1 /*
   2  * Copyright (c) 1998, 2010, 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 #ifndef SHARE_VM_RUNTIME_HANDLES_INLINE_HPP
  26 #define SHARE_VM_RUNTIME_HANDLES_INLINE_HPP
  27 
  28 #include "runtime/handles.hpp"
  29 #ifdef TARGET_OS_FAMILY_linux
  30 # include "thread_linux.inline.hpp"
  31 #endif
  32 #ifdef TARGET_OS_FAMILY_solaris
  33 # include "thread_solaris.inline.hpp"
  34 #endif
  35 #ifdef TARGET_OS_FAMILY_windows
  36 # include "thread_windows.inline.hpp"
  37 #endif
  38 #ifdef TARGET_OS_FAMILY_bsd
  39 # include "thread_bsd.inline.hpp"
  40 #endif
  41 
  42 // these inline functions are in a separate file to break an include cycle
  43 // between Thread and Handle
  44 
  45 inline Handle::Handle(oop obj) {
  46   if (obj == NULL) {
  47     _handle = NULL;
  48   } else {
  49     _handle = Thread::current()->handle_area()->allocate_handle(obj);
  50   }
  51 }
  52 
  53 
  54 #ifndef ASSERT
  55 inline Handle::Handle(Thread* thread, oop obj) {
  56   assert(thread == Thread::current(), "sanity check");
  57   if (obj == NULL) {
  58     _handle = NULL;
  59   } else {
  60     _handle = thread->handle_area()->allocate_handle(obj);
  61   }
  62 }
  63 #endif // ASSERT
  64 
  65 
  66 inline HandleMark::HandleMark() {
  67   initialize(Thread::current());
  68 }
  69 
  70 
  71 inline void HandleMark::push() {
  72   // This is intentionally a NOP. pop_and_restore will reset
  73   // values to the HandleMark further down the stack, typically
  74   // in JavaCalls::call_helper.
  75   debug_only(_area->_handle_mark_nesting++);
  76 }
  77 
  78 inline void HandleMark::pop_and_restore() {
  79   HandleArea* area = _area;   // help compilers with poor alias analysis
  80   // Delete later chunks
  81   if( _chunk->next() ) {
  82     _chunk->next_chop();
  83   }
  84   // Roll back arena to saved top markers
  85   area->_chunk = _chunk;
  86   area->_hwm = _hwm;
  87   area->_max = _max;
  88   NOT_PRODUCT(area->set_size_in_bytes(_size_in_bytes);)
  89   debug_only(area->_handle_mark_nesting--);
  90 }
  91 
  92 #endif // SHARE_VM_RUNTIME_HANDLES_INLINE_HPP