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add read/write lock to lexer.

This commit is contained in:
Terence Parr 2012-07-29 17:21:10 -07:00
parent 489f3d17cb
commit c0ece0bd09
1 changed files with 17 additions and 4 deletions
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21
runtime/Java/src/org/antlr/v4/runtime/atn/LexerATNSimulator.java
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@ -162,11 +162,24 @@ public class LexerATNSimulator extends ATNSimulator {
int mark = input.mark();
traceBeginMatch(input, mode);
try {
if ( decisionToDFA[mode].s0==null ) {
return matchATN(input);
DFA dfa = decisionToDFA[mode];
if ( dfa.s0==null ) {
dfa.write.lock();
try {
return matchATN(input);
}
finally {
dfa.write.unlock();
}
}
else {
return execDFA(input, decisionToDFA[mode].s0);
dfa.read.lock();
try {
return execDFA(input, dfa.s0);
}
finally {
dfa.read.unlock();
}
}
}
finally {
@ -875,7 +888,7 @@ public class LexerATNSimulator extends ATNSimulator {
public final void tracePushMode(int mode) {
if (trace) {
traceByteSlow(LexerOpCode.PushMode, (byte)mode);
traceByteSlow(LexerOpCode.PushMode, (byte) mode);
}
}