iposva@google.com
1cae9b9c40
Review URL: https://codereview.chromium.org//649743002 git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@41049 260f80e4-7a28-3924-810f-c04153c831b5
47 lines
1.4 KiB
C++
47 lines
1.4 KiB
C++
// Copyright (c) 2011, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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#ifndef VM_GC_SWEEPER_H_
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#define VM_GC_SWEEPER_H_
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#include "vm/globals.h"
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namespace dart {
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// Forward declarations.
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class FreeList;
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class Heap;
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class HeapPage;
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class Isolate;
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class PageSpace;
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// The class GCSweeper is used to visit the heap after marking to reclaim unused
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// memory.
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class GCSweeper {
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public:
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GCSweeper() {}
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~GCSweeper() {}
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// Sweep the memory area for the page while clearing the mark bits and adding
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// all the unmarked objects to the freelist. Whether the freelist is
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// pre-locked is indicated by the locked parameter.
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// Returns true if the page is in use. Freelist is untouched if page is not
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// in use.
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bool SweepPage(HeapPage* page, FreeList* freelist, bool locked);
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// Returns the number of words from page->object_start() to the end of the
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// last marked object.
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intptr_t SweepLargePage(HeapPage* page);
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// Sweep the regular sized data pages between first and last inclusive.
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static void SweepConcurrent(Isolate* isolate,
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HeapPage* first,
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HeapPage* last,
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FreeList* freelist);
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};
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} // namespace dart
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#endif // VM_GC_SWEEPER_H_
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