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/* dlsup.c (dynamic linking support) */
/***********************************************************************
* This code is part of GLPK (GNU Linear Programming Kit).
*
* Copyright (C) 2008-2013 Andrew Makhorin, Department for Applied
* Informatics, Moscow Aviation Institute, Moscow, Russia. All rights
* reserved. E-mail: <mao@gnu.org>.
*
* GLPK is free software: you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* GLPK is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
* License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GLPK. If not, see <http://www.gnu.org/licenses/>.
***********************************************************************/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include "env.h"
/* GNU version ********************************************************/
#if defined(HAVE_LTDL)
#include <ltdl.h>
void *xdlopen(const char *module)
{ /* open dynamically linked library */
void *h = NULL;
if (lt_dlinit() != 0)
{ put_err_msg(lt_dlerror());
goto done;
}
h = lt_dlopen(module);
if (h == NULL)
{ put_err_msg(lt_dlerror());
if (lt_dlexit() != 0)
xerror("xdlopen: %s\n", lt_dlerror());
}
done: return h;
}
void *xdlsym(void *h, const char *symbol)
{ /* obtain address of symbol from dynamically linked library */
void *ptr;
xassert(h != NULL);
ptr = lt_dlsym(h, symbol);
if (ptr == NULL)
xerror("xdlsym: %s: %s\n", symbol, lt_dlerror());
return ptr;
}
void xdlclose(void *h)
{ /* close dynamically linked library */
xassert(h != NULL);
if (lt_dlclose(h) != 0)
xerror("xdlclose: %s\n", lt_dlerror());
if (lt_dlexit() != 0)
xerror("xdlclose: %s\n", lt_dlerror());
return;
}
/* POSIX version ******************************************************/
#elif defined(HAVE_DLFCN)
#include <dlfcn.h>
void *xdlopen(const char *module)
{ /* open dynamically linked library */
void *h;
h = dlopen(module, RTLD_NOW);
if (h == NULL)
put_err_msg(dlerror());
return h;
}
void *xdlsym(void *h, const char *symbol)
{ /* obtain address of symbol from dynamically linked library */
void *ptr;
xassert(h != NULL);
ptr = dlsym(h, symbol);
if (ptr == NULL)
xerror("xdlsym: %s: %s\n", symbol, dlerror());
return ptr;
}
void xdlclose(void *h)
{ /* close dynamically linked library */
xassert(h != NULL);
if (dlclose(h) != 0)
xerror("xdlclose: %s\n", dlerror());
return;
}
/* MS Windows version *************************************************/
#elif defined(__WOE__)
#include <windows.h>
void *xdlopen(const char *module)
{ /* open dynamically linked library */
void *h;
h = LoadLibrary(module);
if (h == NULL)
{ char msg[20];
sprintf(msg, "Error %d", GetLastError());
put_err_msg(msg);
}
return h;
}
void *xdlsym(void *h, const char *symbol)
{ /* obtain address of symbol from dynamically linked library */
void *ptr;
xassert(h != NULL);
ptr = GetProcAddress(h, symbol);
if (ptr == NULL)
xerror("xdlsym: %s: Error %d\n", symbol, GetLastError());
return ptr;
}
void xdlclose(void *h)
{ /* close dynamically linked library */
xassert(h != NULL);
if (!FreeLibrary(h))
xerror("xdlclose: Error %d\n", GetLastError());
return;
}
/* NULL version *******************************************************/
#else
void *xdlopen(const char *module)
{ /* open dynamically linked library */
xassert(module == module);
put_err_msg("Shared libraries not supported");
return NULL;
}
void *xdlsym(void *h, const char *symbol)
{ /* obtain address of symbol from dynamically linked library */
xassert(h != h);
xassert(symbol != symbol);
return NULL;
}
void xdlclose(void *h)
{ /* close dynamically linked library */
xassert(h != h);
return;
}
#endif
/* eof */
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