| /* |
| * |
| * 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/iomgr/exec_ctx.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 |