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Use atomic operations for accessing this global counter. 

llvm-svn: 74294
This commit is contained in:
Owen Anderson 2009-06-26 18:09:03 +00:00
parent 5960e6d974
commit 4a03279231
1 changed files with 6 additions and 3 deletions
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9
llvm/lib/Support/Annotation.cpp
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@ -68,9 +68,12 @@ AnnotationID AnnotationManager::getID(const char *Name) { // Name -> ID
if (I == E) {
sys::SmartScopedWriter<true> Writer(&*AnnotationsLock);
I = IDMap->find(Name);
if (I == IDMap->end())
(*IDMap)[Name] = IDCounter++; // Add a new element
return AnnotationID(IDCounter-1);
if (I == IDMap->end()) {
unsigned newCount = sys::AtomicIncrement(&IDCounter);
(*IDMap)[Name] = newCount-1; // Add a new element
return AnnotationID(newCount-1);
} else
return AnnotationID(I->second);
}
return AnnotationID(I->second);
}