DataObjectLocked.hpp
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1 /***************************************************************************
2  tag: Peter Soetens Mon Jan 19 14:11:26 CET 2004 DataObjectLocked.hpp
3 
4  DataObjectLocked.hpp - description
5  -------------------
6  begin : Mon January 19 2004
7  copyright : (C) 2004 Peter Soetens
8  email : peter.soetens@mech.kuleuven.ac.be
9 
10  ***************************************************************************
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37 
38 #ifndef CORELIB_DATAOBJECT_LOCKED_HPP
39 #define CORELIB_DATAOBJECT_LOCKED_HPP
40 
41 
42 #include "../os/MutexLock.hpp"
43 #include "DataObjectInterface.hpp"
44 
45 namespace RTT
46 { namespace base {
47 
56  template<class T>
58  : public DataObjectInterface<T>
59  {
63 
64  mutable os::Mutex lock;
65 
69  value_t data;
70 
71  mutable FlowStatus status;
73 
74  public:
79  : data(), status(NoData), initialized(false) {}
80 
84  DataObjectLocked( param_t initial_value )
85  : data(initial_value), status(NoData), initialized(true) {}
86 
90  typedef T DataType;
91 
92  virtual FlowStatus Get( reference_t pull, bool copy_old_data = true ) const {
93  os::MutexLock locker(lock);
94  FlowStatus result = status;
95  if (status == NewData) {
96  pull = data;
97  status = OldData;
98  } else if ((status == OldData) && copy_old_data) {
99  pull = data;
100  }
101  return result;
102  }
103 
104  virtual value_t Get() const {
105  DataType cache = DataType();
106  Get(cache);
107  return cache;
108  }
109 
110  virtual bool Set( param_t push ) {
111  os::MutexLock locker(lock);
112  data = push;
113  status = NewData;
114  return true;
115  }
116 
117  virtual bool data_sample( param_t sample, bool reset ) {
118  os::MutexLock locker(lock);
119  if (!initialized || reset) {
120  data = sample;
121  status = NoData;
122  initialized = true;
123  return true;
124  } else {
125  return initialized;
126  }
127  }
128 
132  virtual value_t data_sample() const {
133  os::MutexLock locker(lock);
134  return data;
135  }
136 
137  virtual void clear() {
138  os::MutexLock locker(lock);
139  status = NoData;
140  }
141  };
142 }}
143 
144 #endif
145 
DataObjectLocked(param_t initial_value)
DataObjectInterface< T >::reference_t reference_t
virtual FlowStatus Get(reference_t pull, bool copy_old_data=true) const
FlowStatus
Definition: FlowStatus.hpp:56
virtual value_t data_sample() const
virtual value_t Get() const
boost::call_traits< T >::param_type param_t
virtual bool Set(param_t push)
DataObjectInterface< T >::param_t param_t
A DataObjectInterface implements multi-threaded read/write solutions.
DataObjectInterface< T >::value_t value_t
A class which provides locked/protected access to one typed element of data.
boost::call_traits< T >::reference reference_t
An object oriented wrapper around a non recursive mutex.
Definition: Mutex.hpp:92
Contains TaskContext, Activity, OperationCaller, Operation, Property, InputPort, OutputPort, Attribute.
Definition: Activity.cpp:53
virtual bool data_sample(param_t sample, bool reset)
MutexLock is a scope based Monitor, protecting critical sections with a Mutex object through locking ...
Definition: MutexLock.hpp:51


rtt
Author(s): RTT Developers
autogenerated on Tue Jun 25 2019 19:33:23