1 /*

     2  * Copyright 1998-2003 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

    20  * CA 95054 USA or visit www.sun.com if you need additional information or

    21  * have any 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 }