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Avoid calling a NULL function pointer. #8

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Avoid calling a NULL function pointer. #8

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6 changes: 5 additions & 1 deletion pigpio_functions.h
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Original file line number Diff line number Diff line change
Expand Up @@ -20,7 +20,11 @@ static inline int hw_getInterruptPin() {

static inline void hw_callInterrupt(uint32_t tick) {
_lastmic = tick;
_hw_interruptCallback();
/* Avoid calling NULL pointer because gpioSetAlertFunc()
* is called in rfcontrol_command_receive() before this
* callback gets assigned by hw_attachInterrupt()
* in RFControl::startReceiving() */
if(_hw_interruptCallback) _hw_interruptCallback();
}


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