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
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
|
/* -*- C -*-
* $Id$
*/
#include <ruby.h>
#include "dl.h"
VALUE rb_cDLHandle;
void
dlhandle_free(struct dl_handle *dlhandle)
{
if (dlhandle->ptr && dlhandle->open && dlhandle->enable_close) {
dlclose(dlhandle->ptr);
}
}
VALUE
rb_dlhandle_close(VALUE self)
{
struct dl_handle *dlhandle;
Data_Get_Struct(self, struct dl_handle, dlhandle);
dlhandle->open = 0;
return INT2NUM(dlclose(dlhandle->ptr));
}
VALUE
rb_dlhandle_s_allocate(VALUE klass)
{
VALUE obj;
struct dl_handle *dlhandle;
obj = Data_Make_Struct(rb_cDLHandle, struct dl_handle, 0,
dlhandle_free, dlhandle);
dlhandle->ptr = 0;
dlhandle->open = 0;
dlhandle->enable_close = 0;
return obj;
}
VALUE
rb_dlhandle_initialize(int argc, VALUE argv[], VALUE self)
{
void *ptr;
struct dl_handle *dlhandle;
VALUE lib, flag;
char *clib;
int cflag;
const char *err;
switch (rb_scan_args(argc, argv, "11", &lib, &flag)) {
case 1:
clib = NIL_P(lib) ? NULL : StringValuePtr(lib);
cflag = RTLD_LAZY | RTLD_GLOBAL;
break;
case 2:
clib = NIL_P(lib) ? NULL : StringValuePtr(lib);
cflag = NUM2INT(flag);
break;
default:
rb_bug("rb_dlhandle_new");
}
ptr = dlopen(clib, cflag);
#if defined(HAVE_DLERROR)
if (!ptr && (err = dlerror())) {
rb_raise(rb_eRuntimeError, "%s", err);
}
#else
if (!ptr) {
err = dlerror();
rb_raise(rb_eRuntimeError, "%s", err);
}
#endif
Data_Get_Struct(self, struct dl_handle, dlhandle);
if (dlhandle->ptr && dlhandle->open && dlhandle->enable_close) {
dlclose(dlhandle->ptr);
}
dlhandle->ptr = ptr;
dlhandle->open = 1;
dlhandle->enable_close = 0;
if (rb_block_given_p()) {
rb_ensure(rb_yield, self, rb_dlhandle_close, self);
}
return Qnil;
}
VALUE
rb_dlhandle_enable_close(VALUE self)
{
struct dl_handle *dlhandle;
Data_Get_Struct(self, struct dl_handle, dlhandle);
dlhandle->enable_close = 1;
return Qnil;
}
VALUE
rb_dlhandle_disable_close(VALUE self)
{
struct dl_handle *dlhandle;
Data_Get_Struct(self, struct dl_handle, dlhandle);
dlhandle->enable_close = 0;
return Qnil;
}
VALUE
rb_dlhandle_to_i(VALUE self)
{
struct dl_handle *dlhandle;
Data_Get_Struct(self, struct dl_handle, dlhandle);
return DLLONG2NUM(dlhandle);
}
VALUE
rb_dlhandle_to_ptr(VALUE self)
{
struct dl_handle *dlhandle;
Data_Get_Struct(self, struct dl_handle, dlhandle);
return rb_dlptr_new(dlhandle, sizeof(dlhandle), 0);
}
VALUE
rb_dlhandle_sym(int argc, VALUE argv[], VALUE self)
{
VALUE sym, type;
void (*func)();
VALUE val;
struct dl_handle *dlhandle;
void *handle;
const char *name, *stype;
const char *err;
rb_secure(2);
if (rb_scan_args(argc, argv, "11", &sym, &type) == 2) {
SafeStringValue(type);
stype = StringValuePtr(type);
}
else{
stype = NULL;
}
if (sym == Qnil) {
#if defined(RTLD_NEXT)
name = RTLD_NEXT;
#else
name = NULL;
#endif
}
else{
SafeStringValue(sym);
name = StringValuePtr(sym);
}
Data_Get_Struct(self, struct dl_handle, dlhandle);
if (!dlhandle->open) {
rb_raise(rb_eRuntimeError, "closed handle");
}
handle = dlhandle->ptr;
func = dlsym(handle, name);
#if defined(HAVE_DLERROR)
if (!func && (err = dlerror()))
#else
if (!func)
#endif
{
#if defined(__CYGWIN__) || defined(WIN32) || defined(__MINGW32__)
{
int len = strlen(name);
char *name_a = (char*)dlmalloc(len+2);
strcpy(name_a, name);
name_a[len] = 'A';
name_a[len+1] = '\0';
func = dlsym(handle, name_a);
dlfree(name_a);
#if defined(HAVE_DLERROR)
if (!func && (err = dlerror()))
#else
if (!func)
#endif
{
rb_raise(rb_eRuntimeError, "unknown symbol \"%sA\"", name);
}
}
#else
rb_raise(rb_eRuntimeError, "unknown symbol \"%s\"", name);
#endif
}
val = rb_dlsym_new(func, name, stype);
return val;
}
void
Init_dlhandle()
{
rb_cDLHandle = rb_define_class_under(rb_mDL, "Handle", rb_cObject);
rb_define_alloc_func(rb_cDLHandle, rb_dlhandle_s_allocate);
rb_define_method(rb_cDLHandle, "initialize", rb_dlhandle_initialize, -1);
rb_define_method(rb_cDLHandle, "to_i", rb_dlhandle_to_i, 0);
rb_define_method(rb_cDLHandle, "to_ptr", rb_dlhandle_to_ptr, 0);
rb_define_method(rb_cDLHandle, "close", rb_dlhandle_close, 0);
rb_define_method(rb_cDLHandle, "sym", rb_dlhandle_sym, -1);
rb_define_method(rb_cDLHandle, "[]", rb_dlhandle_sym, -1);
rb_define_method(rb_cDLHandle, "disable_close", rb_dlhandle_disable_close, 0);
rb_define_method(rb_cDLHandle, "enable_close", rb_dlhandle_enable_close, 0);
}
|
