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
|
/*************************************************************************/
/* reference.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2020 Godot Engine contributors (cf. AUTHORS.md). */
/* */
/* 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 "reference.h"
#include "core/script_language.h"
bool Reference::init_ref() {
if (reference()) {
if (!is_referenced() && refcount_init.unref()) {
unreference(); // first referencing is already 1, so compensate for the ref above
}
return true;
} else {
return false;
}
}
void Reference::_bind_methods() {
ClassDB::bind_method(D_METHOD("init_ref"), &Reference::init_ref);
ClassDB::bind_method(D_METHOD("reference"), &Reference::reference);
ClassDB::bind_method(D_METHOD("unreference"), &Reference::unreference);
}
int Reference::reference_get_count() const {
return refcount.get();
}
bool Reference::reference() {
uint32_t rc_val = refcount.refval();
bool success = rc_val != 0;
if (success && rc_val <= 2 /* higher is not relevant */) {
if (get_script_instance()) {
get_script_instance()->refcount_incremented();
}
if (instance_binding_count > 0 && !ScriptServer::are_languages_finished()) {
for (int i = 0; i < MAX_SCRIPT_INSTANCE_BINDINGS; i++) {
if (_script_instance_bindings[i]) {
ScriptServer::get_language(i)->refcount_incremented_instance_binding(this);
}
}
}
}
return success;
}
bool Reference::unreference() {
uint32_t rc_val = refcount.unrefval();
bool die = rc_val == 0;
if (rc_val <= 1 /* higher is not relevant */) {
if (get_script_instance()) {
bool script_ret = get_script_instance()->refcount_decremented();
die = die && script_ret;
}
if (instance_binding_count > 0 && !ScriptServer::are_languages_finished()) {
for (int i = 0; i < MAX_SCRIPT_INSTANCE_BINDINGS; i++) {
if (_script_instance_bindings[i]) {
bool script_ret = ScriptServer::get_language(i)->refcount_decremented_instance_binding(this);
die = die && script_ret;
}
}
}
}
return die;
}
Reference::Reference() {
refcount.init();
refcount_init.init();
}
Reference::~Reference() {
}
Variant WeakRef::get_ref() const {
if (ref == 0)
return Variant();
Object *obj = ObjectDB::get_instance(ref);
if (!obj)
return Variant();
Reference *r = cast_to<Reference>(obj);
if (r) {
return REF(r);
}
return obj;
}
void WeakRef::set_obj(Object *p_object) {
ref = p_object ? p_object->get_instance_id() : 0;
}
void WeakRef::set_ref(const REF &p_ref) {
ref = p_ref.is_valid() ? p_ref->get_instance_id() : 0;
}
WeakRef::WeakRef() :
ref(0) {
}
void WeakRef::_bind_methods() {
ClassDB::bind_method(D_METHOD("get_ref"), &WeakRef::get_ref);
}
|