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https://github.com/oxen-io/oxen-core.git
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63b52422f6
The MacOSX 10.11 SDK we use is broken AF: it lies about supporting C++14, but really only upgraded the headers but not the library itself, so using std::shared_timed_mutex just results in a linking failure. Upgrading the SDK is a huge pain (I tried, failed, and gave up), so for now temporarily switch to boost::shared_mutex until we sort out the macOS build disaster.
72 lines
3 KiB
C++
72 lines
3 KiB
C++
// Copyright (c) 2019, The Loki Project
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//
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without modification, are
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// permitted provided that the following conditions are met:
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//
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// 1. Redistributions of source code must retain the above copyright notice, this list of
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// conditions and the following disclaimer.
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//
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// 2. Redistributions in binary form must reproduce the above copyright notice, this list
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// of conditions and the following disclaimer in the documentation and/or other
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// materials provided with the distribution.
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//
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// 3. Neither the name of the copyright holder nor the names of its contributors may be
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// used to endorse or promote products derived from this software without specific
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// prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
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// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
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// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
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// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#pragma once
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#include <mutex>
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#include <shared_mutex>
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#include <tuple>
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#include <boost/thread/lock_algorithms.hpp>
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namespace tools {
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/// Takes any number of lockable objects, locks them atomically, and returns a tuple of
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/// std::unique_lock holding the individual locks.
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template <typename... T>
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#ifdef __GNUG__
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[[gnu::warn_unused_result]]
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#endif
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std::tuple<std::unique_lock<T>...> unique_locks(T& ...lockables) {
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boost::lock(lockables...);
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auto locks = std::make_tuple(std::unique_lock<T>(lockables, std::adopt_lock)...);
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return locks;
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}
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/// Shortcut around getting a std::unique_lock<T> without worrying about T. The first argument is
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/// the mutex (or other Lockable object); it and any remaining args (such as `std::defer_lock`) are
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/// forwarded to the std::unique_lock<T> constructor.
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template <typename T, typename... Args>
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#ifdef __GNUG__
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[[gnu::warn_unused_result]]
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#endif
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std::unique_lock<T> unique_lock(T& lockable, Args&&... args) {
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return std::unique_lock<T>(lockable, std::forward<Args>(args)...);
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}
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/// Shortcut for getting a std::shared_lock<T> without worrying about T. First argument is the
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/// shared lockable; it any any remaining args (such as `std::defer_lock`) are forwarded to the
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/// std::shared_lock<T> constructor.
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template <typename T, typename... Args>
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#ifdef __GNUG__
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[[gnu::warn_unused_result]]
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#endif
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std::shared_lock<T> shared_lock(T& lockable, Args&&... args) {
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return std::shared_lock<T>(lockable, std::forward<Args>(args)...);
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}
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}
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