DXCompilerLibraryLinux.cpp

/*
 *  Copyright 2024 Diligent Graphics 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.
 *
 *  In no event and under no legal theory, whether in tort (including negligence),
 *  contract, or otherwise, unless required by applicable law (such as deliberate
 *  and grossly negligent acts) or agreed to in writing, shall any Contributor be
 *  liable for any damages, including any direct, indirect, special, incidental,
 *  or consequential damages of any character arising as a result of this License or
 *  out of the use or inability to use the software (including but not limited to damages
 *  for loss of goodwill, work stoppage, computer failure or malfunction, or any and
 *  all other commercial damages or losses), even if such Contributor has been advised
 *  of the possibility of such damages.
 */

#include "DXCompilerLibrary.hpp"

#include <dlfcn.h>

namespace Diligent
{

void DXCompilerLibrary::Load()
{
#if defined(DILIGENT_USE_STATIC_DXC)
    m_Library = reinterpret_cast<void*>(0x1);
    m_DxcCreateInstance = &DxcCreateInstance;
#else
    if (!m_LibName.empty())
        m_Library = dlopen(m_LibName.c_str(), RTLD_LOCAL | RTLD_LAZY);

    if (m_Library == nullptr)
        m_Library = dlopen("libdxcompiler.so", RTLD_LOCAL | RTLD_LAZY);

    if (m_Library == nullptr)
        m_Library = dlopen("/usr/lib/dxc/libdxcompiler.so", RTLD_LOCAL | RTLD_LAZY);

    m_DxcCreateInstance = m_Library != nullptr
        ? reinterpret_cast<DxcCreateInstanceProc>(dlsym(m_Library, "DxcCreateInstance"))
        : nullptr;
#endif
}

void DXCompilerLibrary::Unload()
{
#if !defined(DILIGENT_USE_STATIC_DXC)
    if (m_Library != nullptr)
    {
        dlclose(m_Library);
        m_Library = nullptr;
    }
#endif
}

} // namespace Diligent