These types come from the CFNetwork.framework, but for some reason they were bound inside CoreServices many years ago.
This resolves a potential issue where we might end up linking with the
CoreServices framework instead of CFNetwork framework (because we use the
namespace of types to determine which framework they belong to).
The FSEventStreamCreate method takes a pointer to a structure with context information,
which contains a user-defined pointer value in addition to a few callbacks. Previously
we were passing the GCHandle as a pointer to this structure, which is obviously quite
wrong (as evidenced by a native crash when calling FSEventStreamCreate).
Changes:
* Modify the code to provide the expected context structure instead with the GCHandle
as a field in that structure.
* Add a release callback to the context structure to release the GCHandle.
* This avoids the need for storing the GCHandle as a field in the FSEventStream instance.
* It also avoids also the need for overriding Dispose to release said GCHandle.
* Modify the callback code to use the [UnmanagedCallersOnly] attribute for .NET
(ref: #10470).
This was a regression introduced in 8c99bdc9ad.
Fixes https://github.com/xamarin/xamarin-macios/issues/13325.
`Create` methods give ownership of the object, so in this case, owns=true. Prevents leak of CFHTTPAuthentication
Co-Authored-By: Rolf Bjarne Kvinge <rolf@xamarin.com>
Co-Authored-By: Manuel de la Pena <mandel@microsoft.com>
Rolf Bjarne Kvinge
Marius Ungureanu
Timothy Risi