65 lines
1.7 KiB
C++
Executable File
65 lines
1.7 KiB
C++
Executable File
/*
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Copyright 2025 flyinghead
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This file is part of Flycast.
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Flycast is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 2 of the License, or
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(at your option) any later version.
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Flycast is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Flycast. If not, see <https://www.gnu.org/licenses/>.
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*/
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#pragma once
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#include <windows.h>
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namespace detail
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{
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template <typename Ret, typename... Args>
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struct ProxyTraits {
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using funcType = Ret (WINAPI *)(Args...);
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};
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}
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class WinLibLoader
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{
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public:
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WinLibLoader(const char* name = nullptr) : name(name) {
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}
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~WinLibLoader() {
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if (hinst != NULL)
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FreeLibrary(hinst);
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}
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template <typename Ret, typename... Args>
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auto getFunc(const char* functionName, Ret(WINAPI * const funcPtr)(Args...))
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{
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using funcType = typename detail::ProxyTraits<Ret, Args...>::funcType;
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if (!loaded()) {
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if (!load(name))
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return static_cast<funcType>(nullptr);
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}
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return reinterpret_cast<funcType>(GetProcAddress(hinst, functionName));
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}
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bool load(const char* name)
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{
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if (hinst != NULL)
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FreeLibrary(hinst);
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hinst = LoadLibraryA(name);
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return hinst != NULL;
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}
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bool loaded() const { return hinst != NULL; }
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private:
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const char* name;
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HINSTANCE hinst = NULL;
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};
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