rstudio/src/cpp/core/system/Win32RuntimeLibrary.cpp at master · pearsonca/rstudio · GitHub

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* Win32RuntimeLibrary.cpp

* Unless you have received this program directly from RStudio pursuant

* to the terms of a commercial license agreement with RStudio, 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/Win32RuntimeLibrary.hpp>

#include <boost/noncopyable.hpp>

#include <shared_core/Error.hpp>

#include <core/Log.hpp>

#include <core/system/LibraryLoader.hpp>

#define RS_LOAD_SYMBOL(__NAME__) \

do \

{ \

Error error = system::loadSymbol(pLib_, #__NAME__, (void**) &__NAME__); \

if (error) \

LOG_ERROR(error); \

} while (0)

namespace rstudio {

namespace core {

namespace runtime {

namespace {

namespace defaults {

int s_zero = 0;

int* _errno() { return &s_zero; }

} // namespace defaults

// helper class for RAII lifetime of library handle

class Library : boost::noncopyable

{

public:

Library()

: pLib_(nullptr),

_errno(defaults::_errno)

{

Error error = core::system::loadLibrary("msvcrt.dll", &pLib_);

if (error)

{

LOG_ERROR(error);

return;

}

RS_LOAD_SYMBOL(_errno);

}

int* (*_errno)(void);

~Library()

{

try

{

if (pLib_ != nullptr)

{

Error error = core::system::closeLibrary(pLib_);

if (error)

LOG_ERROR(error);

}

CATCH_UNEXPECTED_EXCEPTION

}

private:

void* pLib_;

};

Library& library()

{

static Library instance;

return instance;

}

} // end anonymous namespace

int errorNumber()

{

return *(library()._errno());

}

} // end namespace runtime

} // end namespace core

} // end namespace rstudio

rstudio/src/cpp/core/system/Win32RuntimeLibrary.cpp at master · pearsonca/rstudio · GitHub

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