/// <summary>Creates an instance of T using m_valueFactory in case its not null or use reflection to create a new T()</summary>
/// <returns>An instance of Boxed.</returns>
private Boxed CreateValue()
{
Boxed boxed = null;
LazyThreadSafetyMode mode = Mode;
if (m_valueFactory != null)
{
try
{
// check for recursion
if (mode != LazyThreadSafetyMode.PublicationOnly && m_valueFactory == ALREADY_INVOKED_SENTINEL)
{
throw new InvalidOperationException(Environment.GetResourceString("Lazy_Value_RecursiveCallsToValue"));
}
Func <T> factory = m_valueFactory;
if (mode != LazyThreadSafetyMode.PublicationOnly) // only detect recursion on None and ExecutionAndPublication modes
{
m_valueFactory = ALREADY_INVOKED_SENTINEL;
}
else if (factory == ALREADY_INVOKED_SENTINEL)
{
// Another thread ----d with us and beat us to successfully invoke the factory.
return(null);
}
boxed = new Boxed(factory());
}
catch (Exception ex)
{
if (mode != LazyThreadSafetyMode.PublicationOnly) // don't cache the exception for PublicationOnly mode
{
m_boxed = new LazyInternalExceptionHolder(ex);
}
throw;
}
}
else
{
try
{
boxed = new Boxed((T)Activator.CreateInstance(typeof(T)));
}
catch (System.MissingMethodException)
{
Exception ex = new System.MissingMemberException(Environment.GetResourceString("Lazy_CreateValue_NoParameterlessCtorForT"));
if (mode != LazyThreadSafetyMode.PublicationOnly) // don't cache the exception for PublicationOnly mode
{
m_boxed = new LazyInternalExceptionHolder(ex);
}
throw ex;
}
}
return(boxed);
}
/// <summary>Creates an instance of T using m_valueFactory in case its not null or use reflection to create a new T()</summary>
/// <returns>An instance of Boxed.</returns>
private Boxed CreateValue()
{
Boxed boxed = null;
LazyThreadSafetyMode mode = Mode;
if (m_valueFactory != null)
{
try
{
// check for recursion
if (mode != LazyThreadSafetyMode.PublicationOnly && m_valueFactory == PUBLICATION_ONLY_OR_ALREADY_INITIALIZED)
{
throw new InvalidOperationException(Environment2.GetResourceString("Lazy_Value_RecursiveCallsToValue"));
}
Func <T> factory = m_valueFactory;
if (mode != LazyThreadSafetyMode.PublicationOnly) // only detect recursion on None and ExecutionAndPublication modes
{
m_valueFactory = PUBLICATION_ONLY_OR_ALREADY_INITIALIZED;
}
boxed = new Boxed(factory());
}
catch (Exception ex)
{
if (mode != LazyThreadSafetyMode.PublicationOnly) // don't cache the exception for PublicationOnly mode
{
#if PFX_LEGACY_3_5
m_boxed = new LazyInternalExceptionHolder(ex);
#else
m_boxed = new LazyInternalExceptionHolder(ex.PrepForRemoting());// copy the call stack by calling the internal method PrepForRemoting
#endif
}
throw;
}
}
else
{
try
{
boxed = new Boxed((T)Activator.CreateInstance(typeof(T)));
}
catch (System.MissingMethodException)
{
Exception ex = new System.MissingMemberException(Environment2.GetResourceString("Lazy_CreateValue_NoParameterlessCtorForT"));
if (mode != LazyThreadSafetyMode.PublicationOnly) // don't cache the exception for PublicationOnly mode
{
m_boxed = new LazyInternalExceptionHolder(ex);
}
throw ex;
}
}
return(boxed);
}
/// <summary>Creates an instance of T using m_valueFactory in case its not null or use reflection to create a new T()</summary>
/// <returns>An instance of Boxed.</returns>
private Boxed CreateValue()
{
Boxed boxed = null;
LazyThreadSafetyMode mode = Mode;
if (m_valueFactory != null)
{
try
{
// check for recursion
if (mode != LazyThreadSafetyMode.PublicationOnly && m_valueFactory == ALREADY_INVOKED_SENTINEL)
{
throw new InvalidOperationException();
}
Func <T> factory = m_valueFactory;
if (mode != LazyThreadSafetyMode.PublicationOnly) // only detect recursion on None and ExecutionAndPublication modes
{
m_valueFactory = ALREADY_INVOKED_SENTINEL;
}
else if (factory == ALREADY_INVOKED_SENTINEL)
{
// Another thread ----d with us and beat us to successfully invoke the factory.
return(null);
}
boxed = new Boxed(factory());
}
catch (Exception ex)
{
throw;
}
}
else
{
try
{
boxed = new Boxed((T)Activator.CreateInstance(typeof(T)));
}
catch (System.MissingMethodException)
{
Exception ex = new System.MissingMemberException();
throw ex;
}
}
return(boxed);
}
