qt.core.refcount source code

1 /*
2  * DQt - D bindings for the Qt Toolkit
3  *
4  * GNU Lesser General Public License Usage
5  * This file may be used under the terms of the GNU Lesser
6  * General Public License version 3 as published by the Free Software
7  * Foundation and appearing in the file LICENSE.LGPL3 included in the
8  * packaging of this file. Please review the following information to
9  * ensure the GNU Lesser General Public License version 3 requirements
10  * will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
11  */
12 module qt.core.refcount;
13 extern(C++):
14 
15 import qt.config;
16 import qt.core.basicatomic;
17 import qt.helpers;
18 
19 extern(C++, "QtPrivate")
20 {
21 
22 
23 extern(C++, class) struct RefCount
24 {
25 public:
26     extern(D) pragma(inline, true) bool ref_(string filename = __FILE__, size_t line = __LINE__)/+ noexcept+/ {
27         int count = atomic.loadRelaxed();
28         if (count != -1) // !isStatic
29             atomic.ref_();
30         return true;
31     }
32 
33     extern(D) pragma(inline, true) bool deref(string filename = __FILE__, size_t line = __LINE__)/+ noexcept+/ {
34         int count = atomic.loadRelaxed();
35         if (count == -1) // isStatic
36             return true;
37         return atomic.deref();
38     }
39 
40 /+    bool isStatic() const/+ noexcept+/
41     {
42         // Persistent object, never deleted
43         return atomic.loadRelaxed() == -1;
44     }+/
45 
46     bool isShared() const/+ noexcept+/
47     {
48         int count = atomic.loadRelaxed();
49         return (count != 1) && (count != 0);
50     }
51 
52 //    void initializeOwned()/+ noexcept+/ { atomic.storeRelaxed(1); }
53 //    void initializeUnsharable()/+ noexcept+/ { atomic.storeRelaxed(0); }
54 
55     QBasicAtomicInt atomic;
56 }
57 
58 }
59 
60 /+ #define Q_REFCOUNT_INITIALIZE_STATIC { Q_BASIC_ATOMIC_INITIALIZER(-1) } +/
61 
62 
63 enum Q_REFCOUNT_INITIALIZE_STATIC = RefCount(QBasicAtomicInt(-1));
64