--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/hotspot/share/gc/z/zPageAllocator.hpp Tue Jun 12 17:40:28 2018 +0200
@@ -0,0 +1,108 @@
+/*
+ * Copyright (c) 2015, 2017, 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;
+ ZPreMappedMemory _pre_mapped;
+ const size_t _max_reserve;
+ 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 available(ZAllocationFlags flags) const;
+
+ 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 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();
+
+ void check_out_of_memory();
+};
+
+#endif // SHARE_GC_Z_ZPAGEALLOCATOR_HPP