fcb8d040e8
Instead of lengthy blurbs, switch to single-line, machine-readable standardized (https://spdx.dev) license identifiers. The Linux kernel switched long ago, so there is strong precedent. Three cases are handled: AGPL-only, Apache-only, and dual licensed. For the latter case, I chose (AGPL-3.0-or-later and Apache-2.0), reasoning that our changes are extensive enough to apply our license. The changes we applied mechanically with a script, except to licenses/README.md. Closes #9937
33 lines
612 B
C++
33 lines
612 B
C++
/*
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* SPDX-License-Identifier: Apache-2.0
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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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