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      1 /**************************************************************************
      2  *
      3  * Copyright 2009 VMware, Inc.
      4  * Copyright 1999-2008  Brian Paul
      5  * All Rights Reserved.
      6  *
      7  * Permission is hereby granted, free of charge, to any person obtaining a
      8  * copy of this software and associated documentation files (the
      9  * "Software"), to deal in the Software without restriction, including
     10  * without limitation the rights to use, copy, modify, merge, publish,
     11  * distribute, sub license, and/or sell copies of the Software, and to
     12  * permit persons to whom the Software is furnished to do so, subject to
     13  * the following conditions:
     14  *
     15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     17  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
     18  * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
     19  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
     20  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
     21  * USE OR OTHER DEALINGS IN THE SOFTWARE.
     22  *
     23  * The above copyright notice and this permission notice (including the
     24  * next paragraph) shall be included in all copies or substantial portions
     25  * of the Software.
     26  *
     27  **************************************************************************/
     28 
     29 
     30 #include "pipe/p_config.h"
     31 #include "pipe/p_compiler.h"
     32 
     33 #if defined(PIPE_OS_UNIX)
     34 #include <dlfcn.h>
     35 #endif
     36 #if defined(PIPE_OS_WINDOWS)
     37 #include <windows.h>
     38 #endif
     39 
     40 #include "u_dl.h"
     41 #include "u_pointer.h"
     42 
     43 
     44 struct util_dl_library *
     45 util_dl_open(const char *filename)
     46 {
     47 #if defined(PIPE_OS_UNIX)
     48    return (struct util_dl_library *)dlopen(filename, RTLD_LAZY | RTLD_LOCAL);
     49 #elif defined(PIPE_OS_WINDOWS)
     50    return (struct util_dl_library *)LoadLibraryA(filename);
     51 #else
     52    return NULL;
     53 #endif
     54 }
     55 
     56 
     57 util_dl_proc
     58 util_dl_get_proc_address(struct util_dl_library *library,
     59                          const char *procname)
     60 {
     61 #if defined(PIPE_OS_UNIX)
     62    return (util_dl_proc) pointer_to_func(dlsym((void *)library, procname));
     63 #elif defined(PIPE_OS_WINDOWS)
     64    return (util_dl_proc)GetProcAddress((HMODULE)library, procname);
     65 #else
     66    return (util_dl_proc)NULL;
     67 #endif
     68 }
     69 
     70 
     71 void
     72 util_dl_close(struct util_dl_library *library)
     73 {
     74 #if defined(PIPE_OS_UNIX)
     75    dlclose((void *)library);
     76 #elif defined(PIPE_OS_WINDOWS)
     77    FreeLibrary((HMODULE)library);
     78 #else
     79    (void)library;
     80 #endif
     81 }
     82 
     83 
     84 const char *
     85 util_dl_error(void)
     86 {
     87 #if defined(PIPE_OS_UNIX)
     88    return dlerror();
     89 #elif defined(PIPE_OS_WINDOWS)
     90    return "unknown error";
     91 #else
     92    return "unknown error";
     93 #endif
     94 }
     95