internal void SetVariantValue(int offset, object value)
{
IntPtr ptrZero = ADP.PtrZero;
bool success = false;
RuntimeHelpers.PrepareConstrainedRegions();
try
{
base.DangerousAddRef(ref success);
ptrZero = ADP.IntPtrOffset(base.DangerousGetHandle(), offset);
RuntimeHelpers.PrepareConstrainedRegions();
try
{
Marshal.GetNativeVariantForObject(value, ptrZero);
}
finally
{
NativeOledbWrapper.MemoryCopy(ADP.IntPtrOffset(ptrZero, ODB.SizeOf_Variant), ptrZero, ODB.SizeOf_Variant);
}
}
finally
{
if (success)
{
base.DangerousRelease();
}
}
}
// translate to native
internal void SetVariantValue(int offset, object value)
{
// two contigous VARIANT structures, second should be a binary copy of the first
Debug.Assert(_needToReset, "data type requires reseting and _needToReset is false");
Debug.Assert(0 == (ODB.SizeOf_Variant % 8), "unexpected VARIANT size mutiplier");
Debug.Assert(0 == offset % 8, "invalid alignment");
ValidateCheck(offset, 2 * ODB.SizeOf_Variant);
IntPtr buffer = ADP.PtrZero;
bool mustRelease = false;
RuntimeHelpers.PrepareConstrainedRegions();
try {
DangerousAddRef(ref mustRelease);
buffer = ADP.IntPtrOffset(DangerousGetHandle(), offset);
RuntimeHelpers.PrepareConstrainedRegions();
try {
// GetNativeVariantForObject must be in try block since it has no reliability contract
Marshal.GetNativeVariantForObject(value, buffer);
}
finally {
// safe to copy memory(dst,src,count), even if GetNativeVariantForObject failed
NativeOledbWrapper.MemoryCopy(ADP.IntPtrOffset(buffer, ODB.SizeOf_Variant), buffer, ODB.SizeOf_Variant);
}
}
finally {
if (mustRelease)
{
DangerousRelease();
}
}
}
