src/iodbc/dlf.h

   1 /*
   2  *  dlf.h
   3  *
   4  *  $Id$
   5  *
   6  *  Dynamic Library Loader (mapping to SVR4)
   7  *
   8  *  The iODBC driver manager.
   9  *
  10  *  Copyright (C) 1995 by Ke Jin <kejin@empress.com>
  11  *
  12  *  This library is free software; you can redistribute it and/or
  13  *  modify it under the terms of the GNU Library General Public
  14  *  License as published by the Free Software Foundation; either
  15  *  version 2 of the License, or (at your option) any later version.
  16  *
  17  *  This library is distributed in the hope that it will be useful,
  18  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  20  *  Library General Public License for more details.
  21  *
  22  *  You should have received a copy of the GNU Library General Public
  23  *  License along with this library; if not, write to the Free
  24  *  Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  25  */
  26 #ifndef _DLF_H
  27 #define _DLF_H
  28 #include        "config.h"
  29
  30 #if defined(HAVE_LIBDL)
  31 #define DLDAPI_SVR4_DLFCN
  32 #elif defined(HAVE_SHL_LOAD)
  33 #define DLDAPI_HP_SHL
  34 #endif
  35
  36 #ifdef DLDAPI_SVR4_DLFCN
  37 #include        <dlfcn.h>
  38 #elif DLDAPI_AIX_LOAD
  39 #include        <dlfcn.h>
  40 #else
  41 extern void FAR *dlopen (char FAR * path, int mode);
  42 extern void FAR *dlsym (void FAR * hdll, char FAR * sym);
  43 extern char FAR *dlerror ();
  44 extern int dlclose (void FAR * hdll);
  45 #endif
  46
  47 #ifndef RTLD_LAZY
  48 #define RTLD_LAZY       1
  49 #endif
  50
  51 #define DLL_OPEN(dll)           (void*)dlopen((char*)(path), RTLD_LAZY)
  52 #define DLL_PROC(hdll, sym)     (void*)dlsym((void*)(hdll), (char*)sym)
  53 #define DLL_ERROR()             (char*)dlerror()
  54 #define DLL_CLOSE(hdll)         dlclose((void*)(hdll))
  55 #endif