internal static void FreeComObject <T>(ref T obj)
where T : class
{
#if false
// When debug -> use special version, that writes debug information
ComDebug.DebugFreeComObject(ref obj);
#else
// take it to local variable
var localObj = Interlocked.Exchange(ref obj, null);
// if it is already null -> return
if (localObj == null)
{
return;
}
Marshal.ReleaseComObject(localObj);
#endif
}
public void IsOperatorRefCounterTest()
{
// operator is is NOT increment counters
var item1 = Xpcom.CreateInstance <nsISupports>(Contracts.Array);
int comCount1 = ComDebug.GetComRefCount(item1);
int rcwCount1 = ComDebug.GetRcwRefCount(item1);
bool test = item1 is nsIArray;
int comCount2 = ComDebug.GetComRefCount(item1);
int rcwCount2 = ComDebug.GetRcwRefCount(item1);
int free = Marshal.ReleaseComObject(item1);
Assert.AreEqual(0, comCount2 - comCount1);
Assert.AreEqual(0, rcwCount2 - rcwCount1);
Assert.AreEqual(0, free);
}
public void QueryInterfaceRefCounterTest()
{
var item1 = Xpcom.CreateInstance <nsISupports>(Contracts.Array);
int comCount1 = ComDebug.GetComRefCount(item1);
int rcwCount1 = ComDebug.GetRcwRefCount(item1);
var item2 = Xpcom.QueryInterface <nsIArray>(item1);
int comCount2 = ComDebug.GetComRefCount(item2);
int rcwCount2 = ComDebug.GetRcwRefCount(item2);
int free1 = Marshal.ReleaseComObject(item2);
int free2 = Marshal.ReleaseComObject(item1);
Assert.AreEqual(0, comCount2 - comCount1);
Assert.AreEqual(1, rcwCount2 - rcwCount1);
Assert.AreEqual(1, free1);
Assert.AreEqual(0, free2);
}
public void ExplicitOperatorRefCounterTest()
{
// operator explicit is NOT increment counters
var item1 = Xpcom.CreateInstance <nsISupports>(Contracts.Array);
int comCount = ComDebug.GetComRefCount(item1);
int rcwCount = ComDebug.GetRcwRefCount(item1);
nsIArray item2 = (nsIArray)item1;
int comCount1 = ComDebug.GetComRefCount(item1);
int rcwCount1 = ComDebug.GetRcwRefCount(item1);
int comCount2 = ComDebug.GetComRefCount(item2);
int rcwCount2 = ComDebug.GetRcwRefCount(item2);
int free = Marshal.ReleaseComObject(item2);
Assert.AreEqual(0, comCount2 - comCount1);
Assert.AreEqual(0, rcwCount2 - rcwCount1);
Assert.AreEqual(0, comCount2 - comCount);
Assert.AreEqual(0, rcwCount2 - rcwCount);
Assert.AreEqual(0, free);
}
