Thank you for the quick reply, i will create a issue on the protobuf github
site.

With best regards,

Torsten

On Wed, Nov 25, 2015 at 7:51 PM, Feng Xiao <xiaof...@google.com> wrote:

>
>
> On Wed, Nov 25, 2015 at 10:39 AM <sir.auro...@googlemail.com> wrote:
>
>> Hello,
>>
>> i'am using a copy of the master branch of protobuf v 3.0.0-beta-1.
>>
>> {
>>    DynamicMessageFactory dynamicMessageFactory;
>>    Arena myArena;
>>
>>    const Descriptor *messageDesc =
>> m_pProtoFileDescriptor->FindMessageTypeByName( "Foo" );
>>    Message *fooMessage = dynamicMessageFactory.GetPrototype( messageDesc
>> )->New(&myArena);
>> }
>>
>> What i try to do is loading a .proto file at runtime and create various
>> Message instances from it by name. I want to use a Arena cause of the
>> massive amount of message creations out of this loaded .proto Descriptor.
>>
>> Unfortunately both the DynamicMessageFactory and the Arena try to destroy
>> the created message. The Message::New method description says that the
>> ownership of the created message will be passed to the caller or in this
>> case the arena.
>>
> This does sound like a bug in DynamicMessageFactory implementation. Could
> you help file an bug for this on our github site?
>

>
>>
>> Is there another way to create Message instances out of a Descriptor at
>> runtime?
>>
> No. DynamicMessageFactory is the only way.
>
>
>> Is it intended to use the DynamicMessageFactory in common with a Arena?
>>
> Yes. Although as this feature is not used very frequently, there might be
> bugs in its implementation.
>
>
>>
>> With best regards,
>>
>> Torsten
>>
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