| TagLib 1.13 |  |

trefcounter.h
Go to the documentation of this file.
1/***************************************************************************
2 copyright : (C) 2013 by Tsuda Kageyu
3 email : tsuda.kageyu@gmail.com
4 ***************************************************************************/
5
6/***************************************************************************
7 * This library is free software; you can redistribute it and/or modify *
8 * it under the terms of the GNU Lesser General Public License version *
9 * 2.1 as published by the Free Software Foundation. *
10 * *
11 * This library is distributed in the hope that it will be useful, but *
12 * WITHOUT ANY WARRANTY; without even the implied warranty of *
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU *
14 * Lesser General Public License for more details. *
15 * *
16 * You should have received a copy of the GNU Lesser General Public *
17 * License along with this library; if not, write to the Free Software *
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA *
19 * 02110-1301 USA *
20 * *
21 * Alternatively, this file is available under the Mozilla Public *
22 * License Version 1.1. You may obtain a copy of the License at *
23 * http://www.mozilla.org/MPL/ *
24 ***************************************************************************/
25
26#ifndef TAGLIB_REFCOUNTER_H
27#define TAGLIB_REFCOUNTER_H
28
29#include "taglib_export.h"
30#include "taglib.h"
31
32#ifdef __APPLE__
33# define OSATOMIC_DEPRECATED 0
34# include <libkern/OSAtomic.h>
35# define TAGLIB_ATOMIC_MAC
36#elif defined(WIN32) || defined(_WIN32) || defined(__WIN32__) || defined(__CYGWIN__)
37# ifndef NOMINMAX
38# define NOMINMAX
39# endif
40# include <windows.h>
41# define TAGLIB_ATOMIC_WIN
42#elif defined (__GNUC__) && (__GNUC__ * 100 + __GNUC_MINOR__ >= 401) \
43 && (defined(__i386__) || defined(__i486__) || defined(__i586__) || \
44 defined(__i686__) || defined(__x86_64) || defined(__ia64)) \
45 && !defined(__INTEL_COMPILER)
46# define TAGLIB_ATOMIC_GCC
47#elif defined(__ia64) && defined(__INTEL_COMPILER)
48# include <ia64intrin.h>
49# define TAGLIB_ATOMIC_GCC
50#endif
51
52#ifndef DO_NOT_DOCUMENT // Tell Doxygen to skip this class.
59 namespace TagLib
60{
61
62 class TAGLIB_EXPORT RefCounter
63 {
64 public:
65 RefCounter();
66 virtual ~RefCounter();
67
68 void ref();
69 bool deref();
70 int count() const;
71
72 private:
73 class RefCounterPrivate;
74 RefCounterPrivate *d;
75 };
76
77 // BIC this old class is needed by tlist.tcc and tmap.tcc
78 class RefCounterOld
79 {
80 public:
81 RefCounterOld() : refCount(1) {}
82
83#ifdef TAGLIB_ATOMIC_MAC
84 void ref() { OSAtomicIncrement32Barrier(const_cast<int32_t*>(&refCount)); }
85 bool deref() { return ! OSAtomicDecrement32Barrier(const_cast<int32_t*>(&refCount)); }
86 int32_t count() { return refCount; }
87 private:
88 volatile int32_t refCount;
89#elif defined(TAGLIB_ATOMIC_WIN)
90 void ref() { InterlockedIncrement(&refCount); }
91 bool deref() { return ! InterlockedDecrement(&refCount); }
92 long count() { return refCount; }
93 private:
94 volatile long refCount;
95#elif defined(TAGLIB_ATOMIC_GCC)
96 void ref() { __sync_add_and_fetch(&refCount, 1); }
97 bool deref() { return ! __sync_sub_and_fetch(&refCount, 1); }
98 int count() { return refCount; }
99 private:
100 volatile int refCount;
101#else
102 void ref() { refCount++; }
103 bool deref() { return ! --refCount; }
104 int count() { return refCount; }
105 private:
106 unsigned int refCount;
107#endif
108 };
109
110}
111
112#endif // DO_NOT_DOCUMENT
113#endif
114
taglib.h
taglib_export.h
TAGLIB_EXPORT
#define TAGLIB_EXPORT
Definition: taglib_export.h:40