58 lines
1.8 KiB
C++
58 lines
1.8 KiB
C++
// Copyright 2021 The gRPC Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#ifndef GRPC_EVENT_ENGINE_MEMORY_REQUEST_H
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#define GRPC_EVENT_ENGINE_MEMORY_REQUEST_H
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#include <grpc/support/port_platform.h>
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#include <stddef.h>
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#include "absl/strings/string_view.h"
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namespace grpc_event_engine {
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namespace experimental {
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/// Reservation request - how much memory do we want to allocate?
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class MemoryRequest {
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public:
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/// Request a fixed amount of memory.
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// NOLINTNEXTLINE(google-explicit-constructor)
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MemoryRequest(size_t n) : min_(n), max_(n) {}
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/// Request a range of memory.
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/// Requires: \a min <= \a max.
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/// Requires: \a max <= max_size()
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MemoryRequest(size_t min, size_t max) : min_(min), max_(max) {}
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/// Maximum allowable request size - hard coded to 1GB.
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static constexpr size_t max_allowed_size() { return 1024 * 1024 * 1024; }
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/// Increase the size by \a amount.
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/// Undefined behavior if min() + amount or max() + amount overflows.
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MemoryRequest Increase(size_t amount) const {
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return MemoryRequest(min_ + amount, max_ + amount);
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}
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size_t min() const { return min_; }
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size_t max() const { return max_; }
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private:
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size_t min_;
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size_t max_;
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};
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} // namespace experimental
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} // namespace grpc_event_engine
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#endif // GRPC_EVENT_ENGINE_MEMORY_REQUEST_H
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