113 lines
3.6 KiB
C++
113 lines
3.6 KiB
C++
/*
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* Copyright (c) 2015, 2018, 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_ZPAGEALLOCATOR_HPP
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#define SHARE_GC_Z_ZPAGEALLOCATOR_HPP
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#include "gc/z/zAllocationFlags.hpp"
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#include "gc/z/zList.hpp"
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#include "gc/z/zLock.hpp"
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#include "gc/z/zPageCache.hpp"
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#include "gc/z/zPhysicalMemory.hpp"
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#include "gc/z/zPreMappedMemory.hpp"
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#include "gc/z/zVirtualMemory.hpp"
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#include "memory/allocation.hpp"
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class ZPageAllocRequest;
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class ZPageAllocator {
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friend class VMStructs;
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private:
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ZLock _lock;
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ZVirtualMemoryManager _virtual;
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ZPhysicalMemoryManager _physical;
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ZPageCache _cache;
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const size_t _max_reserve;
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ZPreMappedMemory _pre_mapped;
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size_t _used_high;
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size_t _used_low;
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size_t _used;
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size_t _allocated;
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ssize_t _reclaimed;
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ZList<ZPageAllocRequest> _queue;
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ZList<ZPage> _detached;
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static ZPage* const gc_marker;
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void increase_used(size_t size, bool relocation);
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void decrease_used(size_t size, bool reclaimed);
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size_t max_available(bool no_reserve) const;
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size_t try_ensure_unused(size_t size, bool no_reserve);
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size_t try_ensure_unused_for_pre_mapped(size_t size);
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ZPage* create_page(uint8_t type, size_t size);
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void map_page(ZPage* page);
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void detach_page(ZPage* page);
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void flush_pre_mapped();
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void flush_cache(size_t size);
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void check_out_of_memory_during_initialization();
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ZPage* alloc_page_common_inner(uint8_t type, size_t size, ZAllocationFlags flags);
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ZPage* alloc_page_common(uint8_t type, size_t size, ZAllocationFlags flags);
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ZPage* alloc_page_blocking(uint8_t type, size_t size, ZAllocationFlags flags);
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ZPage* alloc_page_nonblocking(uint8_t type, size_t size, ZAllocationFlags flags);
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void satisfy_alloc_queue();
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void detach_memory(const ZVirtualMemory& vmem, ZPhysicalMemory& pmem);
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public:
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ZPageAllocator(size_t min_capacity, size_t max_capacity, size_t max_reserve);
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bool is_initialized() const;
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size_t max_capacity() const;
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size_t current_max_capacity() const;
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size_t capacity() const;
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size_t max_reserve() const;
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size_t used_high() const;
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size_t used_low() const;
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size_t used() const;
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size_t allocated() const;
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size_t reclaimed() const;
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void reset_statistics();
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ZPage* alloc_page(uint8_t type, size_t size, ZAllocationFlags flags);
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void flip_page(ZPage* page);
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void free_page(ZPage* page, bool reclaimed);
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void destroy_page(ZPage* page);
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void flush_detached_pages(ZList<ZPage>* list);
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void flip_pre_mapped();
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bool is_alloc_stalled() const;
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void check_out_of_memory();
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};
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#endif // SHARE_GC_Z_ZPAGEALLOCATOR_HPP
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