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/*
*
* Copyright 2016 gRPC authors.
*
* 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.
*
*/
#include <grpc/support/port_platform.h>
#include "src/core/lib/backoff/backoff.h"
#include <algorithm>
#include "src/core/lib/gpr/useful.h"
namespace grpc_core {
BackOff::BackOff(const Options& options) : options_(options) { Reset(); }
Timestamp BackOff::NextAttemptTime() {
if (initial_) {
initial_ = false;
return current_backoff_ + ExecCtx::Get()->Now();
}
current_backoff_ = std::min(current_backoff_ * options_.multiplier(),
options_.max_backoff());
const Duration jitter = Duration::FromSecondsAsDouble(
absl::Uniform(rand_gen_, -options_.jitter() * current_backoff_.seconds(),
options_.jitter() * current_backoff_.seconds()));
return ExecCtx::Get()->Now() + current_backoff_ + jitter;
}
void BackOff::Reset() {
current_backoff_ = options_.initial_backoff();
initial_ = true;
}
} // namespace grpc_core
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