MADARA  3.1.8
SystemCallGetTime.cpp
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1 
2 #ifndef _MADARA_NO_KARL_
3 
4 
10 
11 
14  const ComponentNodes & nodes)
15  : SystemCallNode (context, nodes)
16 {
17 
18 }
19 
20 // Dtor
22 {
23 }
24 
27 {
29 }
30 
36 {
37  // user can always change a function, and we have no control over
38  // what it does. Consequently, a function node cannot be pruned out
39  // under any situation
40  can_change = true;
41 
43 
44  if (nodes_.size () > 0)
45  {
46  bool arg_can_change = false;
47  result = nodes_[0]->prune (arg_can_change);
48 
49  if (!arg_can_change && dynamic_cast <LeafNode *> (nodes_[0]) == 0)
50  {
51  delete nodes_[0];
52  nodes_[0] = new LeafNode (*(this->logger_), result);
53  }
54  }
55 
56  return result;
57 }
58 
64 {
66  "System call get_time is returning the system clock\n");
67 
70 }
71 
72 // accept a visitor
73 void
75  madara::expression::Visitor &visitor) const
76 {
77  visitor.visit (*this);
78 }
79 
80 #endif // _MADARA_NO_KARL_
This class encapsulates an entry in a KnowledgeBase.
madara::knowledge::KnowledgeRecord KnowledgeRecord
std::deque< ComponentNode * > ComponentNodes
a vector of Component Nodes
MADARA_Export int64_t get_time(void)
Returns a time of day in nanoseconds.
Definition: Utility.cpp:805
logger::Logger * logger_
handle the context
Definition: ComponentNode.h:96
This class stores variables and their values for use by any entity needing state information in a thr...
virtual madara::knowledge::KnowledgeRecord prune(bool &can_change)
Prunes the expression tree of unnecessary nodes.
Defines a node that contains a madara::knowledge::KnowledgeRecord::Integer value. ...
Definition: LeafNode.h:23
virtual madara::knowledge::KnowledgeRecord evaluate(const madara::knowledge::KnowledgeUpdateSettings &settings)
Evaluates the expression tree.
virtual ~SystemCallGetTime(void)
Destructor.
#define madara_logger_ptr_log(logger, level,...)
Fast version of the madara::logger::log method for Logger pointers.
Definition: Logger.h:32
Abstract base class for all visitors to all classes that derive from ComponentNode.
Definition: Visitor.h:90
Interface for a MADARA system call.
SystemCallGetTime(madara::knowledge::ThreadSafeContext &context, const ComponentNodes &nodes)
Constructor.
Settings for applying knowledge updates.
virtual void visit(const LeafNode &node)=0
Visit a LeafNode.
virtual void accept(Visitor &visitor) const
Accepts a visitor subclassed from the Visitor class.
virtual madara::knowledge::KnowledgeRecord item(void) const
Returns the value of the node.