Differences

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--- eeros_architecture:sequencer:define_sequence [2020/09/30 08:06] – [Returning Values] ursgraf
+++ eeros_architecture:sequencer:define_sequence [2023/02/26 00:25] (current) – [Add Parameters] ursgraf
@@ Line 56: / Line 56: @@
   }
 </code>
-Its mandatory to implement this function. If not, no work is done and the step or sequence terminates immediately. The method can return a value, e.g.  \\
+Its mandatory to implement this function. If not, no work is done and the step or sequence terminates immediately.
+A step or blocking sequence can return a value of type ''int''. This can be useful to hand back basic information to the calling sequence.  \\
 There might be sequences which should never stop. This must be done as shown below:
 <code cpp>
 public:
   int action() {
-    while (Sequencer::running) step1();
+    while (state == SequenceState::running) step1();
     // while (true) step1();  // WRONG!
     return 0;
   }
 </code>
-This guarantees that the sequence could be stopped by the main program due to some external event such as a signal.
+This guarantees that the sequence could be aborted, resumed or restarted due to exception sequences.
 ===== Define Preconditions =====
 You may want to start a sequence or step only if a certain precondition is met. Override the function //checkPreCondition()//, e.g.:
@@ Line 85: / Line 87: @@
 <code cpp>
   int operator() (double x, double y) {
-    this.x = x; // store the first parameter into a local variable for further use
+    this->x = x; // store the first parameter into a local variable for further use
-    this.y = y; // store the second parameter into a local variable for further use
+    this->y = y; // store the second parameter into a local variable for further use
     return start();  // this will start the step or sequence
   }