1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
|
/*
* The MIT License
*
* Copyright (C) 2016-2017 Alexander Saprykin <saprykin.spb@gmail.com>
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* 'Software'), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include "perror.h"
#include "pfile.h"
#include "plibraryloader.h"
#include "pmem.h"
#include "pstring.h"
#include <be/kernel/image.h>
typedef image_id plibrary_handle;
struct PLibraryLoader_ {
plibrary_handle handle;
status_t last_status;
};
static void pp_library_loader_clean_handle (plibrary_handle handle);
static void
pp_library_loader_clean_handle (plibrary_handle handle)
{
if (P_UNLIKELY (unload_add_on (handle) != B_OK))
P_ERROR ("PLibraryLoader::pp_library_loader_clean_handle: unload_add_on() failed");
}
P_LIB_API PLibraryLoader *
p_library_loader_new (const pchar *path)
{
PLibraryLoader *loader = NULL;
plibrary_handle handle;
if (!p_file_is_exists (path))
return NULL;
if (P_UNLIKELY ((handle = load_add_on (path)) == B_ERROR)) {
P_ERROR ("PLibraryLoader::p_library_loader_new: load_add_on() failed");
return NULL;
}
if (P_UNLIKELY ((loader = p_malloc0 (sizeof (PLibraryLoader))) == NULL)) {
P_ERROR ("PLibraryLoader::p_library_loader_new: failed to allocate memory");
pp_library_loader_clean_handle (handle);
return NULL;
}
loader->handle = handle;
loader->last_status = B_OK;
return loader;
}
P_LIB_API PFuncAddr
p_library_loader_get_symbol (PLibraryLoader *loader, const pchar *sym)
{
ppointer location = NULL;
status_t status;
if (P_UNLIKELY (loader == NULL || sym == NULL))
return NULL;
if (P_UNLIKELY ((status = get_image_symbol (loader->handle,
(pchar *) sym,
B_SYMBOL_TYPE_ANY,
&location)) != B_OK)) {
P_ERROR ("PLibraryLoader::p_library_loader_get_symbol: get_image_symbol() failed");
loader->last_status = status;
return NULL;
}
loader->last_status = B_OK;
return (PFuncAddr) location;
}
P_LIB_API void
p_library_loader_free (PLibraryLoader *loader)
{
if (P_UNLIKELY (loader == NULL))
return;
pp_library_loader_clean_handle (loader->handle);
p_free (loader);
}
P_LIB_API pchar *
p_library_loader_get_last_error (PLibraryLoader *loader)
{
if (loader == NULL)
return NULL;
switch (loader->last_status) {
case B_OK:
return NULL;
case B_BAD_IMAGE_ID:
return p_strdup ("Image handler doesn't identify an existing image");
case B_BAD_INDEX:
return p_strdup ("Invalid symbol index");
default:
return p_strdup ("Unknown error");
}
}
P_LIB_API pboolean
p_library_loader_is_ref_counted (void)
{
return TRUE;
}
void
p_library_loader_init (void)
{
}
void
p_library_loader_shutdown (void)
{
}
|
