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comparison src/peers/gov/nasa/jpf/vm/JPF_java_util_concurrent_atomic_AtomicReferenceFieldUpdater.java @ 0:61d41facf527

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initial v8 import (history reset)
author Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
date Fri, 23 Jan 2015 10:14:01 -0800
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1 /*
2 * Copyright (C) 2014, United States Government, as represented by the
3 * Administrator of the National Aeronautics and Space Administration.
4 * All rights reserved.
5 *
6 * The Java Pathfinder core (jpf-core) platform is licensed under the
7 * Apache License, Version 2.0 (the "License"); you may not use this file except
8 * in compliance with the License. You may obtain a copy of the License at
9 *
10 * http://www.apache.org/licenses/LICENSE-2.0.
11 *
12 * Unless required by applicable law or agreed to in writing, software
13 * distributed under the License is distributed on an "AS IS" BASIS,
14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 * See the License for the specific language governing permissions and
16 * limitations under the License.
17 */
18
19 package gov.nasa.jpf.vm;
20
21 import gov.nasa.jpf.annotation.MJI;
22
23
24 /**
25 * a full peer for the AtomicReferenceFieldUpdater
26 */
27 public class JPF_java_util_concurrent_atomic_AtomicReferenceFieldUpdater extends AtomicFieldUpdater {
28
29 @MJI
30 public void $init__Ljava_lang_Class_2Ljava_lang_Class_2Ljava_lang_String_2__V (MJIEnv env, int objRef,
31 int tClsObjRef, int fClsObjRef, int fNameRef) {
32
33 // direct Object subclass, so we don't have to call a super ctor
34
35 ClassInfo ci = env.getReferredClassInfo(tClsObjRef);
36 String fname = env.getStringObject(fNameRef);
37 FieldInfo fi = ci.getInstanceField(fname);
38
39 ClassInfo fci = fi.getTypeClassInfo();
40
41 ClassInfo fciCheck = env.getReferredClassInfo( fClsObjRef);
42 if (!fci.isInstanceOf(fciCheck)) {
43 // that's also just an approximation, but we need to check
44 env.throwException("java.lang.RuntimeException", "wrong field type");
45 }
46
47 int fidx = fi.getFieldIndex();
48 env.setIntField(objRef, "fieldId", fidx);
49 }
50
51 @MJI
52 public boolean compareAndSet__Ljava_lang_Object_2Ljava_lang_Object_2Ljava_lang_Object_2__Z
53 (MJIEnv env, int objRef, int tRef, int fExpect, int fUpdate){
54
55 if (tRef == MJIEnv.NULL){
56 env.throwException("java.lang.NullPointerException", "AtomicFieldUpdater called on null object");
57 return false;
58 }
59
60 ThreadInfo ti = env.getThreadInfo();
61 ElementInfo ei = ti.getModifiableElementInfo(tRef);
62 FieldInfo fi = getFieldInfo( ti.getElementInfo(objRef), ei);
63
64 if (reschedulesAccess(ti, ei, fi)){
65 env.repeatInvocation();
66 return false;
67 }
68
69 int v = ei.getReferenceField(fi);
70 if (v == fExpect) {
71 ei.setReferenceField(fi, fUpdate);
72 return true;
73 } else {
74 return false;
75 }
76 }
77
78 @MJI
79 public boolean weakCompareAndSet__Ljava_lang_Object_2Ljava_lang_Object_2Ljava_lang_Object_2__Z
80 (MJIEnv env, int objRef, int tRef, int fExpect, int fUpdate){
81 return(compareAndSet__Ljava_lang_Object_2Ljava_lang_Object_2Ljava_lang_Object_2__Z(env, objRef, tRef, fExpect, fUpdate));
82 }
83
84 @MJI
85 public void set__Ljava_lang_Object_2Ljava_lang_Object_2__V (MJIEnv env, int objRef, int tRef, int fNewValue){
86
87 if (tRef == MJIEnv.NULL){
88 env.throwException("java.lang.NullPointerException", "AtomicFieldUpdater called on null object");
89 return;
90 }
91
92 ThreadInfo ti = env.getThreadInfo();
93 ElementInfo ei = ti.getModifiableElementInfo(tRef);
94 FieldInfo fi = getFieldInfo( ti.getElementInfo(objRef), ei);
95
96 if (reschedulesAccess(ti, ei, fi)){
97 env.repeatInvocation();
98 return;
99 }
100
101 ei.setReferenceField(fi, fNewValue);
102 }
103
104 @MJI
105 public void lazySet__Ljava_lang_Object_2Ljava_lang_Object_2__V (MJIEnv env, int objRef, int tRef, int fNewValue){
106 set__Ljava_lang_Object_2Ljava_lang_Object_2__V(env, objRef, tRef, fNewValue);
107 }
108
109 @MJI
110 public int get__Ljava_lang_Object_2__Ljava_lang_Object_2 (MJIEnv env, int objRef, int tRef){
111 if (tRef == MJIEnv.NULL){
112 env.throwException("java.lang.NullPointerException", "AtomicFieldUpdater called on null object");
113 return MJIEnv.NULL;
114 }
115
116 ThreadInfo ti = env.getThreadInfo();
117 ElementInfo ei = ti.getElementInfo(tRef);
118 FieldInfo fi = getFieldInfo( ti.getElementInfo(objRef), ei);
119
120 if (reschedulesAccess(ti, ei, fi)){
121 env.repeatInvocation();
122 return MJIEnv.NULL;
123 }
124
125 return ei.getReferenceField(fi);
126 }
127
128 @MJI
129 public int getAndSet__Ljava_lang_Object_2Ljava_lang_Object_2__Ljava_lang_Object_2 (MJIEnv env, int objRef, int tRef, int fNewValue){
130 if (tRef == MJIEnv.NULL){
131 env.throwException("java.lang.NullPointerException", "AtomicFieldUpdater called on null object");
132 return MJIEnv.NULL;
133 }
134
135 ThreadInfo ti = env.getThreadInfo();
136 ElementInfo ei = ti.getElementInfo(tRef);
137 FieldInfo fi = getFieldInfo( ti.getElementInfo(objRef), ei);
138
139 if (reschedulesAccess(ti, ei, fi)){
140 env.repeatInvocation();
141 return MJIEnv.NULL;
142 }
143
144 int result = ei.getReferenceField(fi);
145 ei.setReferenceField(fi, fNewValue);
146
147 return result;
148 }
149 }