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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-19 00:47:55 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-19 00:47:55 +0000
commit26a029d407be480d791972afb5975cf62c9360a6 (patch)
treef435a8308119effd964b339f76abb83a57c29483 /js/src/vm/SharedImmutableStringsCache-inl.h
parentInitial commit. (diff)
downloadfirefox-26a029d407be480d791972afb5975cf62c9360a6.tar.xz
firefox-26a029d407be480d791972afb5975cf62c9360a6.zip
Adding upstream version 124.0.1.upstream/124.0.1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'js/src/vm/SharedImmutableStringsCache-inl.h')
-rw-r--r--js/src/vm/SharedImmutableStringsCache-inl.h75
1 files changed, 75 insertions, 0 deletions
diff --git a/js/src/vm/SharedImmutableStringsCache-inl.h b/js/src/vm/SharedImmutableStringsCache-inl.h
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+++ b/js/src/vm/SharedImmutableStringsCache-inl.h
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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]] 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 SharedImmutableString();
+ }
+ MOZ_ASSERT(ownedChars.get() == chars ||
+ memcmp(ownedChars.get(), chars, length) == 0);
+ auto box = StringBox::Create(std::move(ownedChars), length, inner_);
+ if (!box || !locked->set.add(entry, std::move(box))) {
+ return SharedImmutableString();
+ }
+ }
+
+ MOZ_ASSERT(entry && *entry);
+ return SharedImmutableString(entry->get());
+}
+
+template <typename IntoOwnedTwoByteChars>
+[[nodiscard]] 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 SharedImmutableTwoByteString();
+ }
+ 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), inner_);
+ if (!box || !locked->set.add(entry, std::move(box))) {
+ return SharedImmutableTwoByteString();
+ }
+ }
+
+ MOZ_ASSERT(entry && *entry);
+ return SharedImmutableTwoByteString(entry->get());
+}
+
+} // namespace js
+
+#endif // vm_SharedImmutableStringsCache_inl_h