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/*
* Copyright (c) 2017-2019 Cisco and/or its affiliates.
* 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.
*/
#pragma once
#include <utils/event_reactor.h>
#include <chrono>
#include <cstddef>
#include <cstring>
#include <utility>
namespace std {
namespace chrono {
namespace detail {
template <typename From, typename To>
struct posix_duration_cast;
// chrono -> timespec caster
template <typename Rep, typename Period>
struct posix_duration_cast<std::chrono::duration<Rep, Period>,
struct timespec> {
static struct timespec cast(std::chrono::duration<Rep, Period> const &d) {
struct timespec tv;
std::chrono::seconds const sec =
std::chrono::duration_cast<std::chrono::seconds>(d);
tv.tv_sec = sec.count();
tv.tv_nsec =
std::chrono::duration_cast<std::chrono::nanoseconds>(d - sec).count();
return tv;
}
};
// timespec -> chrono caster
template <typename Rep, typename Period>
struct posix_duration_cast<struct timespec,
std::chrono::duration<Rep, Period>> {
static std::chrono::duration<Rep, Period> cast(struct timespec const &tv) {
return std::chrono::duration_cast<std::chrono::duration<Rep, Period>>(
std::chrono::seconds(tv.tv_sec) + std::chrono::nanoseconds(tv.tv_nsec));
}
};
} // namespace detail
// chrono -> timespec
template <typename T, typename Rep, typename Period>
auto duration_cast(std::chrono::duration<Rep, Period> const &d) ->
typename std::enable_if<std::is_same<T, struct timespec>::value,
struct timespec>::type {
return detail::posix_duration_cast<std::chrono::duration<Rep, Period>,
timespec>::cast(d);
}
// timespec -> chrono
template <typename Duration>
Duration duration_cast(struct timespec const &tv) {
return detail::posix_duration_cast<struct timespec, Duration>::cast(tv);
}
} // namespace chrono
} // namespace std
namespace utils {
template <typename Implementation>
class DeadlineTimer {
public:
virtual ~DeadlineTimer() = default;
template <typename WaitHandler>
void asyncWait(WaitHandler &&callback) {
static_cast<Implementation *>(this)->asyncWaitImpl(
std::forward<WaitHandler>(callback));
}
void wait() { static_cast<Implementation *>(this)->waitImpl(); }
template <typename T, typename R>
void expiresFromNow(std::chrono::duration<T, R> &&duration) {
static_cast<Implementation *>(this)->expiresFromNowImpl(
std::forward<std::chrono::duration<T, R>>(duration));
}
template <typename TimePoint,
typename = typename std::enable_if<
std::is_same<std::remove_reference_t<TimePoint>,
std::chrono::steady_clock::time_point>::value,
TimePoint>::type>
void expiresAt(TimePoint &&time_point) {
static_cast<Implementation *>(this)->expiresAtImpl(
std::forward<TimePoint>(time_point));
}
void cancel() { static_cast<Implementation *>(this)->cancelImpl(); }
};
} // namespace utils
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