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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 *
util_dl_open(const char * filename)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
util_dl_get_proc_address(struct util_dl_library * library,const char * procname)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
util_dl_close(struct util_dl_library * library)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 *
util_dl_error(void)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