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dl.hh
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/* dl.hh - load dynamic libraries
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* Copyright 2005 Bas Wijnen <wijnen@debian.org>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef SHEVEK_DL_HH
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#define SHEVEK_DL_HH
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#include <string>
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#include "dlfcn.h"
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#include "refbase.hh"
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#include "error.hh"
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namespace
shevek
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{
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class
dl
:
public
refbase
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{
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void
*m_handle;
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public
:
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static
Glib::RefPtr <dl>
create
() {
return
Glib::RefPtr <dl> (
new
dl
()); }
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~dl
();
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void
open
(std::string
const
&
file
= std::string ());
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void
close
();
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template
<
typename
T> T &
get
(std::string
const
&name);
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protected
:
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dl
();
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};
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template
<
typename
T> T &
dl::get
(std::string
const
&name)
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{
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if
(!m_handle)
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shevek_error (
"unable to get symbol: no valid handle"
);
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union
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{
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void
*input;
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T *output;
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} hack;
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hack.input = dlsym (m_handle, name.c_str ());
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if
(!hack.input)
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shevek_error (
ostring
(
"unable to get symbol: %s"
, dlerror ()));
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return
*hack.output;
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}
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}
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#endif
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