src/dawn/common/DynamicLib.h

// Copyright 2017 The Dawn & Tint Authors
//
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// modification, are permitted provided that the following conditions are met:
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// 1. Redistributions of source code must retain the above copyright notice, this
//    list of conditions and the following disclaimer.
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// 2. Redistributions in binary form must reproduce the above copyright notice,
//    this list of conditions and the following disclaimer in the documentation
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#ifndef SRC_DAWN_COMMON_DYNAMICLIB_H_
#define SRC_DAWN_COMMON_DYNAMICLIB_H_

#include <string>
#include <type_traits>

#include "dawn/common/Assert.h"

namespace dawn {

class DynamicLib {
  public:
    DynamicLib() = default;
    ~DynamicLib();

    DynamicLib(const DynamicLib&) = delete;
    DynamicLib& operator=(const DynamicLib&) = delete;

    DynamicLib(DynamicLib&& other);
    DynamicLib& operator=(DynamicLib&& other);

    bool Valid() const;

    bool Open(const std::string& filename, std::string* error = nullptr);
    void Close();

    void* GetProc(const std::string& procName, std::string* error = nullptr) const;

    template <typename T>
    bool GetProc(T** proc, const std::string& procName, std::string* error = nullptr) const {
        DAWN_ASSERT(proc != nullptr);
        static_assert(std::is_function<T>::value);

        *proc = reinterpret_cast<T*>(GetProc(procName, error));
        return *proc != nullptr;
    }

  private:
    void* mHandle = nullptr;
};

}  // namespace dawn

#endif  // SRC_DAWN_COMMON_DYNAMICLIB_H_