EXPERIMENTAL: Support capnp 1.0

Adapt pycapnp to work with capnp 1.0.
The breaking change is that allowCancellation is removed
from the CallContext since its now defined in the schema.

TODO: Not sure how one can inject the version of capnp during
compiletime best ...

.gitignore

@@ -46,6 +46,7 @@ docs/_build
 
 capnp/lib/capnp.cpp
 capnp/lib/capnp.h
+capnp/lib/capnp_api.h
 bundled/
 example
 *.iml

buildutils/bundle.py

@@ -26,7 +26,7 @@
 #
 
 
-bundled_version = (0, 10, 3)
+bundled_version = (1, 0, 1)
 libcapnp_name = "capnproto-c++-%i.%i.%i.tar.gz" % (bundled_version)
 libcapnp_url = "https://capnproto.org/" + libcapnp_name
 

capnp/lib/capnp.pyx

@@ -1913,7 +1913,11 @@ cdef class _CallContext:
         self.thisptr.releaseParams()
 
     cpdef allow_cancellation(self):
-        self.thisptr.allowCancellation()
+        _warnings.warn(
+            "The allowCancellation method has been replaced by the allowCancellation "
+            "annotation in the in schema. The call to this method has no effect any "
+            "more."
+            )
 
     cpdef tail_call(self, _Request tailRequest):
         return _voidpromise_to_asyncio(self.thisptr.tailCall(move(deref(tailRequest.thisptr_child))))
@@ -2426,7 +2430,7 @@ cdef class _PyAsyncIoStreamProtocol(DummyBaseClass, asyncio.BufferedProtocol):
 
     # State for reading data from the transport
     cdef char* read_buffer
-    cdef size_t read_min_bytes
+    cdef int32_t read_min_bytes
     cdef size_t read_max_bytes
     cdef size_t read_already_read
     cdef PromiseFulfiller[size_t]* read_fulfiller