private FixedFormatInfoPatternParser <T> EnsureFixedFormatInitialized <T>(ref FixedFormatInfoPatternParser <T> field,
Func <IPatternParser <T> > patternParserFactory)
{
if (field == null)
{
field = new FixedFormatInfoPatternParser <T>(patternParserFactory(), this);
}
return(field);
}
private FixedFormatInfoPatternParser <T> EnsureFixedFormatInitialized <T>(ref FixedFormatInfoPatternParser <T>?field,
Func <IPatternParser <T> > patternParserFactory)
{
lock (fieldLock)
{
if (field != null)
{
return(field);
}
}
// Construct the cache outside the lock to avoid possible deadlocks. The locally constructed
// version is ignored if another thread has set the field in-between: this returns a consistent result,
// but can occasionally perform redundant work.
var localConstruction = new FixedFormatInfoPatternParser <T>(patternParserFactory(), this);
lock (fieldLock)
{
if (field is null)
{
field = localConstruction;
}
return(field !);
}
}
