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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>
51 lines
1.8 KiB
C++
51 lines
1.8 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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// Macro to maintain thread-safety.
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// Platforms like UWP and iOS may call core methods
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// from another threads. Since core is not thread-safe,
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// we provide OPENVPN_ASYNC_HANDLER macro which instantiates
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// lock guard. It follows RIAA principle and locks global
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// mutex in constructor and unlocks in destructor. This
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// guarantees that code in block protected with this macro
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// won't be called simultaneously from different threads.
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#ifndef OPENVPN_COMMON_BIGMUTEX_H
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#define OPENVPN_COMMON_BIGMUTEX_H
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#include <mutex>
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namespace openvpn {
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namespace bigmutex {
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inline std::recursive_mutex the_recursive_mutex;
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}
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#ifdef OPENVPN_ENABLE_BIGMUTEX
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#define OPENVPN_ASYNC_HANDLER \
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std::lock_guard<std::recursive_mutex> lg(bigmutex::the_recursive_mutex);
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#else
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#define OPENVPN_ASYNC_HANDLER
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#endif
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} // namespace openvpn
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#endif
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