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@ -26,34 +26,68 @@ |
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#include <grpc/event_engine/memory_allocator.h> |
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#include <grpc/event_engine/slice_buffer.h> |
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#include "src/core/lib/event_engine/channel_args_endpoint_config.h" |
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#include "src/core/lib/event_engine/common_closures.h" |
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#include "src/core/lib/event_engine/executor/executor.h" |
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#include "src/core/lib/event_engine/handle_containers.h" |
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#include "src/core/lib/event_engine/posix_engine/timer_manager.h" |
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#include "src/core/lib/event_engine/tcp_socket_utils.h" |
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#include "src/core/lib/event_engine/trace.h" |
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#include "src/core/lib/event_engine/utils.h" |
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#include "src/core/lib/event_engine/windows/iocp.h" |
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#include "src/core/lib/event_engine/windows/windows_endpoint.h" |
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#include "src/core/lib/event_engine/windows/windows_engine.h" |
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#include "src/core/lib/gprpp/crash.h" |
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#include "src/core/lib/gprpp/sync.h" |
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#include "src/core/lib/gprpp/time.h" |
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#include "src/core/lib/iomgr/error.h" |
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namespace grpc_event_engine { |
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namespace experimental { |
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// ---- IOCPWorkClosure ----
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WindowsEventEngine::IOCPWorkClosure::IOCPWorkClosure(Executor* executor, |
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IOCP* iocp) |
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: executor_(executor), iocp_(iocp) { |
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executor_->Run(this); |
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} |
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void WindowsEventEngine::IOCPWorkClosure::Run() { |
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auto result = iocp_->Work(std::chrono::seconds(60), [this] { |
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workers_.fetch_add(1); |
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executor_->Run(this); |
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}); |
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if (result == Poller::WorkResult::kDeadlineExceeded) { |
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// iocp received no messages. restart the worker
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workers_.fetch_add(1); |
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executor_->Run(this); |
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} |
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if (workers_.fetch_sub(1) == 1) done_signal_.Notify(); |
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} |
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void WindowsEventEngine::IOCPWorkClosure::WaitForShutdown() { |
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done_signal_.WaitForNotification(); |
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} |
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// ---- WindowsEventEngine ----
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// TODO(hork): The iomgr timer and execution engine can be reused. It should
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// be separated out from the posix_engine and instantiated as components. It is
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// effectively copied below.
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struct WindowsEventEngine::Closure final : public EventEngine::Closure { |
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struct WindowsEventEngine::TimerClosure final : public EventEngine::Closure { |
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absl::AnyInvocable<void()> cb; |
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Timer timer; |
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WindowsEventEngine* engine; |
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EventEngine::TaskHandle handle; |
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void Run() override { |
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GRPC_EVENT_ENGINE_TRACE("WindowsEventEngine:%p executing callback:%s", |
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engine, HandleToString(handle).c_str()); |
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GRPC_EVENT_ENGINE_TRACE( |
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"WindowsEventEngine:%p executing callback:%s", engine, |
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HandleToString<EventEngine::TaskHandle>(handle).c_str()); |
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{ |
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grpc_core::MutexLock lock(&engine->mu_); |
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grpc_core::MutexLock lock(&engine->task_mu_); |
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engine->known_handles_.erase(handle); |
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} |
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cb(); |
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@ -64,7 +98,8 @@ struct WindowsEventEngine::Closure final : public EventEngine::Closure { |
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WindowsEventEngine::WindowsEventEngine() |
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: executor_(std::make_shared<ThreadPool>()), |
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iocp_(executor_.get()), |
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timer_manager_(executor_) { |
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timer_manager_(executor_), |
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iocp_worker_(executor_.get(), &iocp_) { |
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WSADATA wsaData; |
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int status = WSAStartup(MAKEWORD(2, 0), &wsaData); |
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GPR_ASSERT(status == 0); |
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@ -72,25 +107,28 @@ WindowsEventEngine::WindowsEventEngine() |
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WindowsEventEngine::~WindowsEventEngine() { |
