1 /*
 2  * Copyright (c) 2017, 2019, 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 #include "gc/z/zLock.hpp"
25 #include "oops/oopsHierarchy.hpp"
26 #include "utilities/globalDefinitions.hpp"
27 
28 #ifndef SHARE_GC_Z_ZNMETHODDATA_HPP
29 #define SHARE_GC_Z_ZNMETHODDATA_HPP
30 
31 class nmethod;
32 template <typename T> class GrowableArray;
33 
34 class ZNMethodDataOops {
35 private:
36   const size_t _nimmediates;
37   bool         _has_non_immediates;
38 
39   static size_t header_size();
40 
41   ZNMethodDataOops(const GrowableArray<oop*>& immediates, bool has_non_immediates);
42 
43 public:
44   static ZNMethodDataOops* create(const GrowableArray<oop*>& immediates, bool has_non_immediates);
45   static void destroy(ZNMethodDataOops* oops);
46 
47   size_t immediates_count() const;
48   oop** immediates_begin() const;
49   oop** immediates_end() const;
50 
51   bool has_non_immediates() const;
52 };
53 
54 class ZNMethodData {
55 private:
56   ZReentrantLock             _lock;
57   ZNMethodDataOops* volatile _oops;
58 
59   ZNMethodData(nmethod* nm);
60 
61 public:
62   static ZNMethodData* create(nmethod* nm);
63   static void destroy(ZNMethodData* data);
64 
65   ZReentrantLock* lock();
66 
67   ZNMethodDataOops* oops() const;
68   ZNMethodDataOops* swap_oops(ZNMethodDataOops* oops);
69 };
70 
71 #endif // SHARE_GC_Z_ZNMETHODDATA_HPP