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482b548233
Reserve bytecode tables and executable vectors from FFI counts before filling them during Rust bytecode materialization. This avoids repeated growth for data whose final size is already known.
58 lines
1.6 KiB
C++
58 lines
1.6 KiB
C++
/*
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* Copyright (c) 2021, Andreas Kling <andreas@ladybird.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/DistinctNumeric.h>
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#include <AK/Utf16FlyString.h>
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#include <AK/Vector.h>
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#include <LibJS/Runtime/ExternalMemory.h>
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namespace JS::Bytecode {
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struct IdentifierTableIndex {
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static constexpr u32 invalid = 0xffffffffu;
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bool is_valid() const { return value != invalid; }
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u32 value { 0 };
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};
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class IdentifierTable {
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AK_MAKE_NONMOVABLE(IdentifierTable);
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AK_MAKE_NONCOPYABLE(IdentifierTable);
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public:
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IdentifierTable() = default;
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IdentifierTableIndex insert(Utf16FlyString);
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Utf16FlyString const& get(IdentifierTableIndex) const;
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void dump() const;
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void ensure_capacity(size_t capacity) { m_identifiers.ensure_capacity(capacity); }
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bool is_empty() const { return m_identifiers.is_empty(); }
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size_t external_memory_size() const { return vector_external_memory_size(m_identifiers); }
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ReadonlySpan<Utf16FlyString const> identifiers() const { return m_identifiers; }
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private:
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Vector<Utf16FlyString> m_identifiers;
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};
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}
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namespace AK {
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template<>
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struct SentinelOptionalTraits<JS::Bytecode::IdentifierTableIndex> {
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static constexpr JS::Bytecode::IdentifierTableIndex sentinel_value() { return { JS::Bytecode::IdentifierTableIndex::invalid }; }
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static constexpr bool is_sentinel(JS::Bytecode::IdentifierTableIndex const& value) { return !value.is_valid(); }
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};
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template<>
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class Optional<JS::Bytecode::IdentifierTableIndex> : public SentinelOptional<JS::Bytecode::IdentifierTableIndex> {
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public:
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using SentinelOptional::SentinelOptional;
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};
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}
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