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vmddlopen.h

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00001 /***************************************************************************
00002  *cr
00003  *cr            (C) Copyright 1995-2019 The Board of Trustees of the
00004  *cr                        University of Illinois
00005  *cr                         All Rights Reserved
00006  *cr
00007  ***************************************************************************/
00008 
00009 /***************************************************************************
00010  * RCS INFORMATION:
00011  *
00012  *      $RCSfile: vmddlopen.h,v $
00013  *      $Author: johns $        $Locker:  $             $State: Exp $
00014  *      $Revision: 1.12 $      $Date: 2019/01/17 21:21:03 $
00015  *
00016  ***************************************************************************
00017  * DESCRIPTION:
00018  *   Routines for loading dynamic link libraries and shared object files
00019  *   on various platforms, abstracting from machine dependent APIs.
00020  *
00021  * LICENSE:
00022  *   UIUC Open Source License 
00023  *   http://www.ks.uiuc.edu/Research/vmd/plugins/pluginlicense.html
00024  *
00025  ***************************************************************************/
00026 
00027 /*
00028  * vmddlopen: thin multi-platform wrapper around dlopen/LoadLibrary
00029  */
00030 
00031 #ifndef VMD_DLOPEN__
00032 
00033 #ifdef __cplusplus
00034 extern "C" {
00035 #endif
00036 
00037 /* Try to open the specified library.  All symbols must be resolved or the 
00038  * load will fail (RTLD_NOW).  
00039  */
00040 void *vmddlopen(const char *fname);
00041 
00042 /* Try to load the specified symbol using the given handle.  Returns NULL if 
00043  * the symbol cannot be loaded.
00044  */
00045 void *vmddlsym(void *h, const char *sym);
00046 
00047 /* Unload the library.  Return 0 on success, nonzero on error. 
00048  */
00049 int vmddlclose(void *h);
00050 
00051 /* Return last error from any of the above functions.  Not thread-safe on
00052  * Windows due to static buffer in our code. 
00053  */ 
00054 const char *vmddlerror(void);
00055 
00056 #ifdef __cplusplus
00057 }
00058 #endif
00059 
00060 #endif
00061 

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