private static RefCountHolder getInstance(
@NotNull PsiFile file, @NotNull ProgressIndicator indicator, boolean acquire) {
HolderReference ref = file.getUserData(REF_COUNT_HOLDER_IN_FILE_KEY);
RefCountHolder holder = com.intellij.reference.SoftReference.dereference(ref);
if (holder == null && acquire) {
holder = new RefCountHolder(file);
HolderReference newRef = new HolderReference(holder);
while (true) {
boolean replaced =
((UserDataHolderEx) file).replace(REF_COUNT_HOLDER_IN_FILE_KEY, ref, newRef);
if (replaced) {
ref = newRef;
break;
}
ref = file.getUserData(REF_COUNT_HOLDER_IN_FILE_KEY);
RefCountHolder newHolder = com.intellij.reference.SoftReference.dereference(ref);
if (newHolder != null) {
holder = newHolder;
break;
}
}
}
if (ref != null) {
if (acquire) {
ref.acquire(indicator);
} else {
ref.release(indicator);
}
}
return holder;
}