1 /* 2 * Copyright (c) 1998, 2003, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 // these inline functions are in a separate file to break an include cycle 26 // between Thread and Handle 27 28 inline Handle::Handle(oop obj) { 29 if (obj == NULL) { 30 _handle = NULL; 31 } else { 32 _handle = Thread::current()->handle_area()->allocate_handle(obj); 33 } 34 } 35 36 37 #ifndef ASSERT 38 inline Handle::Handle(Thread* thread, oop obj) { 39 assert(thread == Thread::current(), "sanity check"); 40 if (obj == NULL) { 41 _handle = NULL; 42 } else { 43 _handle = thread->handle_area()->allocate_handle(obj); 44 } 45 } 46 #endif // ASSERT 47 48 49 inline HandleMark::HandleMark() { 50 initialize(Thread::current()); 51 } 52 53 54 inline void HandleMark::push() { 55 // This is intentionally a NOP. pop_and_restore will reset 56 // values to the HandleMark further down the stack, typically 57 // in JavaCalls::call_helper. 58 debug_only(_area->_handle_mark_nesting++); 59 } 60 61 inline void HandleMark::pop_and_restore() { 62 HandleArea* area = _area; // help compilers with poor alias analysis 63 // Delete later chunks 64 if( _chunk->next() ) { 65 _chunk->next_chop(); 66 } 67 // Roll back arena to saved top markers 68 area->_chunk = _chunk; 69 area->_hwm = _hwm; 70 area->_max = _max; 71 NOT_PRODUCT(area->set_size_in_bytes(_size_in_bytes);) 72 debug_only(area->_handle_mark_nesting--); 73 }