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hotspot/src/share/vm/runtime/handles.inline.hpp

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+/*
+ * Copyright 1998-2003 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.
+ *
+ */
+
+// these inline functions are in a separate file to break an include cycle
+// between Thread and Handle
+
+inline Handle::Handle(oop obj) {
+  if (obj == NULL) {
+    _handle = NULL;
+  } else {
+    _handle = Thread::current()->handle_area()->allocate_handle(obj);
+  }
+}
+
+
+#ifndef ASSERT
+inline Handle::Handle(Thread* thread, oop obj) {
+  assert(thread == Thread::current(), "sanity check");
+  if (obj == NULL) {
+    _handle = NULL;
+  } else {
+    _handle = thread->handle_area()->allocate_handle(obj);
+  }
+}
+#endif // ASSERT
+
+
+inline HandleMark::HandleMark() {
+  initialize(Thread::current());
+}
+
+
+inline void HandleMark::push() {
+  // This is intentionally a NOP. pop_and_restore will reset
+  // values to the HandleMark further down the stack, typically
+  // in JavaCalls::call_helper.
+  debug_only(_area->_handle_mark_nesting++);
+}
+
+inline void HandleMark::pop_and_restore() {
+  HandleArea* area = _area;   // help compilers with poor alias analysis
+  // Delete later chunks
+  if( _chunk->next() ) {
+    _chunk->next_chop();
+  }
+  // Roll back arena to saved top markers
+  area->_chunk = _chunk;
+  area->_hwm = _hwm;
+  area->_max = _max;
+  NOT_PRODUCT(area->set_size_in_bytes(_size_in_bytes);)
+  debug_only(area->_handle_mark_nesting--);
+}