author | pliden |
Wed, 20 Nov 2019 10:37:46 +0100 | |
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/* |
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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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const bool _use_per_cpu_shared_small_pages; |
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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** shared_small_page_addr(); |
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ZPage* const* shared_small_page_addr() const; |
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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 |