115 lines
3.0 KiB
C++
115 lines
3.0 KiB
C++
//
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// Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2018
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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/WineventPoll.h"
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char disable_linker_warning_about_empty_file_wineventpoll_cpp TD_UNUSED;
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#ifdef TD_POLL_WINEVENT
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#include "td/utils/common.h"
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#include "td/utils/logging.h"
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#include "td/utils/port/PollBase.h"
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#include "td/utils/Status.h"
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#include <utility>
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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 = GetQueuedCompletionStatus(iocp_handle_.io_handle(), &bytes, &key,
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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("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_ = NativeFd(res);
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}
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void IOCP::clear() {
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iocp_handle_.close();
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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.io_handle(), iocp_handle_.io_handle(), reinterpret_cast<ULONG_PTR>(callback), 0);
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if (iocp_handle == INVALID_HANDLE_VALUE) {
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auto error = OS_ERROR("CreateIoCompletionPort");
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LOG(FATAL) << error;
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}
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CHECK(iocp_handle == iocp_handle_.io_handle()) << iocp_handle << " " << iocp_handle_.io_handle();
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}
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void IOCP::post(size_t size, Callback *callback, WSAOVERLAPPED *overlapped) {
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PostQueuedCompletionStatus(iocp_handle_.io_handle(), DWORD(size), reinterpret_cast<ULONG_PTR>(callback),
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reinterpret_cast<OVERLAPPED *>(overlapped));
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}
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void WineventPoll::init() {
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}
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void WineventPoll::clear() {
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}
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void WineventPoll::subscribe(PollableFd fd, PollFlags flags) {
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fd.release_as_list_node();
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}
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void WineventPoll::unsubscribe(PollableFdRef fd) {
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fd.lock();
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}
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void WineventPoll::unsubscribe_before_close(PollableFdRef fd) {
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unsubscribe(std::move(fd));
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}
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void WineventPoll::run(int timeout_ms) {
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UNREACHABLE();
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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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