1.1 --- a/lemon/bits/alteration_notifier.h	Mon Jul 16 16:21:40 2018 +0200
     1.2 +++ b/lemon/bits/alteration_notifier.h	Wed Oct 17 19:14:07 2018 +0200
     1.3 @@ -2,7 +2,7 @@
     1.4   *
     1.5   * This file is a part of LEMON, a generic C++ optimization library.
     1.6   *
     1.7 - * Copyright (C) 2003-2009
     1.8 + * Copyright (C) 2003-2013
     1.9   * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
    1.10   * (Egervary Research Group on Combinatorial Optimization, EGRES).
    1.11   *
    1.12 @@ -23,6 +23,7 @@
    1.13  #include <list>
    1.14  
    1.15  #include <lemon/core.h>
    1.16 +#include <lemon/bits/lock.h>
    1.17  
    1.18  //\ingroup graphbits
    1.19  //\file
    1.20 @@ -251,7 +252,7 @@
    1.21  
    1.22      typedef std::list<ObserverBase*> Observers;
    1.23      Observers _observers;
    1.24 -
    1.25 +    lemon::bits::Lock _lock;
    1.26  
    1.27    public:
    1.28  
    1.29 @@ -332,14 +333,18 @@
    1.30    protected:
    1.31  
    1.32      void attach(ObserverBase& observer) {
    1.33 +      _lock.lock();
    1.34        observer._index = _observers.insert(_observers.begin(), &observer);
    1.35        observer._notifier = this;
    1.36 +      _lock.unlock();
    1.37      }
    1.38  
    1.39      void detach(ObserverBase& observer) {
    1.40 +      _lock.lock();
    1.41        _observers.erase(observer._index);
    1.42        observer._index = _observers.end();
    1.43        observer._notifier = 0;
    1.44 +      _lock.unlock();
    1.45      }
    1.46  
    1.47    public: