From 6bf0a5cb5034a7e684dcc3500e841785237ce2dd Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 19:32:43 +0200 Subject: Adding upstream version 1:115.7.0. Signed-off-by: Daniel Baumann --- xpcom/ds/nsTArray.cpp | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+) create mode 100644 xpcom/ds/nsTArray.cpp (limited to 'xpcom/ds/nsTArray.cpp') diff --git a/xpcom/ds/nsTArray.cpp b/xpcom/ds/nsTArray.cpp new file mode 100644 index 0000000000..50326fb331 --- /dev/null +++ b/xpcom/ds/nsTArray.cpp @@ -0,0 +1,28 @@ +/* -*- 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/. */ + +#include +#include "nsTArray.h" +#include "nsXPCOM.h" +#include "nsCycleCollectionNoteChild.h" +#include "nsDebug.h" +#include "mozilla/CheckedInt.h" +#include "mozilla/IntegerPrintfMacros.h" + +// Ensure this is sufficiently aligned so that Elements() and co don't create +// unaligned pointers, or slices with unaligned pointers for empty arrays, see +// https://github.com/servo/servo/issues/22613. +alignas(8) const nsTArrayHeader sEmptyTArrayHeader = {0, 0, 0}; + +bool IsTwiceTheRequiredBytesRepresentableAsUint32(size_t aCapacity, + size_t aElemSize) { + using mozilla::CheckedUint32; + return ((CheckedUint32(aCapacity) * aElemSize) * 2).isValid(); +} + +void ::detail::SetCycleCollectionArrayFlag(uint32_t& aFlags) { + aFlags |= CycleCollectionEdgeNameArrayFlag; +} -- cgit v1.2.3