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1682f0b760
SPDX License Identifiers are a more compact / standardized way of representing file license information. See: https://spdx.dev/resources/use/#identifiers This was done with the `ambr` search and replace tool. ambr --no-parent-ignore --key-from-file --rep-from-file key.txt rep.txt *
47 lines
931 B
C++
47 lines
931 B
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/Forward.h>
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#include <AK/HashTable.h>
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namespace AK {
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class IDAllocator {
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public:
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IDAllocator() = default;
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~IDAllocator() = default;
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int allocate()
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{
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int r = rand();
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for (int i = 0; i < 100000; ++i) {
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int allocated_id = r + i;
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// Make sure we never vend ID 0, as some code may interpret that as "no ID"
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if (allocated_id == 0)
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++allocated_id;
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if (!m_allocated_ids.contains(allocated_id)) {
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m_allocated_ids.set(allocated_id);
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return allocated_id;
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}
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}
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VERIFY_NOT_REACHED();
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}
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void deallocate(int id)
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{
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m_allocated_ids.remove(id);
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}
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private:
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HashTable<int> m_allocated_ids;
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};
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}
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using AK::IDAllocator;
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