3.3.2.3 GPIO Pin Locking

int IndoorTouch.GPIOLock(int pin);

Pin is the PIN index, refer to 3.3.2.1 GPIO Pin Reading. Locks the PIN against use with the active process. Another process can read the value but the setting ends with RC_ERR_LOCKED.
The return value is as follows:

• IndoorTouch.RC_OK = 0;
• IndoorTouch.RC_ERR_CONN = -1; API daemon connection error
• IndoorTouch.RC_ERR_LOCKED = -8; already locked by another process via GPIOLock