| /* |
| * Copyright (c) 2015, 2018, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| #ifndef SHARE_GC_Z_ZPAGEALLOCATOR_HPP |
| #define SHARE_GC_Z_ZPAGEALLOCATOR_HPP |
| |
| #include "gc/z/zAllocationFlags.hpp" |
| #include "gc/z/zList.hpp" |
| #include "gc/z/zLock.hpp" |
| #include "gc/z/zPageCache.hpp" |
| #include "gc/z/zPhysicalMemory.hpp" |
| #include "gc/z/zPreMappedMemory.hpp" |
| #include "gc/z/zVirtualMemory.hpp" |
| #include "memory/allocation.hpp" |
| |
| class ZPageAllocRequest; |
| |
| class ZPageAllocator { |
| friend class VMStructs; |
| |
| private: |
| ZLock _lock; |
| ZVirtualMemoryManager _virtual; |
| ZPhysicalMemoryManager _physical; |
| ZPageCache _cache; |
| const size_t _max_reserve; |
| ZPreMappedMemory _pre_mapped; |
| size_t _used_high; |
| size_t _used_low; |
| size_t _used; |
| size_t _allocated; |
| ssize_t _reclaimed; |
| ZList<ZPageAllocRequest> _queue; |
| ZList<ZPage> _detached; |
| |
| static ZPage* const gc_marker; |
| |
| void increase_used(size_t size, bool relocation); |
| void decrease_used(size_t size, bool reclaimed); |
| |
| size_t max_available(bool no_reserve) const; |
| size_t try_ensure_unused(size_t size, bool no_reserve); |
| size_t try_ensure_unused_for_pre_mapped(size_t size); |
| |
| ZPage* create_page(uint8_t type, size_t size); |
| void map_page(ZPage* page); |
| void detach_page(ZPage* page); |
| void flush_pre_mapped(); |
| void flush_cache(size_t size); |
| |
| void check_out_of_memory_during_initialization(); |
| |
| ZPage* alloc_page_common_inner(uint8_t type, size_t size, ZAllocationFlags flags); |
| ZPage* alloc_page_common(uint8_t type, size_t size, ZAllocationFlags flags); |
| ZPage* alloc_page_blocking(uint8_t type, size_t size, ZAllocationFlags flags); |
| ZPage* alloc_page_nonblocking(uint8_t type, size_t size, ZAllocationFlags flags); |
| |
| void satisfy_alloc_queue(); |
| |
| void detach_memory(const ZVirtualMemory& vmem, ZPhysicalMemory& pmem); |
| |
| public: |
| ZPageAllocator(size_t min_capacity, size_t max_capacity, size_t max_reserve); |
| |
| bool is_initialized() const; |
| |
| size_t max_capacity() const; |
| size_t current_max_capacity() const; |
| size_t capacity() const; |
| size_t max_reserve() const; |
| size_t used_high() const; |
| size_t used_low() const; |
| size_t used() const; |
| size_t allocated() const; |
| size_t reclaimed() const; |
| |
| void reset_statistics(); |
| |
| ZPage* alloc_page(uint8_t type, size_t size, ZAllocationFlags flags); |
| void flip_page(ZPage* page); |
| void free_page(ZPage* page, bool reclaimed); |
| void destroy_page(ZPage* page); |
| |
| void flush_detached_pages(ZList<ZPage>* list); |
| |
| void flip_pre_mapped(); |
| |
| bool is_alloc_stalled() const; |
| void check_out_of_memory(); |
| }; |
| |
| #endif // SHARE_GC_Z_ZPAGEALLOCATOR_HPP |