mirror of
https://github.com/mii443/libdatachannel.git
synced 2025-08-23 15:48:03 +00:00
151 lines
3.2 KiB
C++
151 lines
3.2 KiB
C++
/**
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* Copyright (c) 2020 Paul-Louis Ageneau
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "init.hpp"
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#include "internals.hpp"
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#include "impl/certificate.hpp"
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#include "impl/dtlstransport.hpp"
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#include "impl/sctptransport.hpp"
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#include "impl/threadpool.hpp"
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#include "impl/tls.hpp"
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#if RTC_ENABLE_WEBSOCKET
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#include "impl/tlstransport.hpp"
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#endif
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#if RTC_ENABLE_MEDIA
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#include "impl/dtlssrtptransport.hpp"
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#endif
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#ifdef _WIN32
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#include <winsock2.h>
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#endif
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namespace rtc {
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namespace {
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void doInit() {
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#ifdef _WIN32
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WSADATA wsaData;
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if (WSAStartup(MAKEWORD(2, 2), &wsaData))
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throw std::runtime_error("WSAStartup failed, error=" + std::to_string(WSAGetLastError()));
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#endif
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impl::ThreadPool::Instance().spawn(THREADPOOL_SIZE);
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#if USE_GNUTLS
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// Nothing to do
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#else
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openssl::init();
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#endif
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impl::SctpTransport::Init();
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impl::DtlsTransport::Init();
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#if RTC_ENABLE_WEBSOCKET
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impl::TlsTransport::Init();
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#endif
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#if RTC_ENABLE_MEDIA
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impl::DtlsSrtpTransport::Init();
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#endif
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}
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void doCleanup() {
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impl::ThreadPool::Instance().join();
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impl::SctpTransport::Cleanup();
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impl::DtlsTransport::Cleanup();
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#if RTC_ENABLE_WEBSOCKET
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impl::TlsTransport::Cleanup();
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#endif
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#if RTC_ENABLE_MEDIA
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impl::DtlsSrtpTransport::Cleanup();
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#endif
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#ifdef _WIN32
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WSACleanup();
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#endif
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}
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} // namespace
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weak_ptr<void> Init::Weak;
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shared_ptr<void> *Init::Global = nullptr;
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bool Init::Initialized = false;
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SctpSettings Init::CurrentSctpSettings = {};
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std::recursive_mutex Init::Mutex;
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init_token Init::Token() {
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std::unique_lock lock(Mutex);
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if (auto token = Weak.lock())
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return token;
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delete Global;
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Global = new shared_ptr<void>(new Init());
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Weak = *Global;
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return *Global;
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}
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void Init::Preload() {
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std::unique_lock lock(Mutex);
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auto token = Token();
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if (!Global)
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Global = new shared_ptr<void>(token);
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}
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void Init::Cleanup() {
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std::unique_lock lock(Mutex);
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delete Global;
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Global = nullptr;
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}
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void Init::SetSctpSettings(SctpSettings s) {
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auto token = Token();
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std::unique_lock lock(Mutex);
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impl::SctpTransport::SetSettings(s);
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CurrentSctpSettings = std::move(s); // store for next init
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}
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Init::Init() {
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// Mutex is locked by Token() here
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if (!std::exchange(Initialized, true)) {
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PLOG_DEBUG << "Global initialization";
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doInit();
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impl::SctpTransport::SetSettings(CurrentSctpSettings);
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}
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}
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Init::~Init() {
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std::thread t([]() {
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// We need to lock Mutex ourselves
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std::unique_lock lock(Mutex);
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if (Global)
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return;
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if (std::exchange(Initialized, false)) {
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PLOG_DEBUG << "Global cleanup";
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doCleanup();
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}
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});
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t.detach();
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}
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} // namespace rtc
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