public static void RefCountTest()
{
Runtime.Runtime.Py_Initialize();
using var op = Runtime.Runtime.PyString_FromString("FooBar");
// New object RefCount should be one
Assert.AreEqual(1, Runtime.Runtime.Refcount32(op.BorrowOrThrow()));
// Checking refcount didn't change refcount
Assert.AreEqual(1, Runtime.Runtime.Refcount32(op.Borrow()));
// Borrowing a reference doesn't increase refcount
BorrowedReference p = op.Borrow();
Assert.AreEqual(1, Runtime.Runtime.Refcount32(p));
// Py_IncRef/Py_DecRef increase and decrease RefCount
Runtime.Runtime.Py_IncRef(op.Borrow());
Assert.AreEqual(2, Runtime.Runtime.Refcount32(p));
Runtime.Runtime.Py_DecRef(StolenReference.DangerousFromPointer(op.DangerousGetAddress()));
Assert.AreEqual(1, Runtime.Runtime.Refcount32(p));
// XIncref/XDecref increase and decrease RefCount
#pragma warning disable CS0618 // Type or member is obsolete. We are testing corresponding members
Runtime.Runtime.XIncref(p);
Assert.AreEqual(2, Runtime.Runtime.Refcount32(p));
Runtime.Runtime.XDecref(op.Steal());
Assert.AreEqual(1, Runtime.Runtime.Refcount32(p));
#pragma warning restore CS0618 // Type or member is obsolete
op.Dispose();
Runtime.Runtime.Py_Finalize();
}
[MethodImpl(MethodImplOptions.NoInlining | MethodImplOptions.NoOptimization)] // ensure lack of references to s1 and s2
private static IntPtr CreateStringGarbage()
{
PyString s1 = new PyString("test_string");
// s2 steal a reference from s1
PyString s2 = new PyString(StolenReference.DangerousFromPointer(s1.Handle));
return(s1.Handle);
}
[MethodImpl(MethodImplOptions.NoInlining | MethodImplOptions.NoOptimization)] // ensure lack of references to s1 and s2
private static IntPtr CreateStringGarbage()
{
PyString s1 = new PyString("test_string");
// s2 steal a reference from s1
IntPtr address = s1.Reference.DangerousGetAddress();
PyString s2 = new (StolenReference.DangerousFromPointer(address));
return(address);
}
public PyObject TryEncode(object value)
{
if (value == null)
{
return(null);
}
var tupleType = value.GetType();
if (tupleType == typeof(object))
{
return(null);
}
if (!this.CanEncode(tupleType))
{
return(null);
}
if (tupleType == typeof(TTuple))
{
return(new PyTuple());
}
long fieldCount = tupleType.GetGenericArguments().Length;
var tuple = Runtime.PyTuple_New(fieldCount);
Exceptions.ErrorCheck(tuple);
int fieldIndex = 0;
foreach (FieldInfo field in tupleType.GetFields())
{
var item = field.GetValue(value);
IntPtr pyItem = Converter.ToPython(item, field.FieldType);
Runtime.PyTuple_SetItem(tuple, fieldIndex, pyItem);
fieldIndex++;
}
return(new PyTuple(StolenReference.DangerousFromPointer(tuple)));
}