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// SPDX-License-Identifier: BSD-3-Clause |
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/// @file library.h |
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/// @brief Shared libraries opened at run time, for optional drivers such as CUDA's that Ernie |
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/// neither links nor requires. |
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#pragma once |
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#include <initializer_list> |
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namespace ernie { |
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/// @brief An opened shared library, closed when destroyed. |
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class SharedLibrary { |
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public: |
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/// @brief Opens the first of `names` that loads. |
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/// @return Whether one did. |
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bool Open(std::initializer_list<const char*> names); |
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~SharedLibrary(); |
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SharedLibrary() = default; |
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SharedLibrary(const SharedLibrary&) = delete; |
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SharedLibrary& operator=(const SharedLibrary&) = delete; |
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explicit operator bool() const { |
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return handle_ != nullptr; |
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} |
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/// @return The address of `name`, or null when the library has none. |
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void* Symbol(const char* name) const; |
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/// @brief Looks up `name` as a function pointer of type `F`. |
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/// @return Whether it was found. |
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template <typename F> bool Load(F& function, const char* name) const { |
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function = reinterpret_cast<F>(Symbol(name)); |
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return function != nullptr; |
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} |
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private: |
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void* handle_ = nullptr; |
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}; |
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} // namespace ernie |
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