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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* vim: set ts=8 sts=2 et sw=2 tw=80:
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef vm_SharedImmutableStringsCache_inl_h
#define vm_SharedImmutableStringsCache_inl_h
#include "vm/SharedImmutableStringsCache.h"
namespace js {
template <typename IntoOwnedChars>
[[nodiscard]] mozilla::Maybe<SharedImmutableString>
SharedImmutableStringsCache::getOrCreate(const char* chars, size_t length,
IntoOwnedChars intoOwnedChars) {
MOZ_ASSERT(inner_);
MOZ_ASSERT(chars);
Hasher::Lookup lookup(Hasher::hashLongString(chars, length), chars, length);
auto locked = inner_->lock();
auto entry = locked->set.lookupForAdd(lookup);
if (!entry) {
OwnedChars ownedChars(intoOwnedChars());
if (!ownedChars) {
return mozilla::Nothing();
}
MOZ_ASSERT(ownedChars.get() == chars ||
memcmp(ownedChars.get(), chars, length) == 0);
auto box = StringBox::Create(std::move(ownedChars), length);
if (!box || !locked->set.add(entry, std::move(box))) {
return mozilla::Nothing();
}
}
MOZ_ASSERT(entry && *entry);
return mozilla::Some(SharedImmutableString(locked, entry->get()));
}
template <typename IntoOwnedTwoByteChars>
[[nodiscard]] mozilla::Maybe<SharedImmutableTwoByteString>
SharedImmutableStringsCache::getOrCreate(
const char16_t* chars, size_t length,
IntoOwnedTwoByteChars intoOwnedTwoByteChars) {
MOZ_ASSERT(inner_);
MOZ_ASSERT(chars);
auto hash = Hasher::hashLongString(reinterpret_cast<const char*>(chars),
length * sizeof(char16_t));
Hasher::Lookup lookup(hash, chars, length);
auto locked = inner_->lock();
auto entry = locked->set.lookupForAdd(lookup);
if (!entry) {
OwnedTwoByteChars ownedTwoByteChars(intoOwnedTwoByteChars());
if (!ownedTwoByteChars) {
return mozilla::Nothing();
}
MOZ_ASSERT(
ownedTwoByteChars.get() == chars ||
memcmp(ownedTwoByteChars.get(), chars, length * sizeof(char16_t)) == 0);
OwnedChars ownedChars(reinterpret_cast<char*>(ownedTwoByteChars.release()));
auto box =
StringBox::Create(std::move(ownedChars), length * sizeof(char16_t));
if (!box || !locked->set.add(entry, std::move(box))) {
return mozilla::Nothing();
}
}
MOZ_ASSERT(entry && *entry);
return mozilla::Some(SharedImmutableTwoByteString(locked, entry->get()));
}
} // namespace js
#endif // vm_SharedImmutableStringsCache_inl_h