75 lines
2.6 KiB
C++
75 lines
2.6 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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* vim: set ts=8 sts=2 et sw=2 tw=80:
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef vm_SharedImmutableStringsCache_inl_h
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#define vm_SharedImmutableStringsCache_inl_h
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#include "vm/SharedImmutableStringsCache.h"
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namespace js {
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template <typename IntoOwnedChars>
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[[nodiscard]] SharedImmutableString SharedImmutableStringsCache::getOrCreate(
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const char* chars, size_t length, IntoOwnedChars intoOwnedChars) {
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MOZ_ASSERT(inner_);
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MOZ_ASSERT(chars);
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Hasher::Lookup lookup(Hasher::hashLongString(chars, length), chars, length);
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auto locked = inner_->lock();
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auto entry = locked->set.lookupForAdd(lookup);
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if (!entry) {
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OwnedChars ownedChars(intoOwnedChars());
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if (!ownedChars) {
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return SharedImmutableString();
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}
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MOZ_ASSERT(ownedChars.get() == chars ||
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memcmp(ownedChars.get(), chars, length) == 0);
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auto box = StringBox::Create(std::move(ownedChars), length, inner_);
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if (!box || !locked->set.add(entry, std::move(box))) {
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return SharedImmutableString();
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}
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}
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MOZ_ASSERT(entry && *entry);
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return SharedImmutableString(entry->get());
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}
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template <typename IntoOwnedTwoByteChars>
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[[nodiscard]] SharedImmutableTwoByteString
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SharedImmutableStringsCache::getOrCreate(
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const char16_t* chars, size_t length,
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IntoOwnedTwoByteChars intoOwnedTwoByteChars) {
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MOZ_ASSERT(inner_);
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MOZ_ASSERT(chars);
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auto hash = Hasher::hashLongString(reinterpret_cast<const char*>(chars),
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length * sizeof(char16_t));
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Hasher::Lookup lookup(hash, chars, length);
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auto locked = inner_->lock();
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auto entry = locked->set.lookupForAdd(lookup);
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if (!entry) {
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OwnedTwoByteChars ownedTwoByteChars(intoOwnedTwoByteChars());
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if (!ownedTwoByteChars) {
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return SharedImmutableTwoByteString();
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}
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MOZ_ASSERT(
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ownedTwoByteChars.get() == chars ||
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memcmp(ownedTwoByteChars.get(), chars, length * sizeof(char16_t)) == 0);
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OwnedChars ownedChars(reinterpret_cast<char*>(ownedTwoByteChars.release()));
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auto box = StringBox::Create(std::move(ownedChars),
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length * sizeof(char16_t), inner_);
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if (!box || !locked->set.add(entry, std::move(box))) {
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return SharedImmutableTwoByteString();
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}
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}
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MOZ_ASSERT(entry && *entry);
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return SharedImmutableTwoByteString(entry->get());
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}
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} // namespace js
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#endif // vm_SharedImmutableStringsCache_inl_h
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