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POName mangling in an exported c++ member function to C# (Unity)
 

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  1. POName mangling in an exported c++ member function to C# (Unity)
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    <blockquote> <p><strong>Possible Duplicate:</strong><br> <a href="https://stackoverflow.com/questions/11619986/c-plugin-for-unity-entrypointnotfoundexeption">C++ plugin for Unity &ldquo;EntryPointNotFoundExeption&rdquo;</a> </p> </blockquote> <p>I understand how to prevent name mangling with extern "C" on individual functions in c++, but is there any way to prevent it when exporting member functions?</p> <p><strong>WMIWrapper.cpp</strong></p> <pre><code>namespace WMIWrapper { extern "C" { WMIWrapper::WMIWrapper() { _locator = NULL; _service = NULL; _monitors = NULL; } WMIWrapper::~WMIWrapper() { if(_service != NULL) _service-&gt;Release(); if(_locator != NULL) _locator-&gt;Release(); } void WMIWrapper::CreateCOM(wchar_t* err, int errLength) { wstringstream ERRStream (wstringstream::in | wstringstream::out); HRESULT hRes = CoInitializeEx(NULL, COINIT_MULTITHREADED); if(FAILED(hRes)) { ERRStream &lt;&lt; "Unable to launch COM: 0x" &lt;&lt; std::hex &lt;&lt; hRes &lt;&lt; endl; } hRes = CoInitializeSecurity(NULL, -1, NULL, NULL, RPC_C_AUTHN_LEVEL_CONNECT, RPC_C_IMP_LEVEL_IMPERSONATE, NULL, EOAC_NONE, 0); if(FAILED(hRes)) { ERRStream &lt;&lt; "Unable to set security level for COM: " &lt;&lt; std::hex &lt;&lt; hRes &lt;&lt; endl; } if(FAILED(hRes = CoCreateInstance(CLSID_WbemLocator, NULL, CLSCTX_ALL, IID_PPV_ARGS(&amp;_locator)))) { ERRStream &lt;&lt; "Unable to create a WbemLocator: " &lt;&lt; std::hex &lt;&lt; hRes &lt;&lt; endl; } if(ERRStream != NULL) wcscpy_s(err, errLength, ERRStream.str().c_str()); } void WMIWrapper::CreateService(wchar_t* err, int errLength) { wstringstream ERRStream (wstringstream::in | wstringstream::out); HRESULT hRes; if(_locator == NULL || FAILED(hRes = _locator-&gt;ConnectServer(L"root\\CIMV2", NULL, NULL, NULL, WBEM_FLAG_CONNECT_USE_MAX_WAIT, NULL, NULL, &amp;_service))) { ERRStream &lt;&lt; "Unable to connect to \"CIMV2\": " &lt;&lt; std::hex &lt;&lt; hRes &lt;&lt; endl; } if(ERRStream != NULL) wcscpy_s(err, errLength, ERRStream.str().c_str()); } void WMIWrapper::GetMonitors(wchar_t* err, int errLength) { HRESULT hRes; wstringstream ssMonitorDescription; if(_locator == NULL || _service == NULL || FAILED(hRes = _service-&gt;ExecQuery(L"WQL", L"SELECT * FROM Win32_DesktopMonitor", WBEM_FLAG_FORWARD_ONLY, NULL, &amp;_monitors))) { ssMonitorDescription &lt;&lt; "Unable to retrieve desktop monitors: " &lt;&lt; std::hex &lt;&lt; hRes &lt;&lt; endl; wcscpy_s(err, errLength, ssMonitorDescription.str().c_str()); return; } IWbemClassObject* clsObj = NULL; int numElems; while((hRes = _monitors-&gt;Next(WBEM_INFINITE, 1, &amp;clsObj, (ULONG*)&amp;numElems)) != WBEM_S_FALSE) { if(FAILED(hRes)) break; VARIANT vRet; VariantInit(&amp;vRet); if(SUCCEEDED(clsObj-&gt;Get(L"Description", 0, &amp;vRet, NULL, NULL)) &amp;&amp; vRet.vt == VT_BSTR) { ssMonitorDescription &lt;&lt; "Description: " &lt;&lt; vRet.bstrVal &lt;&lt; endl; VariantClear(&amp;vRet); } } clsObj-&gt;Release(); wcscpy_s(err, errLength, ssMonitorDescription.str().c_str()); } void WMIWrapper::HelloWorld(wchar_t* testString, int length) { wstring hello = L"Hello World"; wcscpy_s(testString, length, hello.c_str()); } } } </code></pre> <p><strong>WMIWrapper.h</strong></p> <pre><code>#ifndef _WMIWRAPPER_H_ #define _WMIWRAPPER_H_ #include &lt;Windows.h&gt; #include &lt;sstream&gt; #include &lt;iostream&gt; #include &lt;WbemCli.h&gt; using std::endl; using std::wstring; using std::wstringstream; #pragma comment(lib, "wbemuuid.lib") namespace WMIWrapper { extern "C" { class WMIWrapper { public: WMIWrapper(); ~WMIWrapper(); __declspec(dllexport) void CreateCOM(wchar_t*, int); __declspec(dllexport) void CreateService(wchar_t*, int); __declspec(dllexport) void GetMonitors(wchar_t*, int); __declspec(dllexport) void HelloWorld(wchar_t*, int); private: IWbemLocator* _locator; IWbemServices* _service; IEnumWbemClassObject* _monitors; }; } } #endif </code></pre> <p>Now when I want to use those functions in Unity, I need to decompile the dll to find out what my EntryPoints are for the function names. I do not want to have to do this.</p> <p>I know I got a little overzealous with with the extern "C"...</p>
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    1. COvoting to close as it has been asked repeatedly over the last few days [C++ plugin for Unity "EntryPointNotFoundExeption"](http://stackoverflow.com/questions/11619986/c-plugin-for-unity-entrypointnotfoundexeption)
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    2. COIt's the same project, not the same question.
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