80 lines
3.1 KiB
C++
80 lines
3.1 KiB
C++
/*
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* Copyright (c) 2015, 2019, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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#ifndef SHARE_GC_Z_ZOBJECTALLOCATOR_HPP
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#define SHARE_GC_Z_ZOBJECTALLOCATOR_HPP
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#include "gc/z/zAllocationFlags.hpp"
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#include "gc/z/zPage.hpp"
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#include "gc/z/zValue.hpp"
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#include "memory/allocation.hpp"
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class ZObjectAllocator {
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private:
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ZPerCPU<size_t> _used;
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ZPerCPU<size_t> _undone;
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ZContended<ZPage*> _shared_medium_page;
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ZPerCPU<ZPage*> _shared_small_page;
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ZPerWorker<ZPage*> _worker_small_page;
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ZPage* alloc_page(uint8_t type, size_t size, ZAllocationFlags flags);
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void undo_alloc_page(ZPage* page);
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// Allocate an object in a shared page. Allocate and
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// atomically install a new page if necessary.
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uintptr_t alloc_object_in_shared_page(ZPage** shared_page,
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uint8_t page_type,
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size_t page_size,
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size_t size,
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ZAllocationFlags flags);
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uintptr_t alloc_large_object(size_t size, ZAllocationFlags flags);
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uintptr_t alloc_medium_object(size_t size, ZAllocationFlags flags);
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uintptr_t alloc_small_object_from_nonworker(size_t size, ZAllocationFlags flags);
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uintptr_t alloc_small_object_from_worker(size_t size, ZAllocationFlags flags);
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uintptr_t alloc_small_object(size_t size, ZAllocationFlags flags);
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uintptr_t alloc_object(size_t size, ZAllocationFlags flags);
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bool undo_alloc_large_object(ZPage* page);
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bool undo_alloc_medium_object(ZPage* page, uintptr_t addr, size_t size);
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bool undo_alloc_small_object_from_nonworker(ZPage* page, uintptr_t addr, size_t size);
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bool undo_alloc_small_object_from_worker(ZPage* page, uintptr_t addr, size_t size);
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bool undo_alloc_small_object(ZPage* page, uintptr_t addr, size_t size);
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bool undo_alloc_object(ZPage* page, uintptr_t addr, size_t size);
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public:
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ZObjectAllocator();
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uintptr_t alloc_object(size_t size);
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uintptr_t alloc_object_for_relocation(size_t size);
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void undo_alloc_object_for_relocation(ZPage* page, uintptr_t addr, size_t size);
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size_t used() const;
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size_t remaining() const;
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void retire_pages();
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};
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#endif // SHARE_GC_Z_ZOBJECTALLOCATOR_HPP
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