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TWin32Mutex.cxx
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1// @(#)root/thread:$Id$
2// Author: Bertrand Bellenot 23/10/04
3
4/*************************************************************************
5 * Copyright (C) 1995-2004, 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//////////////////////////////////////////////////////////////////////////
13// //
14// TWin32Mutex //
15// //
16// This class provides an interface to the Win32 mutex routines. //
17// //
18//////////////////////////////////////////////////////////////////////////
19
20#ifndef _WIN32_WINNT
21#define _WIN32_WINNT 0x0501 // needed for TryEnterCriticalSection
22#endif
23
24#include "TThread.h"
25#include "TWin32Mutex.h"
26
28
29////////////////////////////////////////////////////////////////////////////////
30/// Create a Win32 mutex lock.
31
33{
34 ::InitializeCriticalSection(&fCritSect);
35}
36
37////////////////////////////////////////////////////////////////////////////////
38/// TMutex dtor.
39
41{
42 ::DeleteCriticalSection(&fCritSect);
43}
44
45////////////////////////////////////////////////////////////////////////////////
46/// Lock the mutex.
47
49{
50 ::EnterCriticalSection(&fCritSect);
51 return 0;
52}
53
54////////////////////////////////////////////////////////////////////////////////
55/// Try locking the mutex. Returns 0 if mutex can be locked.
56
58{
59 if (::TryEnterCriticalSection(&fCritSect))
60 return 0;
61 return 1;
62}
63
64////////////////////////////////////////////////////////////////////////////////
65/// Unlock the mutex.
66
68{
69 ::LeaveCriticalSection(&fCritSect);
70 return 0;
71}
ClassImp(TWin32Mutex)
Int_t Lock() override
Lock the mutex.
Definition: TWin32Mutex.cxx:48
Int_t UnLock() override
Unlock the mutex.
Definition: TWin32Mutex.cxx:67
virtual ~TWin32Mutex()
TMutex dtor.
Definition: TWin32Mutex.cxx:40
TWin32Mutex(Bool_t recursive=kFALSE)
Create a Win32 mutex lock.
Definition: TWin32Mutex.cxx:32
Int_t TryLock() override
Try locking the mutex. Returns 0 if mutex can be locked.
Definition: TWin32Mutex.cxx:57
CRITICAL_SECTION fCritSect
Definition: TWin32Mutex.h:37