зеркало из https://github.com/mozilla/gecko-dev.git
36 строки
1.4 KiB
C++
36 строки
1.4 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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#include <string.h>
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#include "nsTArray.h"
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#include "nsXPCOM.h"
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#include "nsCycleCollectionNoteChild.h"
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#include "nsDebug.h"
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#include "mozilla/CheckedInt.h"
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#include "mozilla/IntegerPrintfMacros.h"
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// Ensure this is sufficiently aligned so that Elements() and co don't create
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// unaligned pointers, or slices with unaligned pointers for empty arrays, see
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// https://github.com/servo/servo/issues/22613.
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alignas(8) const nsTArrayHeader sEmptyTArrayHeader = {0, 0, 0};
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bool IsTwiceTheRequiredBytesRepresentableAsUint32(size_t aCapacity,
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size_t aElemSize) {
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using mozilla::CheckedUint32;
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return ((CheckedUint32(aCapacity) * aElemSize) * 2).isValid();
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}
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MOZ_NORETURN MOZ_COLD void InvalidArrayIndex_CRASH(size_t aIndex,
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size_t aLength) {
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MOZ_CRASH_UNSAFE_PRINTF(
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"ElementAt(aIndex = %" PRIu64 ", aLength = %" PRIu64 ")",
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static_cast<uint64_t>(aIndex), static_cast<uint64_t>(aLength));
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}
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void ::detail::SetCycleCollectionArrayFlag(uint32_t& aFlags) {
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aFlags |= CycleCollectionEdgeNameArrayFlag;
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}
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