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      1 /**************************************************************************
      2  *
      3  * Copyright 2009 VMware, Inc.
      4  * All Rights Reserved.
      5  *
      6  * Permission is hereby granted, free of charge, to any person obtaining a
      7  * copy of this software and associated documentation files (the
      8  * "Software"), to deal in the Software without restriction, including
      9  * without limitation the rights to use, copy, modify, merge, publish,
     10  * distribute, sub license, and/or sell copies of the Software, and to
     11  * permit persons to whom the Software is furnished to do so, subject to
     12  * the following conditions:
     13  *
     14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     16  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
     17  * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
     18  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
     19  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
     20  * USE OR OTHER DEALINGS IN THE SOFTWARE.
     21  *
     22  * The above copyright notice and this permission notice (including the
     23  * next paragraph) shall be included in all copies or substantial portions
     24  * of the Software.
     25  *
     26  **************************************************************************/
     27 
     28 
     29 #ifndef U_DL_H_
     30 #define U_DL_H_
     31 
     32 
     33 #include "pipe/p_config.h"
     34 
     35 
     36 #if defined(PIPE_OS_WINDOWS)
     37 #  define UTIL_DL_EXT ".dll"
     38 #  define UTIL_DL_PREFIX ""
     39 #elif defined(PIPE_OS_APPLE)
     40 #  define UTIL_DL_EXT ".dylib"
     41 #  define UTIL_DL_PREFIX "lib"
     42 #else
     43 #  define UTIL_DL_EXT ".so"
     44 #  define UTIL_DL_PREFIX "lib"
     45 #endif
     46 
     47 
     48 struct util_dl_library;
     49 
     50 
     51 typedef void (*util_dl_proc)(void);
     52 
     53 
     54 /**
     55  * Open a library dynamically.
     56  */
     57 struct util_dl_library *
     58 util_dl_open(const char *filename);
     59 
     60 
     61 /**
     62  * Lookup a function in a library.
     63  */
     64 util_dl_proc
     65 util_dl_get_proc_address(struct util_dl_library *library,
     66                          const char *procname);
     67 
     68 
     69 /**
     70  * Close a library.
     71  */
     72 void
     73 util_dl_close(struct util_dl_library *library);
     74 
     75 
     76 /**
     77  * Return most recent error message.
     78  */
     79 const char *
     80 util_dl_error(void);
     81 
     82 
     83 #endif /* U_DL_H_ */
     84