/*+
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 * Copyright (c) 2003, 2017, Oracle and/or its affiliates. All rights reserved.+
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.+
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 *+
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 * This code is free software; you can redistribute it and/or modify it+
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 * under the terms of the GNU General Public License version 2 only, as+
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 * published by the Free Software Foundation.+
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 *+
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 * This code is distributed in the hope that it will be useful, but WITHOUT+
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or+
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License+
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 * version 2 for more details (a copy is included in the LICENSE file that+
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 * accompanied this code).+
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 *+
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 * You should have received a copy of the GNU General Public License version+
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 * 2 along with this work; if not, write to the Free Software Foundation,+
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.+
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 *+
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 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA+
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 * or visit www.oracle.com if you need additional information or have any+
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 * questions.+
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 *+
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 */+
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+
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// JvmtiTagMap+
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+
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#ifndef SHARE_VM_PRIMS_JVMTITAGMAP_HPP+
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#define SHARE_VM_PRIMS_JVMTITAGMAP_HPP+
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+
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#include "gc/shared/collectedHeap.hpp"+
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#include "gc/shared/genCollectedHeap.hpp"+
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#include "jvmtifiles/jvmti.h"+
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#include "jvmtifiles/jvmtiEnv.hpp"+
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#include "memory/allocation.hpp"+
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#include "memory/universe.hpp"+
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+
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// forward references+
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class JvmtiTagHashmap;+
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class JvmtiTagHashmapEntry;+
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class JvmtiTagHashmapEntryClosure;+
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+
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class JvmtiTagMap :  public CHeapObj<mtInternal> {+
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 private:+
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+
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  enum{+
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    max_free_entries = 4096         // maximum number of free entries per env+
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  };+
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+
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  JvmtiEnv*             _env;                       // the jvmti environment+
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  Mutex                 _lock;                      // lock for this tag map+
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  JvmtiTagHashmap*      _hashmap;                   // the hashmap+
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+
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  JvmtiTagHashmapEntry* _free_entries;              // free list for this environment+
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  int _free_entries_count;                          // number of entries on the free list+
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+
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  // create a tag map+
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  JvmtiTagMap(JvmtiEnv* env);+
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+
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  // accessors+
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  inline Mutex* lock()                      { return &_lock; }+
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  inline JvmtiEnv* env() const              { return _env; }+
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+
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  void do_weak_oops(BoolObjectClosure* is_alive, OopClosure* f);+
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+
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  // iterate over all entries in this tag map+
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  void entry_iterate(JvmtiTagHashmapEntryClosure* closure);+
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+
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 public:+
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+
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  // indicates if this tag map is locked+
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  bool is_locked()                          { return lock()->is_locked(); }+
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+
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  JvmtiTagHashmap* hashmap() { return _hashmap; }+
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+
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  // create/destroy entries+
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  JvmtiTagHashmapEntry* create_entry(oop ref, jlong tag);+
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  void destroy_entry(JvmtiTagHashmapEntry* entry);+
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+
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  // returns true if the hashmaps are empty+
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  bool is_empty();+
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+
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  // return tag for the given environment+
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  static JvmtiTagMap* tag_map_for(JvmtiEnv* env);+
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+
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  // destroy tag map+
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  ~JvmtiTagMap();+
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+
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  // set/get tag+
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  void set_tag(jobject obj, jlong tag);+
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  jlong get_tag(jobject obj);+
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+
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  // deprecated heap iteration functions+
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  void iterate_over_heap(jvmtiHeapObjectFilter object_filter,+
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                         Klass* klass,+
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                         jvmtiHeapObjectCallback heap_object_callback,+
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                         const void* user_data);+
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+
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  void iterate_over_reachable_objects(jvmtiHeapRootCallback heap_root_callback,+
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                                      jvmtiStackReferenceCallback stack_ref_callback,+
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                                      jvmtiObjectReferenceCallback object_ref_callback,+
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                                      const void* user_data);+
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+
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  void iterate_over_objects_reachable_from_object(jobject object,+
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                                                  jvmtiObjectReferenceCallback object_reference_callback,+
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                                                  const void* user_data);+
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+
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+
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  // advanced (JVMTI 1.1) heap iteration functions+
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  void iterate_through_heap(jint heap_filter,+
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                            Klass* klass,+
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                            const jvmtiHeapCallbacks* callbacks,+
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                            const void* user_data);+
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+
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  void follow_references(jint heap_filter,+
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                         Klass* klass,+
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                         jobject initial_object,+
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                         const jvmtiHeapCallbacks* callbacks,+
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                         const void* user_data);+
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+
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  // get tagged objects+
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  jvmtiError get_objects_with_tags(const jlong* tags, jint count,+
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                                   jint* count_ptr, jobject** object_result_ptr,+
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                                   jlong** tag_result_ptr);+
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+
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  static void weak_oops_do(+
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      BoolObjectClosure* is_alive, OopClosure* f) NOT_JVMTI_RETURN;+
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};+
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+
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#endif // SHARE_VM_PRIMS_JVMTITAGMAP_HPP+
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