Diff: api/Serial.h

Revision:

15:4892fe388435

Parent:

13:0645d8841f51

Child:

36:ab3ee77451e7

--- a/api/Serial.h	Mon Aug 05 14:54:27 2013 +0000
+++ b/api/Serial.h	Wed Aug 07 16:43:59 2013 +0300
@@ -23,6 +23,7 @@
 #include "Stream.h"
 #include "FunctionPointer.h"
 #include "serial_api.h"
+#include "CallChain.h"
 
 namespace mbed {
 
@@ -82,7 +83,7 @@
      *  @param parity The parity used (Serial::None, Serial::Odd, Serial::Even, Serial::Forced1, Serial::Forced0; default = Serial::None)
      *  @param stop The number of stop bits (1 or 2; default = 1)
      */
-    void format(int bits = 8, Parity parity=Serial::None, int stop_bits=1);
+    void format(int bits=8, Parity parity=Serial::None, int stop_bits=1);
 
     /** Determine if there is a character available to read
      *
@@ -104,23 +105,95 @@
      *
      *  @param fptr A pointer to a void function, or 0 to set as none
      *  @param type Which serial interrupt to attach the member function to (Seriall::RxIrq for receive, TxIrq for transmit buffer empty)
+     *
+     *  @returns
+     *  The function object created for 'fptr'
      */
-    void attach(void (*fptr)(void), IrqType type=RxIrq);
+    pFunctionPointer_t attach(void (*fptr)(void), IrqType type=RxIrq);
+
+    /** Add a function to be called when a serial interrupt is generated at the end of the call chain
+     *
+     *  @param fptr the function to add
+     *  @param type Which serial interrupt to attach the member function to (Seriall::RxIrq for receive, TxIrq for transmit buffer empty)
+     *
+     *  @returns
+     *  The function object created for 'fptr'
+     */
+    pFunctionPointer_t add_handler(void (*fptr)(void), IrqType type=RxIrq) {
+        return add_handler_helper(fptr, type);
+    }
+
+    /** Add a function to be called when a serial interrupt is generated at the beginning of the call chain
+     *
+     *  @param fptr the function to add
+     *  @param type Which serial interrupt to attach the member function to (Seriall::RxIrq for receive, TxIrq for transmit buffer empty)
+     *
+     *  @returns
+     *  The function object created for 'fptr'
+     */
+    pFunctionPointer_t add_handler_front(void (*fptr)(void), IrqType type=RxIrq) {
+        return add_handler_helper(fptr, type, true);
+    }
 
     /** Attach a member function to call whenever a serial interrupt is generated
      *
      *  @param tptr pointer to the object to call the member function on
      *  @param mptr pointer to the member function to be called
      *  @param type Which serial interrupt to attach the member function to (Seriall::RxIrq for receive, TxIrq for transmit buffer empty)
+     *
+     *  @param
+     *  The function object created for 'tptr' and 'mptr'
+     */
+    template<typename T>
+    pFunctionPointer_t attach(T* tptr, void (T::*mptr)(void), IrqType type=RxIrq) {
+        if((mptr != NULL) && (tptr != NULL)) {
+            _irq[type].clear();
+            pFunctionPointer_t pf = _irq[type].add(tptr, mptr);
+            serial_irq_set(&_serial, (SerialIrq)type, 1);
+            return pf;
+        }
+        else
+            return NULL;
+    }
+
+    /** Add a function to be called when a serial interrupt is generated at the end of the call chain
+     *
+     *  @param tptr pointer to the object to call the member function on
+     *  @param mptr pointer to the member function to be called
+     *  @param type Which serial interrupt to attach the member function to (Seriall::RxIrq for receive, TxIrq for transmit buffer empty)
+     *
+     *  @returns
+     *  The function object created for 'fptr'
      */
     template<typename T>
-    void attach(T* tptr, void (T::*mptr)(void), IrqType type=RxIrq) {
-        if((mptr != NULL) && (tptr != NULL)) {
-            _irq[type].attach(tptr, mptr);
-            serial_irq_set(&_serial, (SerialIrq)type, 1);
-        }
+    pFunctionPointer_t add_handler(T* tptr, void (T::*mptr)(void), IrqType type=RxIrq) {
+        return add_handler_helper(tptr, mptr, type);
     }
 
+    /** Add a function to be called when a serial interrupt is generated at the beginning of the call chain
+     *
+     *  @param tptr pointer to the object to call the member function on
+     *  @param mptr pointer to the member function to be called
+     *  @param type Which serial interrupt to attach the member function to (Seriall::RxIrq for receive, TxIrq for transmit buffer empty)
+     *
+     *  @returns
+     *  The function object created for 'fptr'
+     */
+    template<typename T>
+    pFunctionPointer_t add_handler_front(T* tptr, void (T::*mptr)(void), IrqType type=RxIrq) {
+        return add_handler_helper(tptr, mptr, type, true);
+    }
+
+    /** Remove a function from the list of functions to be called when a serial interrupt is generated
+     *
+     *  @param pf the function object to remove
+     *  @param type Which serial interrupt to attach the member function to (Seriall::RxIrq for receive, TxIrq for transmit buffer empty)
+     *
+     *  @returns
+     *  true if the function was found and removed, false otherwise
+     */
+    bool remove_handler(pFunctionPointer_t pf, IrqType type=RxIrq);
+
     /** Generate a break condition on the serial line
      */
     void send_break();
@@ -130,9 +203,21 @@
 protected:
     virtual int _getc();
     virtual int _putc(int c);
+    pFunctionPointer_t add_handler_helper(void (*function)(void), IrqType type, bool front=false);
+
+    template<typename T>
+    pFunctionPointer_t add_handler_helper(T* tptr, void (T::*mptr)(void), IrqType type, bool front=false) {
+        if ((mptr != NULL) && (tptr != NULL)) {
+            pFunctionPointer_t pf = front ? _irq[type].add_front(tptr, mptr) : _irq[type].add(tptr, mptr);
+            serial_irq_set(&_serial, (SerialIrq)type, 1);
+            return pf;
+        }
+        else
+            return NULL;
+    }
 
     serial_t        _serial;
-    FunctionPointer _irq[2];
+    CallChain       _irq[2];
     int             _baud;
 };