/[pcsx2_0.9.7]/branch/r3113_0.9.7_beta/3rdparty/wxWidgets/src/msw/snglinst.cpp
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Contents of /branch/r3113_0.9.7_beta/3rdparty/wxWidgets/src/msw/snglinst.cpp

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Revision 32 - (show annotations) (download)
Tue Sep 7 03:29:01 2010 UTC (9 years, 11 months ago) by william
File size: 3678 byte(s)
branching from upstream revision (http://pcsx2.googlecode.com/svn/trunk
): r3113 to
https://svn.netsolutions.dnsalias.com/websvn/ps2/pcsx2/pcsx2_0.9.7/branch/r3113_0.9.7_beta
1 ///////////////////////////////////////////////////////////////////////////////
2 // Name: msw/snglinst.cpp
3 // Purpose: implements wxSingleInstanceChecker class for Win32 using
4 // named mutexes
5 // Author: Vadim Zeitlin
6 // Modified by:
7 // Created: 08.06.01
8 // RCS-ID: $Id: snglinst.cpp 35650 2005-09-23 12:56:45Z MR $
9 // Copyright: (c) 2001 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
10 // License: wxWindows licence
11 ///////////////////////////////////////////////////////////////////////////////
12
13 // ============================================================================
14 // declarations
15 // ============================================================================
16
17 // ----------------------------------------------------------------------------
18 // headers
19 // ----------------------------------------------------------------------------
20
21 // For compilers that support precompilation, includes "wx.h".
22 #include "wx/wxprec.h"
23
24 #ifdef __BORLANDC__
25 #pragma hdrstop
26 #endif
27
28 #if wxUSE_SNGLINST_CHECKER && defined(__WIN32__)
29
30 #ifndef WX_PRECOMP
31 #include "wx/string.h"
32 #include "wx/log.h"
33 #endif //WX_PRECOMP
34
35 #include "wx/snglinst.h"
36
37 #include "wx/msw/private.h"
38
39 // ----------------------------------------------------------------------------
40 // wxSingleInstanceCheckerImpl: the real implementation class
41 // ----------------------------------------------------------------------------
42
43 class WXDLLEXPORT wxSingleInstanceCheckerImpl
44 {
45 public:
46 wxSingleInstanceCheckerImpl()
47 {
48 // we don't care about m_wasOpened, it can't be accessed before being
49 // initialized
50 m_hMutex = NULL;
51 }
52
53 bool Create(const wxString& name)
54 {
55 m_hMutex = ::CreateMutex(NULL, FALSE, name);
56 if ( !m_hMutex )
57 {
58 wxLogLastError(_T("CreateMutex"));
59
60 return false;
61 }
62
63 // mutex was either created or opened - see what really happened
64 m_wasOpened = ::GetLastError() == ERROR_ALREADY_EXISTS;
65
66 return true;
67 }
68
69 bool WasOpened() const
70 {
71 wxCHECK_MSG( m_hMutex, false,
72 _T("can't be called if mutex creation failed") );
73
74 return m_wasOpened;
75 }
76
77 ~wxSingleInstanceCheckerImpl()
78 {
79 if ( m_hMutex )
80 {
81 if ( !::CloseHandle(m_hMutex) )
82 {
83 wxLogLastError(_T("CloseHandle(mutex)"));
84 }
85 }
86 }
87
88 private:
89 // the result of the CreateMutex() call
90 bool m_wasOpened;
91
92 // the mutex handle, may be NULL
93 HANDLE m_hMutex;
94
95 DECLARE_NO_COPY_CLASS(wxSingleInstanceCheckerImpl)
96 };
97
98 // ============================================================================
99 // wxSingleInstanceChecker implementation
100 // ============================================================================
101
102 bool wxSingleInstanceChecker::Create(const wxString& name,
103 const wxString& WXUNUSED(path))
104 {
105 wxASSERT_MSG( !m_impl,
106 _T("calling wxSingleInstanceChecker::Create() twice?") );
107
108 // creating unnamed mutex doesn't have the same semantics!
109 wxASSERT_MSG( !name.empty(), _T("mutex name can't be empty") );
110
111 m_impl = new wxSingleInstanceCheckerImpl;
112
113 return m_impl->Create(name);
114 }
115
116 bool wxSingleInstanceChecker::IsAnotherRunning() const
117 {
118 wxCHECK_MSG( m_impl, false, _T("must call Create() first") );
119
120 // if the mutex had been opened, another instance is running - otherwise we
121 // would have created it
122 return m_impl->WasOpened();
123 }
124
125 wxSingleInstanceChecker::~wxSingleInstanceChecker()
126 {
127 delete m_impl;
128 }
129
130 #endif // wxUSE_SNGLINST_CHECKER

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