70 lines
1.6 KiB
C++
70 lines
1.6 KiB
C++
// Copyright 2018 Slightech Co., Ltd. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#ifndef MYNTEYE_INTERNAL_DL_H_ // NOLINT
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#define MYNTEYE_INTERNAL_DL_H_
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#pragma once
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#include "mynteye/mynteye.h"
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#if defined(OS_WIN) && !defined(OS_MINGW) && !defined(OS_CYGWIN)
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#include <Windows.h>
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#else
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#include <dlfcn.h>
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#endif
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MYNTEYE_BEGIN_NAMESPACE
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#if defined(OS_WIN) && !defined(OS_MINGW) && !defined(OS_CYGWIN)
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using DLLIB = HMODULE;
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#else
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using DLLIB = void *;
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#endif
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// Dynamic loading
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// https://en.wikipedia.org/wiki/Dynamic_loading
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// C++ dlopen mini HOWTO
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// http://tldp.org/HOWTO/C++-dlopen/
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class MYNTEYE_API DL {
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public:
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DL();
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explicit DL(const char *filename);
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~DL();
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bool Open(const char *filename);
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bool IsOpened();
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void *Sym(const char *symbol);
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template <typename Func>
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Func *Sym(const char *symbol);
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int Close();
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const char *Error();
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private:
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DLLIB handle;
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};
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template <typename Func>
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Func *DL::Sym(const char *symbol) {
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void *f = Sym(symbol);
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return reinterpret_cast<Func *>(f);
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}
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MYNTEYE_END_NAMESPACE
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#endif // MYNTEYE_INTERNAL_DL_H_ NOLINT
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