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1 /*
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2 * Copyright 1998-2003 Sun Microsystems, Inc. All Rights Reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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20 * CA 95054 USA or visit www.sun.com if you need additional information or
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21 * have any questions.
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22 *
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23 */
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24
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25 // these inline functions are in a separate file to break an include cycle
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26 // between Thread and Handle
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27
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28 inline Handle::Handle(oop obj) {
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29 if (obj == NULL) {
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30 _handle = NULL;
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31 } else {
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32 _handle = Thread::current()->handle_area()->allocate_handle(obj);
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33 }
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34 }
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35
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36
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37 #ifndef ASSERT
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38 inline Handle::Handle(Thread* thread, oop obj) {
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39 assert(thread == Thread::current(), "sanity check");
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40 if (obj == NULL) {
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41 _handle = NULL;
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42 } else {
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43 _handle = thread->handle_area()->allocate_handle(obj);
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44 }
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45 }
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46 #endif // ASSERT
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47
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48
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49 inline HandleMark::HandleMark() {
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50 initialize(Thread::current());
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51 }
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52
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53
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54 inline void HandleMark::push() {
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55 // This is intentionally a NOP. pop_and_restore will reset
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56 // values to the HandleMark further down the stack, typically
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57 // in JavaCalls::call_helper.
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58 debug_only(_area->_handle_mark_nesting++);
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59 }
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60
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61 inline void HandleMark::pop_and_restore() {
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62 HandleArea* area = _area; // help compilers with poor alias analysis
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63 // Delete later chunks
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64 if( _chunk->next() ) {
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65 _chunk->next_chop();
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66 }
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67 // Roll back arena to saved top markers
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68 area->_chunk = _chunk;
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69 area->_hwm = _hwm;
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70 area->_max = _max;
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71 NOT_PRODUCT(area->set_size_in_bytes(_size_in_bytes);)
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72 debug_only(area->_handle_mark_nesting--);
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73 }
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