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9921dd6c77
- Replaces RAII handling of DLLs with global function pointers. (We don't unload the dll this way, but that seems unnecessary anyway). - Simplifies code by just needing to call an init function, but not needing to pass around an object holding the function pointers. - Adds a templated dll loader that takes the dll and a list of name/pointer pairs to load the dll and set the pointers in one shot.
35 lines
1.0 KiB
C++
35 lines
1.0 KiB
C++
#pragma once
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#include <windows.h>
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#include "exception.hpp"
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#include <llarp/util/str.hpp>
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namespace llarp::win32
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{
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namespace detail
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{
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HMODULE
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load_dll(const std::string& dll);
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template <typename Func, typename... More>
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void
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load_funcs(HMODULE handle, const std::string& name, Func*& f, More&&... more)
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{
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if (auto ptr = GetProcAddress(handle, name.c_str()))
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f = reinterpret_cast<Func*>(ptr);
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else
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throw win32::error{fmt::format("function '{}' not found", name)};
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if constexpr (sizeof...(More) > 0)
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load_funcs(handle, std::forward<More>(more)...);
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}
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} // namespace detail
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// Loads a DLL and extracts function pointers from it. Takes the dll name and pairs of
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// name/function pointer arguments. Throws on failure.
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template <typename Func, typename... More>
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void
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load_dll_functions(const std::string& dll, const std::string& fname, Func*& f, More&&... funcs)
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{
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detail::load_funcs(detail::load_dll(dll), fname, f, std::forward<More>(funcs)...);
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}
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} // namespace llarp::win32
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