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py: Add MICROPY_KBD_EXCEPTION config option to provide mp_kbd_exception.

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Defining and initialising mp_kbd_exception is boiler-plate code and so the
core runtime can provide it, instead of each port needing to do it
themselves.

The exception object is placed in the VM state rather than on the heap.
This commit is contained in:
Damien George
2016-12-15 13:00:19 +11:00
parent 979ab4e126
commit 7f1da0a03b
3 changed files with 19 additions and 0 deletions
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9
py/runtime.c
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@@ -68,6 +68,15 @@ void mp_init(void) {
mp_init_emergency_exception_buf();
#endif
#if MICROPY_KBD_EXCEPTION
// initialise the exception object for raising KeyboardInterrupt
MP_STATE_VM(mp_kbd_exception).base.type = &mp_type_KeyboardInterrupt;
MP_STATE_VM(mp_kbd_exception).traceback_alloc = 0;
MP_STATE_VM(mp_kbd_exception).traceback_len = 0;
MP_STATE_VM(mp_kbd_exception).traceback_data = NULL;
MP_STATE_VM(mp_kbd_exception).args = mp_const_empty_tuple;
#endif
// call port specific initialization if any
#ifdef MICROPY_PORT_INIT_FUNC
MICROPY_PORT_INIT_FUNC;