rstudio/src/cpp/core/system/Win32LibraryLoader.cpp at main · ssh352/rstudio · GitHub

History

106 lines (93 loc) · 2.36 KB

Raw

100

101

102

103

104

105

106

* Win32LibraryLoader.cpp

* Unless you have received this program directly from Posit Software pursuant

* to the terms of a commercial license agreement with Posit Software, then

* this program is licensed to you under the terms of version 3 of the

* GNU Affero General Public License. This program is distributed WITHOUT

* ANY EXPRESS OR IMPLIED WARRANTY, INCLUDING THOSE OF NON-INFRINGEMENT,

* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Please refer to the

* AGPL (http://www.gnu.org/licenses/agpl-3.0.txt) for more details.

#include <core/system/LibraryLoader.hpp>

#include <windows.h>

#include <shared_core/Error.hpp>

namespace rstudio {

namespace core {

namespace system {

namespace {

std::string getLastErrorMessage()

{

LPVOID lpMsgBuf;

auto lastErr = ::GetLastError();

DWORD length = ::FormatMessage(

FORMAT_MESSAGE_ALLOCATE_BUFFER |

FORMAT_MESSAGE_FROM_SYSTEM |

FORMAT_MESSAGE_IGNORE_INSERTS,

nullptr,

lastErr,

MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),

(LPTSTR) &lpMsgBuf,

0, nullptr );

if (length != 0)

{

std::string msg((LPTSTR)lpMsgBuf);

LocalFree(lpMsgBuf);

return msg;

}

else

{

return "Unknown error";

}

} // anonymous namespace

Error loadLibrary(const std::string& libPath, void** ppLib)

{

// use

*ppLib = nullptr;

*ppLib = (void*)::LoadLibraryEx(libPath.c_str(), nullptr, 0);

if (*ppLib == nullptr)

{

Error error = LAST_SYSTEM_ERROR();

error.addProperty("dlerror", libPath + " - " + getLastErrorMessage());

return error;

}

else

{

return Success();

}

Error loadSymbol(void* pLib, const std::string& name, void** ppSymbol)

{

*ppSymbol = nullptr;

*ppSymbol = (void*)::GetProcAddress((HINSTANCE)pLib, name.c_str());

if (*ppSymbol == nullptr)

{

Error error = LAST_SYSTEM_ERROR();

error.addProperty("dlerror", name + " - " + getLastErrorMessage());

return error;

}

else

{

return Success();

}

Error closeLibrary(void* pLib)

{

if (!::FreeLibrary((HMODULE)pLib))

{

Error error = LAST_SYSTEM_ERROR();

error.addProperty("dlerror", getLastErrorMessage());

return error;

}

else

{

return Success();

}

} // namespace system

} // namespace core

} // namespace rstudio

rstudio/src/cpp/core/system/Win32LibraryLoader.cpp at main · ssh352/rstudio · GitHub

Expand file tree

Breadcrumbs

Win32LibraryLoader.cpp

Latest commit

History

Breadcrumbs

Win32LibraryLoader.cpp

File metadata and controls