Improve JVS bus life cycle handling

chuniio/chuniio.c

@@ -18,7 +18,7 @@ static uint8_t chuni_io_hand_pos;
 static HANDLE chuni_io_slider_thread;
 static bool chuni_io_slider_stop_flag;
 
-HRESULT chuni_io_init(void)
+HRESULT chuni_io_jvs_init(void)
 {
     return S_OK;
 }
@@ -73,6 +73,11 @@ void chuni_io_jvs_poll(uint8_t *opbtn, uint8_t *beams)
 void chuni_io_jvs_set_coin_blocker(bool open)
 {}
 
+HRESULT chuni_io_slider_init(void)
+{
+    return S_OK;
+}
+
 void chuni_io_slider_start(chuni_io_slider_callback_t callback)
 {
     if (chuni_io_slider_thread != NULL) {

chuniio/chuniio.def

@@ -1,10 +1,11 @@
 LIBRARY chuniio
 
 EXPORTS
-    chuni_io_init
+    chuni_io_jvs_init
     chuni_io_jvs_poll
     chuni_io_jvs_read_coin_counter
     chuni_io_jvs_set_coin_blocker
+    chuni_io_slider_init
     chuni_io_slider_set_leds
     chuni_io_slider_start
     chuni_io_slider_stop

chuniio/chuniio.h

@@ -5,15 +5,15 @@
 #include <stdbool.h>
 #include <stdint.h>
 
-/* Initialize the Chunithm IO provider DLL. This is the first function to be
-   called on this DLL. Returning failure from this function will cause the
-   main application to immediately exit.
+/* Initialize JVS-based input. This function will be called before any other
+   chuni_io_jvs_*() function calls. Errors returned from this function will
+   manifest as a disconnected JVS bus.
 
    All subsequent calls may originate from arbitrary threads and some may
    overlap with each other. Ensuring synchronization inside your IO DLL is
    your responsibility. */
 
-HRESULT chuni_io_init(void);
+HRESULT chuni_io_jvs_init(void);
 
 /* Poll JVS input.
 
@@ -44,6 +44,15 @@ void chuni_io_jvs_read_coin_counter(uint16_t *total);
 
 void chuni_io_jvs_set_coin_blocker(bool open);
 
+/* Initialize touch slider emulation. This function will be called before any
+   other chuni_io_slider_*() function calls.
+
+   All subsequent calls may originate from arbitrary threads and some may
+   overlap with each other. Ensuring synchronization inside your IO DLL is
+   your responsibility. */
+
+HRESULT chuni_io_slider_init(void);
+
 /* Chunithm touch slider layout:
 
                                ^^^ Toward screen ^^^