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/*
* Copyright (c) 2021 Cisco and/or its affiliates.
* 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 <dlfcn.h>
#include <hicn/transport/core/io_module.h>
#include <hicn/transport/utils/log.h>
#ifdef ANDROID
#include <io_modules/udp/hicn_forwarder_module.h>
#endif
#include <deque>
namespace transport {
namespace core {
IoModule::~IoModule() {}
IoModule *IoModule::load(const char *module_name) {
#ifdef ANDROID
return new HicnForwarderModule();
#else
void *handle = 0;
IoModule *module = 0;
IoModule *(*creator)(void) = 0;
const char *error = 0;
// open module
handle = dlopen(module_name, RTLD_NOW);
if (!handle) {
if ((error = dlerror()) != 0) {
TRANSPORT_LOGE("%s", error);
}
return 0;
}
// link factory method
creator = (IoModule * (*)(void)) dlsym(handle, "create_module");
if (!creator) {
if ((error = dlerror()) != 0) {
TRANSPORT_LOGE("%s", error);
return 0;
}
}
// create object and return it
module = (*creator)();
module->handle_ = handle;
return module;
#endif
}
bool IoModule::unload(IoModule *module) {
if (!module) {
return false;
}
#ifdef ANDROID
delete module;
#else
// destroy object and close module
void *handle = module->handle_;
delete module;
dlclose(handle);
#endif
return true;
}
} // namespace core
} // namespace transport
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