/[svn]/linuxsampler/trunk/src/common/Mutex.h
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revision 880 by schoenebeck, Tue Jun 27 22:57:37 2006 UTC revision 2500 by schoenebeck, Fri Jan 10 12:20:05 2014 UTC
# Line 3  Line 3 
3   *   LinuxSampler - modular, streaming capable sampler                     *   *   LinuxSampler - modular, streaming capable sampler                     *
4   *                                                                         *   *                                                                         *
5   *   Copyright (C) 2003, 2004 by Benno Senoner and Christian Schoenebeck   *   *   Copyright (C) 2003, 2004 by Benno Senoner and Christian Schoenebeck   *
6   *   Copyright (C) 2005, 2006 Christian Schoenebeck                        *   *   Copyright (C) 2005 - 2014 Christian Schoenebeck                       *
7   *                                                                         *   *                                                                         *
8   *   This program is free software; you can redistribute it and/or modify  *   *   This program is free software; you can redistribute it and/or modify  *
9   *   it under the terms of the GNU General Public License as published by  *   *   it under the terms of the GNU General Public License as published by  *
# Line 24  Line 24 
24  #ifndef __MUTEX_H__  #ifndef __MUTEX_H__
25  #define __MUTEX_H__  #define __MUTEX_H__
26    
27    #if defined(WIN32)
28    #include <windows.h>
29    #else
30  #include <pthread.h>  #include <pthread.h>
31    #endif
32    
33  namespace LinuxSampler {  namespace LinuxSampler {
34    
# Line 84  class Mutex { Line 88  class Mutex {
88           * Lock() call, one of them will be awaken.           * Lock() call, one of them will be awaken.
89           */           */
90          void Unlock();          void Unlock();
91            
92      protected:      protected:
93        #if defined(WIN32)
94            HANDLE hMutex;
95        #else
96          pthread_mutex_t     __posix_mutex;          pthread_mutex_t     __posix_mutex;
97          pthread_mutexattr_t __posix_mutexattr;          pthread_mutexattr_t __posix_mutexattr;
98        #endif
99    };
100    
101    // Lock guard for exception safe locking
102    class LockGuard {
103    public:
104        LockGuard(Mutex& m) : pm(&m) {
105            m.Lock();
106        }
107    
108        /**
109         * Empty LockGuard. This constructor can be used to implement conditional
110         * mutex protection like:
111         * @code
112         * Mutex m;
113         * LockGuard g;
114         * if (requiresMutexProtection()) g = LockGuard(m);
115         * @endcode
116         */
117        LockGuard() : pm(NULL) {
118        }
119    
120        LockGuard(LockGuard& g) : pm(g.pm) {
121            if (pm) pm->Lock();
122        }
123    
124        ~LockGuard() {
125            if (pm) pm->Unlock();
126        }
127    private:
128        Mutex* pm;
129  };  };
130    
131  } // namespace LinuxSampler  } // namespace LinuxSampler
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