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TWin32AtomicCount.h
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1// @(#)root/thread:$Id$
2// Author: Fons Rademakers 14/11/06
3
4/*************************************************************************
5 * Copyright (C) 1995-2006, Rene Brun and Fons Rademakers. *
6 * All rights reserved. *
7 * *
8 * For the licensing terms see $ROOTSYS/LICENSE. *
9 * For the list of contributors see $ROOTSYS/README/CREDITS. *
10 *************************************************************************/
11
12#ifndef ROOT_TWin32AtomicCount
13#define ROOT_TWin32AtomicCount
14
15//////////////////////////////////////////////////////////////////////////
16// //
17// TWin32AtomicCount //
18// //
19// Class providing atomic operations on a long. Setting, getting, //
20// incrementing and decrementing are atomic, thread safe, operations. //
21// //
22// This implementation uses the Win32 InterLocked API for locking. //
23// //
24//////////////////////////////////////////////////////////////////////////
25
26#ifndef ROOT_TAtomicCount
27#error "Do not use TWin32AtomicCount.h directly. #include \"TAtomicCount.h\" instead."
28#endif // ROOT_TAtomicCount
29
30# include "Windows4Root.h"
31
32class TAtomicCount {
33private:
34 Long_t fCnt; // counter
35
36 TAtomicCount(const TAtomicCount &) = delete;
38
39public:
40 explicit TAtomicCount(Long_t v) : fCnt(v) { }
41 void operator++() { _InterlockedIncrement(&fCnt); }
42 Long_t operator--() { return _InterlockedDecrement(&fCnt); }
43 operator long() const { return static_cast<long const volatile &>(fCnt); }
44 void Set(Long_t v) { fCnt = v; }
45 Long_t Get() const { return static_cast<long const volatile &>(fCnt); }
46};
47
48#endif
long Long_t
Definition: RtypesCore.h:54
Long_t Get() const
TAtomicCount(const TAtomicCount &)=delete
TAtomicCount(Long_t v)
Long_t operator--()
TAtomicCount & operator=(const TAtomicCount &)=delete
void Set(Long_t v)