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/*
* Copyright (c) 2022 Samsung Electronics Co., Ltd. All Rights Reserved
*
* 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 "DynamicLoader.h"
#include "util/Logging.h"
namespace npud
{
namespace core
{
DynamicLoader::DynamicLoader(const char *file, int flags)
: _handle(nullptr), _filepath(file), _allocSymbol("allocate"), _deallocSymbol("deallocate")
{
if (!(_handle = dlopen(_filepath.c_str(), flags)))
{
VERBOSE(DynamicLoader) << "Fail to load " << _filepath << " module: " << dlerror() << std::endl;
throw std::runtime_error("Fail to load " + _filepath + " module");
}
NpuAlloc alloc;
NpuDealloc dealloc;
alloc = reinterpret_cast<NpuAlloc>(dlsym(_handle, _allocSymbol.c_str()));
dealloc = reinterpret_cast<NpuDealloc>(dlsym(_handle, _deallocSymbol.c_str()));
if (!alloc || !dealloc)
{
VERBOSE(DynamicLoader) << "Fail to load " << _filepath << " symbol: " << dlerror() << std::endl;
dlclose(_handle);
throw std::runtime_error("Fail to load " + _filepath + " module");
}
_backend = std::shared_ptr<Backend>(alloc(), [dealloc](Backend *b) { dealloc(b); });
}
DynamicLoader::~DynamicLoader()
{
// NOTE
// The _backend shared_ptr must be explicitly deleted before
// the dynamic library handle is released.
_backend.reset();
dlclose(_handle);
}
std::shared_ptr<Backend> DynamicLoader::getInstance() { return _backend; }
} // namespace core
} // namespace npud
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