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{ |
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grpc_core::MutexLock lock(&mu_); |
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grpc_core::MutexLock lock(&task_mu_); |
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if (GRPC_TRACE_FLAG_ENABLED(grpc_event_engine_trace)) { |
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for (auto handle : known_handles_) { |
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gpr_log(GPR_ERROR, |
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"WindowsEventEngine:%p uncleared TaskHandle at shutdown:%s", |
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this, HandleToString(handle).c_str()); |
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this, HandleToString<EventEngine::TaskHandle>(handle).c_str()); |
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} |
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} |
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GPR_ASSERT(GPR_LIKELY(known_handles_.empty())); |
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} |
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iocp_.Kick(); |
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iocp_worker_.WaitForShutdown(); |
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iocp_.Shutdown(); |
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GPR_ASSERT(WSACleanup() == 0); |
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timer_manager_.Shutdown(); |
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} |
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executor_->Quiesce(); |
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} |
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bool WindowsEventEngine::Cancel(EventEngine::TaskHandle handle) { |
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grpc_core::MutexLock lock(&mu_); |
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grpc_core::MutexLock lock(&task_mu_); |
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if (!known_handles_.contains(handle)) return false; |
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auto* cd = reinterpret_cast<Closure*>(handle.keys[0]); |
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auto* cd = reinterpret_cast<TimerClosure*>(handle.keys[0]); |
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bool r = timer_manager_.TimerCancel(&cd->timer); |
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known_handles_.erase(handle); |
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if (r) delete cd; |
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@ -118,16 +156,17 @@ void WindowsEventEngine::Run(EventEngine::Closure* closure) { |
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EventEngine::TaskHandle WindowsEventEngine::RunAfterInternal( |
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Duration when, absl::AnyInvocable<void()> cb) { |
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auto when_ts = ToTimestamp(timer_manager_.Now(), when); |
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auto* cd = new Closure; |
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auto* cd = new TimerClosure; |
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cd->cb = std::move(cb); |
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cd->engine = this; |
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EventEngine::TaskHandle handle{reinterpret_cast<intptr_t>(cd), |
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aba_token_.fetch_add(1)}; |
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grpc_core::MutexLock lock(&mu_); |
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grpc_core::MutexLock lock(&task_mu_); |
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known_handles_.insert(handle); |
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cd->handle = handle; |
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GRPC_EVENT_ENGINE_TRACE("WindowsEventEngine:%p scheduling callback:%s", this, |
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HandleToString(handle).c_str()); |
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GRPC_EVENT_ENGINE_TRACE( |
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"WindowsEventEngine:%p scheduling callback:%s", this, |
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HandleToString<EventEngine::TaskHandle>(handle).c_str()); |
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timer_manager_.TimerInit(&cd->timer, when_ts, cd); |
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return handle; |
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} |
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@ -139,15 +178,194 @@ std::unique_ptr<EventEngine::DNSResolver> WindowsEventEngine::GetDNSResolver( |
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bool WindowsEventEngine::IsWorkerThread() { grpc_core::Crash("unimplemented"); } |
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bool WindowsEventEngine::CancelConnect(EventEngine::ConnectionHandle handle) { |
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grpc_core::Crash("unimplemented"); |
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void WindowsEventEngine::OnConnectCompleted( |
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std::shared_ptr<ConnectionState> state) { |
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// Connection attempt complete!
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grpc_core::MutexLock lock(&state->mu); |
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state->on_connected = nullptr; |
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{ |
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grpc_core::MutexLock handle_lock(&connection_mu_); |
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known_connection_handles_.erase(state->connection_handle); |
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} |
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// return early if we cannot cancel the connection timeout timer.
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if (!Cancel(state->timer_handle)) return; |
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auto write_info = state->socket->write_info(); |
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if (write_info->wsa_error() != 0) { |
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auto error = GRPC_WSA_ERROR(write_info->wsa_error(), "ConnectEx"); |
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state->socket->MaybeShutdown(error); |
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state->on_connected_user_callback(error); |
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return; |
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} |
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// This code should be running in an executor thread already, so the callback
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// can be run directly.
