1 /*
2 ******************************************************************************
3 * Copyright (C) 2014, International Business Machines
4 * Corporation and others.  All Rights Reserved.
5 ******************************************************************************
6 * sharedbreakiterator.h
7 */
8 
9 #ifndef __SHARED_BREAKITERATOR_H__
10 #define __SHARED_BREAKITERATOR_H__
11 
12 #include "unicode/utypes.h"
13 #include "sharedobject.h"
14 
15 #if !UCONFIG_NO_BREAK_ITERATION
16 
17 U_NAMESPACE_BEGIN
18 
19 class BreakIterator;
20 
21 // SharedBreakIterator encapsulates a shared BreakIterator. Because
22 // BreakIterator has mutable semantics, clients must ensure that all uses
23 // of a particular shared BreakIterator is protected by the same mutex
24 // ensuring that only one thread at a time gets access to that shared
25 // BreakIterator. Clients can accomplish this by creating a mutex for all
26 // uses of break iterator within a particular class. Then objects of that
27 // class may then freely share break iterators among themselves. However,
28 // these shared break iterators must never be exposed outside of that class.
29 class U_I18N_API SharedBreakIterator : public SharedObject {
30 public:
31     SharedBreakIterator(BreakIterator *biToAdopt);
32     virtual ~SharedBreakIterator();
33 
get()34     BreakIterator *get() const { return ptr; }
35     BreakIterator *operator->() const { return ptr; }
36     BreakIterator &operator*() const { return *ptr; }
37 private:
38     BreakIterator *ptr;
39     SharedBreakIterator(const SharedBreakIterator &);
40     SharedBreakIterator &operator=(const SharedBreakIterator &);
41 };
42 
43 U_NAMESPACE_END
44 
45 #endif
46 
47 #endif
48