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# Copyright 2018 gRPC authors.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
cimport cpython
# TODO(https://github.com/grpc/grpc/issues/15662): Reform this.
cdef void* _copy_pointer(void* pointer):
return pointer
# TODO(https://github.com/grpc/grpc/issues/15662): Reform this.
cdef void _destroy_pointer(void* pointer):
pass
cdef int _compare_pointer(void* first_pointer, void* second_pointer):
if first_pointer < second_pointer:
return -1
elif first_pointer > second_pointer:
return 1
else:
return 0
cdef class _GrpcArgWrapper:
cdef grpc_arg arg
cdef tuple _wrap_grpc_arg(grpc_arg arg):
wrapped = _GrpcArgWrapper()
wrapped.arg = arg
return ("grpc.python._cygrpc._GrpcArgWrapper", wrapped)
cdef grpc_arg _unwrap_grpc_arg(tuple wrapped_arg):
cdef _GrpcArgWrapper wrapped = wrapped_arg[1]
return wrapped.arg
cdef class _ChannelArg:
cdef void c(self, argument, grpc_arg_pointer_vtable *vtable, references) except *:
key, value = argument
cdef bytes encoded_key = _encode(key)
if encoded_key is not key:
references.append(encoded_key)
self.c_argument.key = encoded_key
if isinstance(value, int):
self.c_argument.type = GRPC_ARG_INTEGER
self.c_argument.value.integer = value
elif isinstance(value, (bytes, str, unicode,)):
self.c_argument.type = GRPC_ARG_STRING
encoded_value = _encode(value)
if encoded_value is not value:
references.append(encoded_value)
self.c_argument.value.string = encoded_value
elif isinstance(value, _GrpcArgWrapper):
self.c_argument = (<_GrpcArgWrapper>value).arg
elif hasattr(value, '__int__'):
# Pointer objects must override __int__() to return
# the underlying C address (Python ints are word size). The
# lifecycle of the pointer is fixed to the lifecycle of the
# python object wrapping it.
self.c_argument.type = GRPC_ARG_POINTER
self.c_argument.value.pointer.vtable = vtable
self.c_argument.value.pointer.address = <void*>(<intptr_t>int(value))
else:
raise TypeError(
'Expected int, bytes, or behavior, got {}'.format(type(value)))
cdef class _ChannelArgs:
def __cinit__(self, arguments):
self._arguments = () if arguments is None else tuple(arguments)
self._channel_args = []
self._references = []
self._c_arguments.arguments = NULL
cdef void _c(self, grpc_arg_pointer_vtable *vtable) except *:
self._c_arguments.arguments_length = len(self._arguments)
if self._c_arguments.arguments_length != 0:
self._c_arguments.arguments = <grpc_arg *>gpr_malloc(
self._c_arguments.arguments_length * sizeof(grpc_arg))
for index, argument in enumerate(self._arguments):
channel_arg = _ChannelArg()
channel_arg.c(argument, vtable, self._references)
self._c_arguments.arguments[index] = channel_arg.c_argument
self._channel_args.append(channel_arg)
cdef grpc_channel_args *c_args(self) except *:
return &self._c_arguments
def __dealloc__(self):
if self._c_arguments.arguments != NULL:
gpr_free(self._c_arguments.arguments)
@staticmethod
cdef _ChannelArgs from_args(object arguments, grpc_arg_pointer_vtable * vtable):
cdef _ChannelArgs channel_args = _ChannelArgs(arguments)
channel_args._c(vtable)
return channel_args
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