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// Copyright 2021 The 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_EVENT_ENGINE_MEMORY_REQUEST_H
#define GRPC_EVENT_ENGINE_MEMORY_REQUEST_H
#include <grpc/support/port_platform.h>
#include <stddef.h>
#include "y_absl/strings/string_view.h"
namespace grpc_event_engine {
namespace experimental {
/// Reservation request - how much memory do we want to allocate?
class MemoryRequest {
public:
/// Request a fixed amount of memory.
// NOLINTNEXTLINE(google-explicit-constructor)
MemoryRequest(size_t n) : min_(n), max_(n) {}
/// Request a range of memory.
/// Requires: \a min <= \a max.
/// Requires: \a max <= max_size()
MemoryRequest(size_t min, size_t max) : min_(min), max_(max) {}
/// Maximum allowable request size - hard coded to 1GB.
static constexpr size_t max_allowed_size() { return 1024 * 1024 * 1024; }
/// Increase the size by \a amount.
/// Undefined behavior if min() + amount or max() + amount overflows.
MemoryRequest Increase(size_t amount) const {
return MemoryRequest(min_ + amount, max_ + amount);
}
size_t min() const { return min_; }
size_t max() const { return max_; }
private:
size_t min_;
size_t max_;
};
} // namespace experimental
} // namespace grpc_event_engine
#endif // GRPC_EVENT_ENGINE_MEMORY_REQUEST_H
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