1 /*
2  * Copyright (C) 2011 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 #ifndef ART_RUNTIME_LOCK_WORD_INL_H_
18 #define ART_RUNTIME_LOCK_WORD_INL_H_
19 
20 #include "lock_word.h"
21 #include "monitor_pool.h"
22 
23 namespace art {
24 
ThinLockOwner()25 inline uint32_t LockWord::ThinLockOwner() const {
26   DCHECK_EQ(GetState(), kThinLocked);
27   CheckReadBarrierState();
28   return (value_ >> kThinLockOwnerShift) & kThinLockOwnerMask;
29 }
30 
ThinLockCount()31 inline uint32_t LockWord::ThinLockCount() const {
32   DCHECK_EQ(GetState(), kThinLocked);
33   CheckReadBarrierState();
34   return (value_ >> kThinLockCountShift) & kThinLockCountMask;
35 }
36 
FatLockMonitor()37 inline Monitor* LockWord::FatLockMonitor() const {
38   DCHECK_EQ(GetState(), kFatLocked);
39   CheckReadBarrierState();
40   MonitorId mon_id = (value_ >> kMonitorIdShift) & kMonitorIdMask;
41   return MonitorPool::MonitorFromMonitorId(mon_id);
42 }
43 
ForwardingAddress()44 inline size_t LockWord::ForwardingAddress() const {
45   DCHECK_EQ(GetState(), kForwardingAddress);
46   return value_ << kStateSize;
47 }
48 
LockWord()49 inline LockWord::LockWord() : value_(0) {
50   DCHECK_EQ(GetState(), kUnlocked);
51 }
52 
LockWord(Monitor * mon,uint32_t rb_state)53 inline LockWord::LockWord(Monitor* mon, uint32_t rb_state)
54     : value_(mon->GetMonitorId() | (rb_state << kReadBarrierStateShift) |
55              (kStateFat << kStateShift)) {
56   DCHECK_EQ(rb_state & ~kReadBarrierStateMask, 0U);
57 #ifndef __LP64__
58   DCHECK_ALIGNED(mon, kMonitorIdAlignment);
59 #endif
60   DCHECK_EQ(FatLockMonitor(), mon);
61   DCHECK_LE(mon->GetMonitorId(), static_cast<uint32_t>(kMaxMonitorId));
62   CheckReadBarrierState();
63 }
64 
GetHashCode()65 inline int32_t LockWord::GetHashCode() const {
66   DCHECK_EQ(GetState(), kHashCode);
67   CheckReadBarrierState();
68   return (value_ >> kHashShift) & kHashMask;
69 }
70 
71 }  // namespace art
72 
73 #endif  // ART_RUNTIME_LOCK_WORD_INL_H_
74