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
|
/* -*- mode: C++; c-basic-offset: 4; indent-tabs-mode: nil; -*- */
// SPDX-License-Identifier: MIT OR LGPL-2.0-or-later
// SPDX-FileCopyrightText: 2008 litl, LLC
#include <config.h>
#include <girepository.h>
#include <js/CallArgs.h>
#include <js/Class.h>
#include <js/RootingAPI.h>
#include <js/TypeDecls.h>
#include <js/Utility.h> // for UniqueChars
#include <js/Warnings.h>
#include "gi/arg-inl.h"
#include "gi/function.h"
#include "gi/repo.h"
#include "gi/union.h"
#include "cjs/jsapi-util.h"
#include "cjs/macros.h"
#include "cjs/mem-private.h"
#include "util/log.h"
UnionPrototype::UnionPrototype(GIUnionInfo* info, GType gtype)
: GIWrapperPrototype(info, gtype) {
GJS_INC_COUNTER(union_prototype);
}
UnionPrototype::~UnionPrototype(void) { GJS_DEC_COUNTER(union_prototype); }
UnionInstance::UnionInstance(UnionPrototype* prototype, JS::HandleObject obj)
: GIWrapperInstance(prototype, obj) {
GJS_INC_COUNTER(union_instance);
}
UnionInstance::~UnionInstance(void) {
if (m_ptr) {
g_boxed_free(gtype(), m_ptr);
m_ptr = nullptr;
}
GJS_DEC_COUNTER(union_instance);
}
// See GIWrapperBase::resolve().
bool UnionPrototype::resolve_impl(JSContext* context, JS::HandleObject obj,
JS::HandleId id, bool* resolved) {
JS::UniqueChars prop_name;
if (!gjs_get_string_id(context, id, &prop_name))
return false;
if (!prop_name) {
*resolved = false;
return true; // not resolved, but no error
}
// Look for methods and other class properties
GjsAutoFunctionInfo method_info =
g_union_info_find_method(info(), prop_name.get());
if (method_info) {
#if GJS_VERBOSE_ENABLE_GI_USAGE
_gjs_log_info_usage(method_info);
#endif
if (g_function_info_get_flags (method_info) & GI_FUNCTION_IS_METHOD) {
gjs_debug(GJS_DEBUG_GBOXED,
"Defining method %s in prototype for %s.%s",
method_info.name(), ns(), name());
/* obj is union proto */
if (!gjs_define_function(context, obj, gtype(), method_info))
return false;
*resolved = true; /* we defined the prop in object_proto */
} else {
*resolved = false;
}
} else {
*resolved = false;
}
return true;
}
GJS_JSAPI_RETURN_CONVENTION
static void* union_new(JSContext* context, JS::HandleObject this_obj,
const JS::CallArgs& args, GIUnionInfo* info) {
int n_methods;
int i;
/* Find a zero-args constructor and call it */
n_methods = g_union_info_get_n_methods(info);
for (i = 0; i < n_methods; ++i) {
GIFunctionInfoFlags flags;
GjsAutoFunctionInfo func_info = g_union_info_get_method(info, i);
flags = g_function_info_get_flags(func_info);
if ((flags & GI_FUNCTION_IS_CONSTRUCTOR) != 0 &&
g_callable_info_get_n_args((GICallableInfo*) func_info) == 0) {
GIArgument rval;
if (!gjs_invoke_constructor_from_c(context, func_info, this_obj,
args, &rval))
return nullptr;
if (!gjs_arg_get<void*>(&rval)) {
gjs_throw(context,
"Unable to construct union type %s as its"
"constructor function returned null",
g_base_info_get_name(info));
return nullptr;
}
return gjs_arg_get<void*>(&rval);
}
}
gjs_throw(context, "Unable to construct union type %s since it has no zero-args <constructor>, can only wrap an existing one",
g_base_info_get_name((GIBaseInfo*) info));
return nullptr;
}
// See GIWrapperBase::constructor().
bool UnionInstance::constructor_impl(JSContext* context,
JS::HandleObject object,
const JS::CallArgs& args) {
if (args.length() > 0 &&
!JS::WarnUTF8(context, "Arguments to constructor of %s ignored",
name()))
return false;
m_ptr = union_new(context, object, args, info());
return !!m_ptr;
}
// clang-format off
const struct JSClassOps UnionBase::class_ops = {
nullptr, // addProperty
nullptr, // deleteProperty
nullptr, // enumerate
nullptr, // newEnumerate
&UnionBase::resolve,
nullptr, // mayResolve
&UnionBase::finalize,
};
const struct JSClass UnionBase::klass = {
"GObject_Union",
JSCLASS_HAS_RESERVED_SLOTS(1) | JSCLASS_FOREGROUND_FINALIZE,
&UnionBase::class_ops
};
// clang-format on
bool UnionPrototype::define_class(JSContext* context,
JS::HandleObject in_object,
GIUnionInfo* info) {
GType gtype;
JS::RootedObject prototype(context), constructor(context);
/* For certain unions, we may be able to relax this in the future by
* directly allocating union memory, as we do for structures in boxed.c
*/
gtype = g_registered_type_info_get_g_type( (GIRegisteredTypeInfo*) info);
if (gtype == G_TYPE_NONE) {
gjs_throw(context, "Unions must currently be registered as boxed types");
return false;
}
return !!UnionPrototype::create_class(context, in_object, info, gtype,
&constructor, &prototype);
}
JSObject* UnionInstance::new_for_c_union(JSContext* context, GIUnionInfo* info,
void* gboxed) {
GType gtype;
if (!gboxed)
return nullptr;
/* For certain unions, we may be able to relax this in the future by
* directly allocating union memory, as we do for structures in boxed.c
*/
gtype = g_registered_type_info_get_g_type( (GIRegisteredTypeInfo*) info);
if (gtype == G_TYPE_NONE) {
gjs_throw(context, "Unions must currently be registered as boxed types");
return nullptr;
}
gjs_debug_marshal(GJS_DEBUG_GBOXED,
"Wrapping union %s %p with JSObject",
g_base_info_get_name((GIBaseInfo *)info), gboxed);
JS::RootedObject obj(context,
gjs_new_object_with_generic_prototype(context, info));
if (!obj)
return nullptr;
UnionInstance* priv = UnionInstance::new_for_js_object(context, obj);
priv->copy_union(gboxed);
return obj;
}
void* UnionInstance::copy_ptr(JSContext* cx, GType gtype, void* ptr) {
if (g_type_is_a(gtype, G_TYPE_BOXED))
return g_boxed_copy(gtype, ptr);
gjs_throw(cx,
"Can't transfer ownership of a union type not registered as "
"boxed");
return nullptr;
}
|
