Update the Callback class to handle a NULL thunk by returning 0
rather than trying to call the thunk. This fixes a crash that occurs
on some targets when the TX uart handler is not attached.
Background:
The K64F HAL uart implementation calls the TX interrupt handler
every time a uart interrupt occurs while the TX register is empty.
It does not check to see if the TX interrupt has been enabled.
This means that the TX interrupt can and typically does get
run on RX events. This causes a crash with the newer callback
code which did not (prior to this patch) support a NULL thunk.
- Adopt C++11 style template arguments, requires rename to Callback
- Add constructor for C style callback functions
- Add constructor for Callbacks
- Add static function for passing to C style callbacks
FuncPtr provides a more flexible templated function class as a
replacement for FunctionPointer.
FuncPtr provides an intuitive template interface:
void doit(int, char *);
FuncPtr<void(int, char *)> doit_ptr(doit);
doit_ptr(10, "hi!");
FuncPtr places memory management on the user, only supporting
storing an extra pointer for pointers to externally stored objects
that can be passed to the function. Additional binding can be
supplied by an external class.
FuncPtr<void(int)> hello(&object, &Object::method);
Additionally FuncPtr provides a copy constructor, allowing FuncPtrs
themselves to be passed to existing interfaces.
FuncPtr<void()> hello(doit); ticker.attach(hello, 1000);
Russ Butler
Christopher Haster
Russ Butler
sg-
Bogdan Marinescu