Mercurial > hg > graal-compiler
view src/share/vm/gc_implementation/g1/heapRegionSeq.hpp @ 948:89e0543e1737
6884624: Update copyright year
Summary: Update copyright for files that have been modified in 2009 through Septermber
Reviewed-by: tbell, ohair
author | xdono |
---|---|
date | Tue, 22 Sep 2009 14:06:10 -0700 |
parents | bd02caa94611 |
children | c18cbe5936b8 |
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/* * Copyright 2001-2009 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, * CA 95054 USA or visit www.sun.com if you need additional information or * have any questions. * */ class HeapRegion; class HeapRegionClosure; class HeapRegionSeq: public CHeapObj { // _regions is kept sorted by start address order, and no two regions are // overlapping. GrowableArray<HeapRegion*> _regions; // The index in "_regions" at which to start the next allocation search. // (For efficiency only; private to obj_allocate after initialization.) int _alloc_search_start; // Attempts to allocate a block of the (assumed humongous) word_size, // starting at the region "ind". HeapWord* alloc_obj_from_region_index(int ind, size_t word_size); // Currently, we're choosing collection sets in a round-robin fashion, // starting here. int _next_rr_candidate; // The bottom address of the bottom-most region, or else NULL if there // are no regions in the sequence. char* _seq_bottom; public: // Initializes "this" to the empty sequence of regions. HeapRegionSeq(const size_t max_size); // Adds "hr" to "this" sequence. Requires "hr" not to overlap with // any region already in "this". (Will perform better if regions are // inserted in ascending address order.) void insert(HeapRegion* hr); // Given a HeapRegion*, returns its index within _regions, // or returns -1 if not found. int find(HeapRegion* hr); // Requires the index to be valid, and return the region at the index. HeapRegion* at(size_t i) { return _regions.at((int)i); } // Return the number of regions in the sequence. size_t length(); // Returns the number of contiguous regions at the end of the sequence // that are available for allocation. size_t free_suffix(); // Requires "word_size" to be humongous (in the technical sense). If // possible, allocates a contiguous subsequence of the heap regions to // satisfy the allocation, and returns the address of the beginning of // that sequence, otherwise returns NULL. HeapWord* obj_allocate(size_t word_size); // Apply the "doHeapRegion" method of "blk" to all regions in "this", // in address order, terminating the iteration early // if the "doHeapRegion" method returns "true". void iterate(HeapRegionClosure* blk); // Apply the "doHeapRegion" method of "blk" to all regions in "this", // starting at "r" (or first region, if "r" is NULL), in a circular // manner, terminating the iteration early if the "doHeapRegion" method // returns "true". void iterate_from(HeapRegion* r, HeapRegionClosure* blk); // As above, but start from a given index in the sequence // instead of a given heap region. void iterate_from(int idx, HeapRegionClosure* blk); // Requires "shrink_bytes" to be a multiple of the page size and heap // region granularity. Deletes as many "rightmost" completely free heap // regions from the sequence as comprise shrink_bytes bytes. Returns the // MemRegion indicating the region those regions comprised, and sets // "num_regions_deleted" to the number of regions deleted. MemRegion shrink_by(size_t shrink_bytes, size_t& num_regions_deleted); // If "addr" falls within a region in the sequence, return that region, // or else NULL. HeapRegion* addr_to_region(const void* addr); void print(); // Prints out runs of empty regions. void print_empty_runs(); };