verdnatura-chat/ios/Pods/Folly/folly/LockTraitsBoost.h

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3.1 KiB
C++

/*
* Copyright 2016-present Facebook, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* This file contains LockTraits specializations for boost mutex types.
*
* These need to be specialized simply due to the fact that the timed
* methods take boost::chrono arguments instead of std::chrono.
*/
#pragma once
#include <boost/thread.hpp>
#include <folly/LockTraits.h>
#if FOLLY_LOCK_TRAITS_HAVE_TIMED_MUTEXES
namespace folly {
namespace detail {
/// Convert a std::chrono::duration argument to boost::chrono::duration
template <class Rep, std::intmax_t Num, std::intmax_t Denom>
boost::chrono::duration<Rep, boost::ratio<Num, Denom>> toBoostDuration(
const std::chrono::duration<Rep, std::ratio<Num, Denom>>& d) {
return boost::chrono::duration<Rep, boost::ratio<Num, Denom>>(d.count());
}
} // namespace detail
/**
* LockTraits specialization for boost::shared_mutex
*/
template <>
struct LockTraits<boost::shared_mutex>
: public LockTraitsBase<boost::shared_mutex> {
static constexpr bool is_shared = true;
static constexpr bool is_timed = true;
template <class Rep, class Period>
static bool try_lock_for(
boost::shared_mutex& mutex,
const std::chrono::duration<Rep, Period>& timeout) {
return mutex.try_lock_for(detail::toBoostDuration(timeout));
}
template <class Rep, class Period>
static bool try_lock_shared_for(
boost::shared_mutex& mutex,
const std::chrono::duration<Rep, Period>& timeout) {
return mutex.try_lock_shared_for(detail::toBoostDuration(timeout));
}
};
/**
* LockTraits specialization for boost::timed_mutex
*/
template <>
struct LockTraits<boost::timed_mutex>
: public LockTraitsBase<boost::timed_mutex> {
static constexpr bool is_shared = false;
static constexpr bool is_timed = true;
template <class Rep, class Period>
static bool try_lock_for(
boost::timed_mutex& mutex,
const std::chrono::duration<Rep, Period>& timeout) {
return mutex.try_lock_for(detail::toBoostDuration(timeout));
}
};
/**
* LockTraits specialization for boost::recursive_timed_mutex
*/
template <>
struct LockTraits<boost::recursive_timed_mutex>
: public LockTraitsBase<boost::recursive_timed_mutex> {
static constexpr bool is_shared = false;
static constexpr bool is_timed = true;
template <class Rep, class Period>
static bool try_lock_for(
boost::recursive_timed_mutex& mutex,
const std::chrono::duration<Rep, Period>& timeout) {
return mutex.try_lock_for(detail::toBoostDuration(timeout));
}
};
} // namespace folly
#endif // FOLLY_LOCK_TRAITS_HAVE_TIMED_MUTEXES