111 lines
3.1 KiB
C++
111 lines
3.1 KiB
C++
//
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// Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2020
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//
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// Distributed under the Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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//
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#include "td/utils/port/detail/Iocp.h"
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char disable_linker_warning_about_empty_file_iocp_cpp TD_UNUSED;
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#ifdef TD_PORT_WINDOWS
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#include "td/utils/logging.h"
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namespace td {
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namespace detail {
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Iocp::~Iocp() {
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clear();
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}
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void Iocp::loop() {
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Iocp::Guard guard(this);
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while (true) {
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DWORD bytes = 0;
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ULONG_PTR key = 0;
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WSAOVERLAPPED *overlapped = nullptr;
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BOOL ok =
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GetQueuedCompletionStatus(iocp_handle_->fd(), &bytes, &key, reinterpret_cast<OVERLAPPED **>(&overlapped), 1000);
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if (bytes || key || overlapped) {
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// LOG(ERROR) << "Got IOCP " << bytes << " " << key << " " << overlapped;
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}
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if (ok) {
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auto callback = reinterpret_cast<Iocp::Callback *>(key);
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if (callback == nullptr) {
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// LOG(ERROR) << "Interrupt IOCP loop";
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return;
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}
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callback->on_iocp(bytes, overlapped);
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} else {
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if (overlapped != nullptr) {
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auto error = OS_ERROR("Received from IOCP");
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auto callback = reinterpret_cast<Iocp::Callback *>(key);
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CHECK(callback != nullptr);
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callback->on_iocp(std::move(error), overlapped);
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}
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}
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}
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}
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void Iocp::interrupt_loop() {
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post(0, nullptr, nullptr);
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}
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void Iocp::init() {
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CHECK(!iocp_handle_);
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auto res = CreateIoCompletionPort(INVALID_HANDLE_VALUE, nullptr, 0, 0);
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if (res == nullptr) {
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auto error = OS_ERROR("IOCP creation failed");
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LOG(FATAL) << error;
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}
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iocp_handle_ = std::make_shared<NativeFd>(res);
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}
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void Iocp::clear() {
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iocp_handle_.reset();
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}
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void Iocp::subscribe(const NativeFd &native_fd, Callback *callback) {
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CHECK(iocp_handle_);
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auto iocp_handle =
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CreateIoCompletionPort(native_fd.fd(), iocp_handle_->fd(), reinterpret_cast<ULONG_PTR>(callback), 0);
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if (iocp_handle == nullptr) {
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auto error = OS_ERROR("CreateIoCompletionPort");
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LOG(FATAL) << error;
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}
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LOG_CHECK(iocp_handle == iocp_handle_->fd()) << iocp_handle << " " << iocp_handle_->fd();
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}
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IocpRef Iocp::get_ref() const {
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return IocpRef(iocp_handle_);
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}
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static void iocp_post(NativeFd &iocp_handle, size_t size, Iocp::Callback *callback, WSAOVERLAPPED *overlapped) {
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if (PostQueuedCompletionStatus(iocp_handle.fd(), DWORD(size), reinterpret_cast<ULONG_PTR>(callback),
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reinterpret_cast<OVERLAPPED *>(overlapped)) == 0) {
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auto error = OS_ERROR("IOCP post failed");
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LOG(FATAL) << error;
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}
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}
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void Iocp::post(size_t size, Callback *callback, WSAOVERLAPPED *overlapped) {
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iocp_post(*iocp_handle_, size, callback, overlapped);
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}
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IocpRef::IocpRef(std::weak_ptr<NativeFd> iocp_handle) : iocp_handle_(std::move(iocp_handle)) {
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}
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bool IocpRef::post(size_t size, Iocp::Callback *callback, WSAOVERLAPPED *overlapped) {
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auto iocp_handle = iocp_handle_.lock();
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if (!iocp_handle) {
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return false;
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}
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iocp_post(*iocp_handle, size, callback, overlapped);
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return true;
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}
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} // namespace detail
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} // namespace td
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#endif
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