func, void* rewin
impl->rewind_parameter = rewind_param;
}
#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(impl->start_parameter);
UNREACHABLE();
}
void Fiber::OnRewind() {
ASSERT(impl->handle != nullptr);
DeleteFiber(impl->handle);
impl->handle = impl->rewind_handle;
impl->rewind_handle = nullptr;
impl->rewind_point(impl->rewind_parameter);
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(void*)>&& entry_point_func, void* start_parameter)
: impl{std::make_unique<FiberImpl>()} {
impl->entry_point = std::move(entry_point_func);
impl->start_parameter = start_parameter;
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;
@ -229,5 +132,4 @@ std::shared_ptr<Fiber> Fiber::ThreadToFiber() {
return fiber;
}
#endif
} // namespace Common

9
src/common/fiber.h
View file

@ -7,11 +7,9 @@
#include <functional>
#include <memory>
#if !defined(_WIN32) && !defined(WIN32)
namespace boost::context::detail {
struct transfer_t;
}
#endif
namespace Common {
@ -59,17 +57,10 @@ public:
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;

2
src/core/hle/kernel/kernel.cpp
View file

@ -502,7 +502,7 @@ void KernelCore::InvalidateAllInstructionCaches() {
physical_core.ArmInterface().ClearInstructionCache();
}
} else {
ASSERT_MSG(false, "UNIMPLEMENTED!!!!!!!!!!!");
UNIMPLEMENTED();
}
}