Mercurial > hg > truffle
diff src/share/vm/memory/space.inline.hpp @ 0:a61af66fc99e jdk7-b24
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author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
parents | |
children | 37f87013dfd8 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/share/vm/memory/space.inline.hpp Sat Dec 01 00:00:00 2007 +0000 @@ -0,0 +1,68 @@ +/* + * Copyright 2000-2006 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. + * + */ + +inline HeapWord* OffsetTableContigSpace::allocate(size_t size) { + HeapWord* res = ContiguousSpace::allocate(size); + if (res != NULL) { + _offsets.alloc_block(res, size); + } + return res; +} + +// Because of the requirement of keeping "_offsets" up to date with the +// allocations, we sequentialize these with a lock. Therefore, best if +// this is used for larger LAB allocations only. +inline HeapWord* OffsetTableContigSpace::par_allocate(size_t size) { + MutexLocker x(&_par_alloc_lock); + // This ought to be just "allocate", because of the lock above, but that + // ContiguousSpace::allocate asserts that either the allocating thread + // holds the heap lock or it is the VM thread and we're at a safepoint. + // The best I (dld) could figure was to put a field in ContiguousSpace + // meaning "locking at safepoint taken care of", and set/reset that + // here. But this will do for now, especially in light of the comment + // above. Perhaps in the future some lock-free manner of keeping the + // coordination. + HeapWord* res = ContiguousSpace::par_allocate(size); + if (res != NULL) { + _offsets.alloc_block(res, size); + } + return res; +} + +inline HeapWord* OffsetTableContigSpace::block_start(const void* p) const { + return _offsets.block_start(p); +} + +inline HeapWord* ContiguousSpace::concurrent_iteration_safe_limit() +{ + assert(_concurrent_iteration_safe_limit <= top(), + "_concurrent_iteration_safe_limit update missed"); + return _concurrent_iteration_safe_limit; +} + +inline void ContiguousSpace::set_concurrent_iteration_safe_limit(HeapWord* new_limit) +{ + assert(new_limit <= top(), "uninitialized objects in the safe range"); + _concurrent_iteration_safe_limit = new_limit; +}