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ChannelArgsEndpointConfig cfg; |
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state->on_connected_user_callback(std::make_unique<WindowsEndpoint>( |
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state->address, std::move(state->socket), std::move(state->allocator), |
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cfg, executor_.get())); |
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} |
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EventEngine::ConnectionHandle WindowsEventEngine::Connect( |
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OnConnectCallback on_connect, const ResolvedAddress& addr, |
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const EndpointConfig& args, MemoryAllocator memory_allocator, |
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Duration deadline) { |
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grpc_core::Crash("unimplemented"); |
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const EndpointConfig& /* args */, MemoryAllocator memory_allocator, |
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Duration timeout) { |
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// TODO(hork): utilize the endpoint config
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absl::Status status; |
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int istatus; |
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auto uri = ResolvedAddressToURI(addr); |
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if (!uri.ok()) { |
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Run([on_connect = std::move(on_connect), status = uri.status()]() mutable { |
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on_connect(status); |
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}); |
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return invalid_connection_handle; |
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} |
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GRPC_EVENT_ENGINE_TRACE("EventEngine::%p connecting to %s", this, |
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uri->c_str()); |
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// Use dualstack sockets where available.
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ResolvedAddress address = addr; |
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ResolvedAddress addr6_v4mapped; |
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if (ResolvedAddressToV4Mapped(addr, &addr6_v4mapped)) { |
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address = addr6_v4mapped; |
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} |
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SOCKET sock = WSASocket(AF_INET6, SOCK_STREAM, IPPROTO_TCP, nullptr, 0, |
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IOCP::GetDefaultSocketFlags()); |
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if (sock == INVALID_SOCKET) { |
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Run([on_connect = std::move(on_connect), |
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status = GRPC_WSA_ERROR(WSAGetLastError(), "WSASocket")]() mutable { |
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on_connect(status); |
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}); |
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return invalid_connection_handle; |
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} |
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status = PrepareSocket(sock); |
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if (!status.ok()) { |
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Run([on_connect = std::move(on_connect), status]() mutable { |
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on_connect(status); |
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}); |
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return invalid_connection_handle; |
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} |
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// Grab the function pointer for ConnectEx for that specific socket It may
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// change depending on the interface.
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LPFN_CONNECTEX ConnectEx; |
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GUID guid = WSAID_CONNECTEX; |
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DWORD ioctl_num_bytes; |
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istatus = WSAIoctl(sock, SIO_GET_EXTENSION_FUNCTION_POINTER, &guid, |
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sizeof(guid), &ConnectEx, sizeof(ConnectEx), |
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&ioctl_num_bytes, nullptr, nullptr); |
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if (istatus != 0) { |
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Run([on_connect = std::move(on_connect), |
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status = GRPC_WSA_ERROR( |
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WSAGetLastError(), |
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"WSAIoctl(SIO_GET_EXTENSION_FUNCTION_POINTER)")]() mutable { |
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on_connect(status); |
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}); |
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return invalid_connection_handle; |
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} |
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// bind the local address
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auto local_address = ResolvedAddressMakeWild6(0); |
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istatus = bind(sock, local_address.address(), local_address.size()); |
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if (istatus != 0) { |
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Run([on_connect = std::move(on_connect), |
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status = GRPC_WSA_ERROR(WSAGetLastError(), "bind")]() mutable { |
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on_connect(status); |
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}); |
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return invalid_connection_handle; |
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} |
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// Connect
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auto watched_socket = iocp_.Watch(sock); |
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auto* info = watched_socket->write_info(); |
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bool success = |
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ConnectEx(watched_socket->socket(), address.address(), address.size(), |
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nullptr, 0, nullptr, info->overlapped()); |
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// It wouldn't be unusual to get a success immediately. But we'll still get an
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// IOCP notification, so let's ignore it.
