3c74dc9f4d
This patch adds two macros to declare per-type allocators: - JS_DECLARE_ALLOCATOR(TypeName) - JS_DEFINE_ALLOCATOR(TypeName) When used, they add a type-specific CellAllocator that the Heap will delegate allocation requests to. The result of this is that GC objects of the same type always end up within the same HeapBlock, drastically reducing the ability to perform type confusion attacks. It also improves HeapBlock utilization, since each block now has cells sized exactly to the type used within that block. (Previously we only had a handful of block sizes available, and most GC allocations ended up with a large amount of slack in their tails.) There is a small performance hit from this, but I'm sure we can make up for it elsewhere. Note that the old size-based allocators still exist, and we fall back to them for any type that doesn't have its own CellAllocator.
47 lines
1.7 KiB
C++
47 lines
1.7 KiB
C++
/*
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* Copyright (c) 2022-2023, Tim Flynn <trflynn89@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/String.h>
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#include <AK/StringView.h>
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#include <LibJS/Runtime/Completion.h>
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#include <LibJS/Runtime/Intl/NumberFormat.h>
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#include <LibJS/Runtime/Object.h>
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#include <LibLocale/PluralRules.h>
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namespace JS::Intl {
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class PluralRules final : public NumberFormatBase {
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JS_OBJECT(PluralRules, NumberFormatBase);
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JS_DECLARE_ALLOCATOR(PluralRules);
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public:
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virtual ~PluralRules() override = default;
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::Locale::PluralForm type() const { return m_type; }
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StringView type_string() const { return ::Locale::plural_form_to_string(m_type); }
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void set_type(StringView type) { m_type = ::Locale::plural_form_from_string(type); }
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private:
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explicit PluralRules(Object& prototype);
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::Locale::PluralForm m_type { ::Locale::PluralForm::Cardinal }; // [[Type]]
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};
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struct ResolvedPlurality {
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::Locale::PluralCategory plural_category; // [[PluralCategory]]
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String formatted_string; // [[FormattedString]]
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};
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::Locale::PluralOperands get_operands(StringView string);
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::Locale::PluralCategory plural_rule_select(StringView locale, ::Locale::PluralForm type, Value number, ::Locale::PluralOperands operands);
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ResolvedPlurality resolve_plural(PluralRules const&, Value number);
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ResolvedPlurality resolve_plural(NumberFormatBase const& number_format, ::Locale::PluralForm type, Value number);
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::Locale::PluralCategory plural_rule_select_range(StringView locale, ::Locale::PluralForm, ::Locale::PluralCategory start, ::Locale::PluralCategory end);
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ThrowCompletionOr<::Locale::PluralCategory> resolve_plural_range(VM&, PluralRules const&, Value start, Value end);
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}
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