94 lines
1.9 KiB
C++
94 lines
1.9 KiB
C++
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///+---------------------------------------------------------------------------
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//
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// Microsoft Windows
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// Copyright (C) Microsoft Corporation, 1993 - 1998.
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//
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// File: Mutex.Hxx
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//
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// Contents: Mutex classes
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//
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// Classes: CNamedMutex, CNamedMutexLock
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//
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// History: 29-March-94 t-joshh Created.
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//
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//----------------------------------------------------------------------------
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#pragma once
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//+---------------------------------------------------------------------------
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//
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// Class: CNamedMutex
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//
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// Purpose: Provide mutual exclusion among several processes
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//
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// History: 29-March-94 t-joshh Created.
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//
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// Notes: When creating a mutex, a well-known name must be provided.
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//
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//----------------------------------------------------------------------------
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class CNamedMutex
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{
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public :
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CNamedMutex() : _hNamedMutex( 0 ) {}
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void Init( WCHAR const * pwszNameMutex )
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{
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// Create with the process default security
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_hNamedMutex = CreateMutex( 0, FALSE, pwszNameMutex );
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if ( 0 == _hNamedMutex )
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THROW( CException() );
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}
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~CNamedMutex ()
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{
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CloseHandle( _hNamedMutex );
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}
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ULONG Request(DWORD dwMilliseconds = INFINITE)
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{
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return WaitForSingleObject ( _hNamedMutex, dwMilliseconds );
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}
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void Release()
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{
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ReleaseMutex( _hNamedMutex );
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}
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private :
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HANDLE _hNamedMutex;
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};
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//+---------------------------------------------------------------------------
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//
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// Class: CNamedMutexLock
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//
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// Purpose: Gets and releases the lock
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//
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// History: 14-Jan-98 dlee Created.
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//
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//----------------------------------------------------------------------------
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class CNamedMutexLock
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{
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public:
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CNamedMutexLock( CNamedMutex & mutex ) :
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_mutex( mutex )
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{
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_mutex.Request();
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}
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~CNamedMutexLock()
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{
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_mutex.Release();
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}
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private:
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CNamedMutex & _mutex;
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};
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