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author | bunnei <bunneidev@gmail.com> | 2020-09-06 04:40:59 +0200 |
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committer | GitHub <noreply@github.com> | 2020-09-06 04:40:59 +0200 |
commit | e126021ffe6f47e8f4603643b07726e4896ed007 (patch) | |
tree | 4b4738bfe3ee520f8c72afb57fad79fc90832936 /src/core/hle/service/sockets/blocking_worker.h | |
parent | Merge pull request #4629 from Morph1984/mergesinglejoyasdualjoy-impl (diff) | |
parent | service/bsd: Handle Poll with no entries accurately (diff) | |
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Diffstat (limited to 'src/core/hle/service/sockets/blocking_worker.h')
-rw-r--r-- | src/core/hle/service/sockets/blocking_worker.h | 162 |
1 files changed, 162 insertions, 0 deletions
diff --git a/src/core/hle/service/sockets/blocking_worker.h b/src/core/hle/service/sockets/blocking_worker.h new file mode 100644 index 000000000..31ef6b821 --- /dev/null +++ b/src/core/hle/service/sockets/blocking_worker.h @@ -0,0 +1,162 @@ +// Copyright 2020 yuzu emulator team +// Licensed under GPLv2 or any later version +// Refer to the license.txt file included. + +#pragma once + +#include <atomic> +#include <memory> +#include <string> +#include <string_view> +#include <thread> +#include <variant> +#include <vector> + +#include <fmt/format.h> + +#include "common/assert.h" +#include "common/microprofile.h" +#include "common/thread.h" +#include "core/core.h" +#include "core/hle/kernel/hle_ipc.h" +#include "core/hle/kernel/kernel.h" +#include "core/hle/kernel/thread.h" +#include "core/hle/kernel/writable_event.h" + +namespace Service::Sockets { + +/** + * Worker abstraction to execute blocking calls on host without blocking the guest thread + * + * @tparam Service Service where the work is executed + * @tparam ...Types Types of work to execute + */ +template <class Service, class... Types> +class BlockingWorker { + using This = BlockingWorker<Service, Types...>; + using WorkVariant = std::variant<std::monostate, Types...>; + +public: + /// Create a new worker + static std::unique_ptr<This> Create(Core::System& system, Service* service, + std::string_view name) { + return std::unique_ptr<This>(new This(system, service, name)); + } + + ~BlockingWorker() { + while (!is_available.load(std::memory_order_relaxed)) { + // Busy wait until work is finished + std::this_thread::yield(); + } + // Monostate means to exit the thread + work = std::monostate{}; + work_event.Set(); + thread.join(); + } + + /** + * Try to capture the worker to send work after a success + * @returns True when the worker has been successfully captured + */ + bool TryCapture() { + bool expected = true; + return is_available.compare_exchange_weak(expected, false, std::memory_order_relaxed, + std::memory_order_relaxed); + } + + /** + * Send work to this worker abstraction + * @see TryCapture must be called before attempting to call this function + */ + template <class Work> + void SendWork(Work new_work) { + ASSERT_MSG(!is_available, "Trying to send work on a worker that's not captured"); + work = std::move(new_work); + work_event.Set(); + } + + /// Generate a callback for @see SleepClientThread + template <class Work> + auto Callback() { + return [this](std::shared_ptr<Kernel::Thread>, Kernel::HLERequestContext& ctx, + Kernel::ThreadWakeupReason reason) { + ASSERT(reason == Kernel::ThreadWakeupReason::Signal); + std::get<Work>(work).Response(ctx); + is_available.store(true); + }; + } + + /// Get kernel event that will be signalled by the worker when the host operation finishes + std::shared_ptr<Kernel::WritableEvent> KernelEvent() const { + return kernel_event; + } + +private: + explicit BlockingWorker(Core::System& system, Service* service, std::string_view name) { + auto pair = Kernel::WritableEvent::CreateEventPair(system.Kernel(), std::string(name)); + kernel_event = std::move(pair.writable); + thread = std::thread([this, &system, service, name] { Run(system, service, name); }); + } + + void Run(Core::System& system, Service* service, std::string_view name) { + system.RegisterHostThread(); + + const std::string thread_name = fmt::format("yuzu:{}", name); + MicroProfileOnThreadCreate(thread_name.c_str()); + Common::SetCurrentThreadName(thread_name.c_str()); + + bool keep_running = true; + while (keep_running) { + work_event.Wait(); + + const auto visit_fn = [service, &keep_running](auto&& w) { + using T = std::decay_t<decltype(w)>; + if constexpr (std::is_same_v<T, std::monostate>) { + keep_running = false; + } else { + w.Execute(service); + } + }; + std::visit(visit_fn, work); + + kernel_event->Signal(); + } + } + + std::thread thread; + WorkVariant work; + Common::Event work_event; + std::shared_ptr<Kernel::WritableEvent> kernel_event; + std::atomic_bool is_available{true}; +}; + +template <class Service, class... Types> +class BlockingWorkerPool { + using Worker = BlockingWorker<Service, Types...>; + +public: + explicit BlockingWorkerPool(Core::System& system_, Service* service_) + : system{system_}, service{service_} {} + + /// Returns a captured worker thread, creating new ones if necessary + Worker* CaptureWorker() { + for (auto& worker : workers) { + if (worker->TryCapture()) { + return worker.get(); + } + } + auto new_worker = Worker::Create(system, service, fmt::format("BSD:{}", workers.size())); + [[maybe_unused]] const bool success = new_worker->TryCapture(); + ASSERT(success); + + return workers.emplace_back(std::move(new_worker)).get(); + } + +private: + Core::System& system; + Service* const service; + + std::vector<std::unique_ptr<Worker>> workers; +}; + +} // namespace Service::Sockets |