HelenOS sources

INTERFACE_ADB_CB   77 uspace/drv/hid/adb-kbd/adb-kbd.c 	rc = async_create_callback_port(exch, INTERFACE_ADB_CB, 0, 0,
INTERFACE_ADB_CB  146 uspace/drv/hid/adb-mouse/adb-mouse.c 	rc = async_create_callback_port(exch, INTERFACE_ADB_CB, 0, 0,
HelenOS homepage, sources at GitHub