alpar@1: /* glpenv08.c (shared library support) */
alpar@1: 
alpar@1: /***********************************************************************
alpar@1: *  This code is part of GLPK (GNU Linear Programming Kit).
alpar@1: *
alpar@1: *  Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008,
alpar@1: *  2009, 2010 Andrew Makhorin, Department for Applied Informatics,
alpar@1: *  Moscow Aviation Institute, Moscow, Russia. All rights reserved.
alpar@1: *  E-mail: <mao@gnu.org>.
alpar@1: *
alpar@1: *  GLPK is free software: you can redistribute it and/or modify it
alpar@1: *  under the terms of the GNU General Public License as published by
alpar@1: *  the Free Software Foundation, either version 3 of the License, or
alpar@1: *  (at your option) any later version.
alpar@1: *
alpar@1: *  GLPK is distributed in the hope that it will be useful, but WITHOUT
alpar@1: *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
alpar@1: *  or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
alpar@1: *  License for more details.
alpar@1: *
alpar@1: *  You should have received a copy of the GNU General Public License
alpar@1: *  along with GLPK. If not, see <http://www.gnu.org/licenses/>.
alpar@1: ***********************************************************************/
alpar@1: 
alpar@1: #ifdef HAVE_CONFIG_H
alpar@1: #include <config.h>
alpar@1: #endif
alpar@1: 
alpar@1: #include "glpenv.h"
alpar@1: 
alpar@1: /* GNU version ********************************************************/
alpar@1: 
alpar@1: #if defined(HAVE_LTDL)
alpar@1: 
alpar@1: #include <ltdl.h>
alpar@1: 
alpar@1: void *xdlopen(const char *module)
alpar@1: {     void *h = NULL;
alpar@1:       if (lt_dlinit() != 0)
alpar@1:       {  lib_err_msg(lt_dlerror());
alpar@1:          goto done;
alpar@1:       }
alpar@1:       h = lt_dlopen(module);
alpar@1:       if (h == NULL)
alpar@1:       {  lib_err_msg(lt_dlerror());
alpar@1:          if (lt_dlexit() != 0)
alpar@1:             xerror("xdlopen: %s\n", lt_dlerror());
alpar@1:       }
alpar@1: done: return h;
alpar@1: }
alpar@1: 
alpar@1: void *xdlsym(void *h, const char *symbol)
alpar@1: {     void *ptr;
alpar@1:       xassert(h != NULL);
alpar@1:       ptr = lt_dlsym(h, symbol);
alpar@1:       if (ptr == NULL)
alpar@1:          xerror("xdlsym: %s: %s\n", symbol, lt_dlerror());
alpar@1:       return ptr;
alpar@1: }
alpar@1: 
alpar@1: void xdlclose(void *h)
alpar@1: {     xassert(h != NULL);
alpar@1:       if (lt_dlclose(h) != 0)
alpar@1:          xerror("xdlclose: %s\n", lt_dlerror());
alpar@1:       if (lt_dlexit() != 0)
alpar@1:          xerror("xdlclose: %s\n", lt_dlerror());
alpar@1:       return;
alpar@1: }
alpar@1: 
alpar@1: /* POSIX version ******************************************************/
alpar@1: 
alpar@1: #elif defined(HAVE_DLFCN)
alpar@1: 
alpar@1: #include <dlfcn.h>
alpar@1: 
alpar@1: void *xdlopen(const char *module)
alpar@1: {     void *h;
alpar@1:       h = dlopen(module, RTLD_NOW);
alpar@1:       if (h == NULL)
alpar@1:          lib_err_msg(dlerror());
alpar@1:       return h;
alpar@1: }
alpar@1: 
alpar@1: void *xdlsym(void *h, const char *symbol)
alpar@1: {     void *ptr;
alpar@1:       xassert(h != NULL);
alpar@1:       ptr = dlsym(h, symbol);
alpar@1:       if (ptr == NULL)
alpar@1:          xerror("xdlsym: %s: %s\n", symbol, dlerror());
alpar@1:       return ptr;
alpar@1: }
alpar@1: 
alpar@1: void xdlclose(void *h)
alpar@1: {     xassert(h != NULL);
alpar@1:       if (dlclose(h) != 0)
alpar@1:          xerror("xdlclose: %s\n", dlerror());
alpar@1:       return;
alpar@1: }
alpar@1: 
alpar@1: /* Windows version ****************************************************/
alpar@1: 
alpar@1: #elif defined(__WOE__)
alpar@1: 
alpar@1: #include <windows.h>
alpar@1: 
alpar@1: void *xdlopen(const char *module)
alpar@1: {     void *h;
alpar@1:       h = LoadLibrary(module);
alpar@1:       if (h == NULL)
alpar@1:       {  char msg[20];
alpar@1:          sprintf(msg, "Error %d", GetLastError());
alpar@1:          lib_err_msg(msg);
alpar@1:       }
alpar@1:       return h;
alpar@1: }
alpar@1: 
alpar@1: void *xdlsym(void *h, const char *symbol)
alpar@1: {     void *ptr;
alpar@1:       xassert(h != NULL);
alpar@1:       ptr = GetProcAddress(h, symbol);
alpar@1:       if (ptr == NULL)
alpar@1:          xerror("xdlsym: %s: Error %d\n", symbol, GetLastError());
alpar@1:       return ptr;
alpar@1: }
alpar@1: 
alpar@1: void xdlclose(void *h)
alpar@1: {     xassert(h != NULL);
alpar@1:       if (!FreeLibrary(h))
alpar@1:          xerror("xdlclose: Error %d\n", GetLastError());
alpar@1:       return;
alpar@1: }
alpar@1: 
alpar@1: /* NULL version *******************************************************/
alpar@1: 
alpar@1: #else
alpar@1: 
alpar@1: void *xdlopen(const char *module)
alpar@1: {     xassert(module == module);
alpar@1:       lib_err_msg("Shared libraries not supported");
alpar@1:       return NULL;
alpar@1: }
alpar@1: 
alpar@1: void *xdlsym(void *h, const char *symbol)
alpar@1: {     xassert(h != h);
alpar@1:       xassert(symbol != symbol);
alpar@1:       return NULL;
alpar@1: }
alpar@1: 
alpar@1: void xdlclose(void *h)
alpar@1: {     xassert(h != h);
alpar@1:       return;
alpar@1: }
alpar@1: 
alpar@1: #endif
alpar@1: 
alpar@1: /* eof */