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rstudio/src/cpp/core/system/PosixLibraryLoader.cpp at master · pearsonca/rstudio · GitHub
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core
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PosixLibraryLoader.cpp
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rstudio
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src
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cpp
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core
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system
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PosixLibraryLoader.cpp
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/*
* PosixLibraryLoader.cpp
*
* Copyright (C) 2009-19 by RStudio, PBC
*
* 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/LibraryLoader.hpp
>
#
include
<
dlfcn.h
>
#
include
<
shared_core/Error.hpp
>
namespace
rstudio
{
namespace
core
{
namespace
system
{
namespace
{
void
addLastDLErrorMessage
(Error* pError)
{
const
char
* msg = ::
dlerror
();
if
(msg !=
nullptr
)
pError->
addProperty
(
"
dlerror
"
,
std::string
(msg));
}
}
//
anonymous namespace
Error
loadLibrary
(
const
std::string& libPath,
void
** ppLib)
{
*ppLib =
nullptr
;
*ppLib = ::
dlopen
(libPath.
c_str
(),
RTLD_NOW
);
if
(*ppLib ==
nullptr
)
{
Error error =
systemError
(
boost::system::errc::no_such_file_or_directory,
ERROR_LOCATION
);
error.
addProperty
(
"
lib-path
"
, libPath);
addLastDLErrorMessage
(&error);
return
error;
}
else
{
return
Success
();
}
}
Error
loadSymbol
(
void
* pLib,
const
std::string& name,
void
** ppSymbol)
{
*ppSymbol =
nullptr
;
*ppSymbol = ::
dlsym
(pLib, name.
c_str
());
if
(*ppSymbol ==
nullptr
)
{
Error error =
systemError
(boost::system::errc::not_supported,
ERROR_LOCATION
);
error.
addProperty
(
"
symbol
"
, name);
addLastDLErrorMessage
(&error);
return
error;
}
else
{
return
Success
();
}
}
Error
closeLibrary
(
void
* pLib)
{
if
(::
dlclose
(pLib) !=
0
)
{
Error error =
systemError
(
boost::system::errc::no_such_file_or_directory,
ERROR_LOCATION
);
addLastDLErrorMessage
(&error);
return
error;
}
else
{
return
Success
();
}
}
}
//
namespace system
}
//
namespace core
}
//
namespace rstudio
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