| // Copyright 2021 Google LLC |
| // |
| // 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. |
| |
| #include "handler.hpp" |
| |
| #include <blobs-ipmid/blobs.hpp> |
| |
| #include <memory> |
| |
| // Extern "C" is used due to the usage of dlopen() for loading IPMI handlers |
| // and IPMI blob handlers. This happens in two steps: |
| // |
| // 1) ipmid loads all libraries in /usr/lib/ipmid-providers from its |
| // loadLibraries() function using dlopen(). |
| // 2) The blobs library, libblobcmds.so, loads all libraries in |
| // /usr/lib/blobs-ipmid from its loadLibraries() function. It uses dlsym() |
| // to locate the createHandler function by its un-mangled name |
| // "createHandler". Using extern "C" prevents its name from being mangled |
| // into, for example, "_Z13createHandlerv". |
| |
| extern "C" std::unique_ptr<blobs::GenericBlobInterface> createHandler() |
| { |
| return std::make_unique<blobs::MetricBlobHandler>(); |
| } |