chromium/third_party/grpc/src/src/core/lib/resource_quota/periodic_update.h

// Copyright 2022 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.

#ifndef GRPC_SRC_CORE_LIB_RESOURCE_QUOTA_PERIODIC_UPDATE_H
#define GRPC_SRC_CORE_LIB_RESOURCE_QUOTA_PERIODIC_UPDATE_H

#include <grpc/support/port_platform.h>

#include <inttypes.h>

#include <atomic>

#include "absl/functional/function_ref.h"

#include "src/core/lib/gprpp/time.h"

namespace grpc_core {

// Lightweight timer-like mechanism for periodic updates.
// Fast path only decrements an atomic int64.
// Slow path runs corrections and estimates how many ticks are required to hit
// the target period.
// This is super inaccurate of course, but for places where we can't run timers,
// or places where continuous registration/unregistration would cause problems
// it can be quite useful.
class PeriodicUpdate { … };

}  // namespace grpc_core

#endif  // GRPC_SRC_CORE_LIB_RESOURCE_QUOTA_PERIODIC_UPDATE_H