mirror of
https://github.com/OpenVPN/openvpn3.git
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0d0e3809c1
with the new C++17 capability of inline for variables, we can avoid having to ifdef tricks to only include the variables into one compilation unit. Also remove the extern.hpp that serves no purpose now anymore. Signed-off-by: Arne Schwabe <arne@openvpn.net>
98 lines
2.6 KiB
C++
98 lines
2.6 KiB
C++
// OpenVPN -- An application to securely tunnel IP networks
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// over a single port, with support for SSL/TLS-based
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// session authentication and key exchange,
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// packet encryption, packet authentication, and
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// packet compression.
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//
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// Copyright (C) 2012-2022 OpenVPN Inc.
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License Version 3
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// as published by the Free Software Foundation.
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//
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// This program 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
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// GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with this program in the COPYING file.
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// If not, see <http://www.gnu.org/licenses/>.
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// Process-wide static initialization
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#pragma once
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#include <thread>
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#include <mutex>
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#include <openvpn/common/size.hpp>
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#include <openvpn/common/base64.hpp>
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#include <openvpn/time/time.hpp>
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#include <openvpn/compress/compress.hpp>
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#include <openvpn/init/cryptoinit.hpp>
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#include <openvpn/init/engineinit.hpp>
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namespace openvpn {
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namespace InitProcess {
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class Init
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{
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private:
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class InitImpl
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{
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public:
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InitImpl()
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{
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// initialize time base
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Time::reset_base();
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// initialize compression
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CompressContext::init_static();
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// init OpenSSL if included
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init_openssl("auto");
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base64_init_static();
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}
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~InitImpl()
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{
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base64_uninit_static();
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}
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private:
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// SSL library init happens when instantiated
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crypto_init crypto_init_;
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};
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// process-wide singular instance
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inline static std::weak_ptr<InitImpl> init_instance; // GLOBAL
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inline static std::mutex the_instance_mutex; // GLOBAL
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// istance of this class to refcount
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std::shared_ptr<InitImpl> initptr;
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public:
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Init()
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{
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std::lock_guard<std::mutex> lock(the_instance_mutex);
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initptr = init_instance.lock();
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if (!initptr)
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{
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initptr = std::make_shared<InitImpl>();
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init_instance = initptr;
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}
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}
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~Init()
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{
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// explicitly reset smart pointer to make the destructor run under the lock_guard
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std::lock_guard<std::mutex> lock(the_instance_mutex);
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initptr.reset();
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}
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};
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} // namespace InitProcess
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} // namespace openvpn
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