Improve JVS bus life cycle handling

divaio/divaio.c

@@ -14,7 +14,7 @@ static uint16_t diva_io_coins;
 static HANDLE diva_io_slider_thread;
 static bool diva_io_slider_stop_flag;
 
-HRESULT diva_io_init(void)
+HRESULT diva_io_jvs_init(void)
 {
     return S_OK;
 }
@@ -68,6 +68,11 @@ void diva_io_jvs_read_coin_counter(uint16_t *out)
 void diva_io_jvs_set_coin_blocker(bool open)
 {}
 
+HRESULT diva_io_slider_init(void)
+{
+    return S_OK;
+}
+
 void diva_io_slider_start(diva_io_slider_callback_t callback)
 {
     if (diva_io_slider_thread != NULL) {

divaio/divaio.def

@@ -1,10 +1,11 @@
 LIBRARY divaio
 
 EXPORTS
-    diva_io_init
+    diva_io_jvs_init
     diva_io_jvs_poll
     diva_io_jvs_read_coin_counter
     diva_io_jvs_set_coin_blocker
+    diva_io_slider_init
     diva_io_slider_set_leds
     diva_io_slider_start
     diva_io_slider_stop

divaio/divaio.h

@@ -5,15 +5,15 @@
 #include <stdbool.h>
 #include <stdint.h>
 
-/* Initialize the Project Diva 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
+   diva_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 diva_io_init(void);
+HRESULT diva_io_jvs_init(void);
 
 /* Poll JVS input.
 
@@ -38,6 +38,15 @@ void diva_io_jvs_read_coin_counter(uint16_t *out);
 
 void diva_io_jvs_set_coin_blocker(bool open);
 
+/* Initialize touch slider emulation. This function will be called before any
+   other diva_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 diva_io_slider_init(void);
+
 /* Project Diva touch sliders consist of 32 pressure sensitive cells, where
    cell 1 (array index 0) is the rightmost cell and cell 32 (array index 31) is
    the leftmost cell. */