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47 lines
1.3 KiB
C++
47 lines
1.3 KiB
C++
/*
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. 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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*
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* Copyright (C) 2021-present ScyllaDB
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*
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*/
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#pragma once
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#include "seastarx.hh"
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#include <seastar/core/semaphore.hh>
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namespace service {
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class memory_limiter final {
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size_t _mem_total;
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semaphore _sem;
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public:
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memory_limiter(size_t available_memory) noexcept
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: _mem_total(available_memory / 10)
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, _sem(_mem_total) {}
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future<> stop() {
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return _sem.wait(_mem_total);
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}
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size_t total_memory() const noexcept { return _mem_total; }
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semaphore& get_semaphore() noexcept { return _sem; }
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};
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} // namespace service
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