66 lines
1.9 KiB
C++
66 lines
1.9 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_ZVIRTUALMEMORY_HPP
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#define SHARE_GC_Z_ZVIRTUALMEMORY_HPP
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#include "gc/z/zMemory.hpp"
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class ZVirtualMemory {
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friend class VMStructs;
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private:
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uintptr_t _start;
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uintptr_t _end;
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public:
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ZVirtualMemory();
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ZVirtualMemory(uintptr_t start, size_t size);
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bool is_null() const;
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uintptr_t start() const;
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uintptr_t end() const;
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size_t size() const;
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ZVirtualMemory split(size_t size);
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};
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class ZVirtualMemoryManager {
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private:
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ZMemoryManager _manager;
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bool _initialized;
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bool reserve(uintptr_t start, size_t size);
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void nmt_reserve(uintptr_t start, size_t size);
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public:
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ZVirtualMemoryManager();
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bool is_initialized() const;
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ZVirtualMemory alloc(size_t size, bool alloc_from_front = false);
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void free(const ZVirtualMemory& vmem);
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};
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#endif // SHARE_GC_Z_ZVIRTUALMEMORY_HPP
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