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if (!success) { |
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int last_error = WSAGetLastError(); |
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if (last_error != ERROR_IO_PENDING) { |
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auto status = GRPC_WSA_ERROR(WSAGetLastError(), "ConnectEx"); |
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Run([on_connect = std::move(on_connect), status]() mutable { |
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on_connect(status); |
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}); |
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watched_socket->MaybeShutdown(status); |
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return invalid_connection_handle; |
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} |
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} |
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GPR_ASSERT(watched_socket != nullptr); |
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auto connection_state = std::make_shared<ConnectionState>(); |
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grpc_core::MutexLock lock(&connection_state->mu); |
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connection_state->address = address; |
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connection_state->socket = std::move(watched_socket); |
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connection_state->on_connected_user_callback = std::move(on_connect); |
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connection_state->allocator = std::move(memory_allocator); |
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connection_state->on_connected = |
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SelfDeletingClosure::Create([this, connection_state]() mutable { |
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OnConnectCompleted(std::move(connection_state)); |
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}); |
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{ |
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grpc_core::MutexLock conn_lock(&connection_mu_); |
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connection_state->connection_handle = |
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ConnectionHandle{reinterpret_cast<intptr_t>(connection_state.get()), |
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aba_token_.fetch_add(1)}; |
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known_connection_handles_.insert(connection_state->connection_handle); |
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} |
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connection_state->timer_handle = |
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RunAfter(timeout, [this, connection_state]() { |
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grpc_core::MutexLock lock(&connection_state->mu); |
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if (CancelConnectFromDeadlineTimer(connection_state.get())) { |
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connection_state->on_connected_user_callback( |
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absl::DeadlineExceededError("Connection timed out")); |
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} |
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// else: The connection attempt could not be canceled. We can assume the
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// connection callback will be called.
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}); |
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connection_state->socket->NotifyOnWrite(connection_state->on_connected); |
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return connection_state->connection_handle; |
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} |
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bool WindowsEventEngine::CancelConnect(EventEngine::ConnectionHandle handle) { |
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if (TaskHandleComparator<ConnectionHandle>::Eq()(handle, |
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invalid_connection_handle)) { |
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GRPC_EVENT_ENGINE_TRACE("%s", |
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"Attempted to cancel an invalid connection handle"); |
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return false; |
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} |
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// Erase the connection handle, which may be unknown
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{ |
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grpc_core::MutexLock lock(&connection_mu_); |
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if (!known_connection_handles_.contains(handle)) { |
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GRPC_EVENT_ENGINE_TRACE( |
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"Unknown connection handle: %s", |
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HandleToString<EventEngine::ConnectionHandle>(handle).c_str()); |
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return false; |
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} |
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known_connection_handles_.erase(handle); |
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} |
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auto* connection_state = reinterpret_cast<ConnectionState*>(handle.keys[0]); |
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grpc_core::MutexLock state_lock(&connection_state->mu); |
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if (!Cancel(connection_state->timer_handle)) return false; |
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return CancelConnectInternalStateLocked(connection_state); |
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} |
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bool WindowsEventEngine::CancelConnectFromDeadlineTimer( |
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ConnectionState* connection_state) { |
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// Erase the connection handle, which is guaranteed to exist.
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{ |
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grpc_core::MutexLock lock(&connection_mu_); |
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GPR_ASSERT(known_connection_handles_.erase( |
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connection_state->connection_handle) == 1); |
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} |
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return CancelConnectInternalStateLocked(connection_state); |
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} |
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bool WindowsEventEngine::CancelConnectInternalStateLocked( |
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ConnectionState* connection_state) { |
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connection_state->socket->MaybeShutdown( |
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absl::CancelledError("CancelConnect")); |
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// Release the connection_state shared_ptr. connection_state is now invalid.
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delete connection_state->on_connected; |
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GRPC_EVENT_ENGINE_TRACE("Successfully cancelled connection %s", |
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HandleToString<EventEngine::ConnectionHandle>( |
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connection_state->connection_handle) |
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.c_str()); |
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return true; |
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} |
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absl::StatusOr<std::unique_ptr<EventEngine::Listener>> |
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AJ Heller
2 years ago
committed by
GitHub