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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 17:32:43 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 17:32:43 +0000
commit6bf0a5cb5034a7e684dcc3500e841785237ce2dd (patch)
treea68f146d7fa01f0134297619fbe7e33db084e0aa /layout/base/nsPresArena.h
parentInitial commit. (diff)
downloadthunderbird-upstream.tar.xz
thunderbird-upstream.zip
Adding upstream version 1:115.7.0.upstream/1%115.7.0upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'layout/base/nsPresArena.h')
-rw-r--r--layout/base/nsPresArena.h67
1 files changed, 67 insertions, 0 deletions
diff --git a/layout/base/nsPresArena.h b/layout/base/nsPresArena.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/.
+ */
+
+/* arena allocation for the frame tree and closely-related objects */
+
+#ifndef nsPresArena_h___
+#define nsPresArena_h___
+
+#include "mozilla/ArenaAllocator.h"
+#include "mozilla/ArenaObjectID.h"
+#include "mozilla/Assertions.h"
+#include "mozilla/MemoryChecking.h" // Note: Do not remove this, needed for MOZ_HAVE_MEM_CHECKS below
+#include "mozilla/MemoryReporting.h"
+#include <stdint.h>
+#include "nscore.h"
+#include "nsHashKeys.h"
+#include "nsTArray.h"
+#include "nsTHashtable.h"
+
+class nsWindowSizes;
+
+template <size_t ArenaSize, typename ObjectId, size_t ObjectIdCount>
+class nsPresArena {
+ public:
+ nsPresArena() = default;
+ ~nsPresArena();
+
+ /**
+ * Pool allocation with recycler lists indexed by object-type ID (see above).
+ * Every aID must always be used with the same object size, aSize.
+ */
+ void* Allocate(ObjectId aCode, size_t aSize);
+ void Free(ObjectId aCode, void* aPtr);
+
+ enum class ArenaKind { PresShell, DisplayList };
+ /**
+ * Increment nsWindowSizes with sizes of interesting objects allocated in this
+ * arena, and put the general unclassified size in the relevant field
+ * depending on the arena size.
+ */
+ void AddSizeOfExcludingThis(nsWindowSizes&, ArenaKind) const;
+
+ void Check() { mPool.Check(); }
+
+ private:
+ class FreeList {
+ public:
+ nsTArray<void*> mEntries;
+ size_t mEntrySize;
+ size_t mEntriesEverAllocated;
+
+ FreeList() : mEntrySize(0), mEntriesEverAllocated(0) {}
+
+ size_t SizeOfExcludingThis(mozilla::MallocSizeOf aMallocSizeOf) const {
+ return mEntries.ShallowSizeOfExcludingThis(aMallocSizeOf);
+ }
+ };
+
+ FreeList mFreeLists[ObjectIdCount];
+ mozilla::ArenaAllocator<ArenaSize, 8> mPool;
+};
+
+#endif