Diff: ble/CallChainOfFunctionPointersWithContext.h

Revision:

992:ca834f7ae8ed

Parent:

990:53ac0ac3aa39

Child:

993:4d62b7967c11

--- a/ble/CallChainOfFunctionPointersWithContext.h	Thu Nov 26 14:51:22 2015 +0000
+++ b/ble/CallChainOfFunctionPointersWithContext.h	Wed Dec 02 10:29:44 2015 +0000
@@ -18,7 +18,6 @@
 
 #include <string.h>
 #include "FunctionPointerWithContext.h"
-#include "SafeBool.h"
 
 
 /** Group one or more functions in an instance of a CallChainOfFunctionPointersWithContext, then call them in
@@ -57,14 +56,14 @@
  */
 
 template <typename ContextType>
-class CallChainOfFunctionPointersWithContext : public SafeBool<CallChainOfFunctionPointersWithContext<ContextType> > {
+class CallChainOfFunctionPointersWithContext {
 public:
     typedef FunctionPointerWithContext<ContextType> *pFunctionPointerWithContext_t;
 
 public:
-    /** Create an empty chain.
+    /** Create an empty chain
      *
-     *  @param size (optional) Initial size of the chain.
+     *  @param size (optional) Initial size of the chain
      */
     CallChainOfFunctionPointersWithContext() : chainHead(NULL) {
         /* empty */
@@ -74,73 +73,30 @@
         clear();
     }
 
-    /** Add a function at the front of the chain.
+    /** Add a function at the front of the chain
      *
-     *  @param function A pointer to a void function.
+     *  @param function A pointer to a void function
      *
      *  @returns
-     *  The function object created for 'function'.
+     *  The function object created for 'function'
      */
     pFunctionPointerWithContext_t add(void (*function)(ContextType context)) {
         return common_add(new FunctionPointerWithContext<ContextType>(function));
     }
 
-    /** Add a function at the front of the chain.
+    /** Add a function at the front of the chain
      *
-     *  @param tptr Pointer to the object to call the member function on.
-     *  @param mptr Pointer to the member function to be called.
+     *  @param tptr pointer to the object to call the member function on
+     *  @param mptr pointer to the member function to be called
      *
      *  @returns
-     *  The function object created for 'tptr' and 'mptr'.
+     *  The function object created for 'tptr' and 'mptr'
      */
     template<typename T>
     pFunctionPointerWithContext_t add(T *tptr, void (T::*mptr)(ContextType context)) {
         return common_add(new FunctionPointerWithContext<ContextType>(tptr, mptr));
     }
 
-    /** Add a function at the front of the chain.
-     *
-     *  @param func The FunctionPointerWithContext to add.
-     */
-    pFunctionPointerWithContext_t add(const FunctionPointerWithContext<ContextType>& func) {
-        return common_add(new FunctionPointerWithContext<ContextType>(func));
-    }
-
-    /** 
-     * Detach a function pointer from a callchain
-     * 
-     * @oaram toDetach FunctionPointerWithContext to detach from this callchain
-     * 
-     * @return true if a function pointer has been detached and false otherwise
-     */ 
-    bool detach(const FunctionPointerWithContext<ContextType>& toDetach) { 
-        pFunctionPointerWithContext_t current = chainHead;
-        pFunctionPointerWithContext_t previous = NULL;
-
-        while (current) {
-            if(*current == toDetach) { 
-                if(previous == NULL) {
-                    if(currentCalled == current) { 
-                        currentCalled = NULL;
-                    }
-                    chainHead = current->getNext();
-                } else {
-                    if(currentCalled == current) { 
-                        currentCalled = previous;
-                    }
-                    previous->chainAsNext(current->getNext());
-                }
-                delete current;
-                return true;
-            }
-
-            previous = current;
-            current = current->getNext();
-        }
-
-        return false;
-    }
-
     /** Clear the call chain (remove all functions in the chain).
      */
     void clear(void) {
@@ -159,56 +115,16 @@
     }
 
     /** Call all the functions in the chain in sequence
+     * @Note: the stack frames of all the callbacks within the chained
+     *        FunctionPointers will stack up. Hopefully there won't be too many
+     *        chained FunctionPointers.
      */
     void call(ContextType context) {
-        ((const CallChainOfFunctionPointersWithContext*) this)->call(context);
-    }
-
-    /**
-     * @brief same as above but const 
-     */
-    void call(ContextType context) const {
-        currentCalled = chainHead;
-
-        while(currentCalled) { 
-            currentCalled->call(context);
-            // if this was the head and the call removed the head
-            if(currentCalled == NULL) { 
-                currentCalled = chainHead;
-            } else {
-                currentCalled = currentCalled->getNext();
-            }
+        if (chainHead) {
+            chainHead->call(context);
         }
     }
 
-    /**
-     * @brief same as above but with function call operator
-     * \code
-     * 
-     * void first(bool);
-     * void second(bool);
-     * 
-     * CallChainOfFunctionPointerWithContext<bool> foo;
-     * 
-     * foo.attach(first);
-     * foo.attach(second);
-     * 
-     * // call the callchain like a function
-     * foo(true);
-     * 
-     * \endcode
-     */
-    void operator()(ContextType context) const {
-        call(context);
-    }
-
-    /**
-     * @brief bool conversion operation
-     */
-    bool toBool() const {
-        return chainHead != NULL;
-    }
-
 private:
     pFunctionPointerWithContext_t common_add(pFunctionPointerWithContext_t pf) {
         if (chainHead == NULL) {
@@ -223,13 +139,8 @@
 
 private:
     pFunctionPointerWithContext_t chainHead;
-    // iterator during a function call, this has to be mutable because the call function is const.
-    // Note: mutable is the correct behaviour here, the iterator never leak outside the object.
-    // So the object can still be seen as logically const even if it change its internal state
-    mutable pFunctionPointerWithContext_t currentCalled;
 
-
-    /* Disallow copy constructor and assignment operators. */
+    /* disallow copy constructor and assignment operators */
 private:
     CallChainOfFunctionPointersWithContext(const CallChainOfFunctionPointersWithContext &);
     CallChainOfFunctionPointersWithContext & operator = (const CallChainOfFunctionPointersWithContext &);