Hi Tom,
On 23.01.2013 18:16, tomason wrote:
That's interesting that the thunks are a seldom-used feature. The
documentation says that they're more efficient AND they're way easier to
use than mono_runtime_invoke. Is the latter really more popular or is
there a 3rd way that I don't know about yet?
The 3rd way revolves around calling back a delegate registered
from the managed world via p/invoke:
// C#
delegate float AddMethod(float a, float b);
class Test
{
[DllImport(...)]
public static extern
void RegisterAddCallback(AddMethod floatDelegate);
}
// C/C++
typedef float (*AddMethod)(float, float);
AddMethod managedAddMethod;
void
RegisterAddCallback(AddMethod delegate)
{
managedAddMethod = delegate;
}
static
float Add(float a, float b)
{
assert(managedAddMethod);
return managedAddMethod(a, b);
}
Since this approach is requiring quite a bit of bookkeeping,
it only makes sense to use it for a few methods (or at large scale
using some kind of code generation).
Robert
Thanks!
-Tom
On Wed, Jan 23, 2013 at 2:57 AM, Robert Jordan [via Mono] <
[email protected]> wrote:
Hi,
On 23.01.2013 06:43, tomason wrote:
Where MonoAddFunc is defined like this:
typedef float (*MonoAddFunc)(MonoObject*, float, float);
You you're testing under Windows, the typedef must be stdcall:
typedef float (__stdcall *MonoAddFunc)(MonoObject*, float, float);
A note on thunks: this is a seldom used feature, so odds are
that the code got a little bitrotten. Please file a bug if
you can rule out the stdcall issue, and I'll take a look
at it.
Robert
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