Mercurial > jdk8-mips64-public > nashorn / file comparison

comparison: src/jdk/internal/dynalink/support/CallSiteDescriptorFactory.java

src/jdk/internal/dynalink/support/CallSiteDescriptorFactory.java

changeset 963
e2497b11a021
parent 962
ac62e33a99b0
child 1205
4112748288bb
child 1231
701c1dcdf733
equal deleted inserted replaced
962:ac62e33a99b0 963:e2497b11a021
84 package jdk.internal.dynalink.support; 84 package jdk.internal.dynalink.support;
85 85
86 import java.lang.invoke.MethodHandles; 86 import java.lang.invoke.MethodHandles;
87 import java.lang.invoke.MethodHandles.Lookup; 87 import java.lang.invoke.MethodHandles.Lookup;
88 import java.lang.invoke.MethodType; 88 import java.lang.invoke.MethodType;
89 import java.lang.ref.Reference;
89 import java.lang.ref.WeakReference; 90 import java.lang.ref.WeakReference;
90 import java.util.Arrays; 91 import java.util.Arrays;
91 import java.util.Collections; 92 import java.util.Collections;
92 import java.util.List; 93 import java.util.List;
93 import java.util.StringTokenizer; 94 import java.util.StringTokenizer;
101 * a previously created, at least softly reachable one exists. It also uses several different implementations of the 102 * a previously created, at least softly reachable one exists. It also uses several different implementations of the
102 * {@link CallSiteDescriptor} internally, and chooses the most space-efficient one based on the input. 103 * {@link CallSiteDescriptor} internally, and chooses the most space-efficient one based on the input.
103 * @author Attila Szegedi 104 * @author Attila Szegedi
104 */ 105 */
105 public class CallSiteDescriptorFactory { 106 public class CallSiteDescriptorFactory {
106 private static final WeakHashMap<CallSiteDescriptor, WeakReference<CallSiteDescriptor>> publicDescs = 107 private static final WeakHashMap<CallSiteDescriptor, Reference<CallSiteDescriptor>> publicDescs =
107 new WeakHashMap<>(); 108 new WeakHashMap<>();
108 109
109 110
110 private CallSiteDescriptorFactory() { 111 private CallSiteDescriptorFactory() {
111 } 112 }
132 return new LookupCallSiteDescriptor(tokenizedName, methodType, lookup); 133 return new LookupCallSiteDescriptor(tokenizedName, methodType, lookup);
133 } 134 }
134 135
135 static CallSiteDescriptor getCanonicalPublicDescriptor(final CallSiteDescriptor desc) { 136 static CallSiteDescriptor getCanonicalPublicDescriptor(final CallSiteDescriptor desc) {
136 synchronized(publicDescs) { 137 synchronized(publicDescs) {
137 final WeakReference<CallSiteDescriptor> ref = publicDescs.get(desc); 138 final Reference<CallSiteDescriptor> ref = publicDescs.get(desc);
138 if(ref != null) { 139 if(ref != null) {
139 final CallSiteDescriptor canonical = ref.get(); 140 final CallSiteDescriptor canonical = ref.get();
140 if(canonical != null) { 141 if(canonical != null) {
141 return canonical; 142 return canonical;
142 } 143 }
143 } 144 }
144 publicDescs.put(desc, new WeakReference<>(desc)); 145 publicDescs.put(desc, createReference(desc));
145 } 146 }
146 return desc; 147 return desc;
148 }
149
150 /**
151 * Override this to use a different kind of references for the cache
152 * @param desc desc
153 * @return reference
154 */
155 protected static Reference<CallSiteDescriptor> createReference(final CallSiteDescriptor desc) {
156 return new WeakReference<>(desc);
147 } 157 }
148 158
149 private static CallSiteDescriptor createPublicCallSiteDescriptor(final String[] tokenizedName, final MethodType methodType) { 159 private static CallSiteDescriptor createPublicCallSiteDescriptor(final String[] tokenizedName, final MethodType methodType) {
150 final int l = tokenizedName.length; 160 final int l = tokenizedName.length;
151 if(l > 0 && tokenizedName[0] == "dyn") { 161 if(l > 0 && tokenizedName[0] == "dyn") {

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