Merge pull request 'Added SetQuitHandler syscall into gint' (#21) from mibi88/gint:dev into dev

Reviewed-on: https://gitea.planet-casio.com/Lephenixnoir/gint/pulls/21

README.md

@@ -32,7 +32,7 @@ The library also offers powerful higher-level features:
 
 * An enhanced version of the system's GetKey() and GetKeyWait()
 * A gray engine that works by rapidly swapping monochrome images on fx-9860G II
-* Blazingly fast rendering functions (image rendering is 10 times faster tha
+* Blazingly fast rendering functions (image rendering is 10 times faster than
   MonochromeLib)
 * Integrated font management
 

include/gint/gint.h

@@ -109,6 +109,16 @@ static GINLINE void *gint_inthandler(int code, void const *h, size_t size) {
    Returns the return value of the callback. */
 extern int (*gint_inth_callback)(gint_call_t const *call);
 
+/* gint_set_quit_handler(): Call a GINT_CALL when the user open another add-in
+   
+   This function use the SetQuitHandler syscall to call a function when the
+   user open another add-in.
+
+   @call  A GINT_CALL
+   @do_world_switch  1 to execute @call in a world_switch. */
+
+void gint_set_quit_handler(gint_call_t gcall, bool do_world_switch);
+
 #ifdef __cplusplus
 }
 #endif

src/kernel/osmenu.c

@@ -13,6 +13,7 @@ int   __GetKeyWait(int *col,int *row,int type,int time,int menu,uint16_t *key);
 void  __ClearKeyBuffer(void); /* ? */
 void *__GetVRAMAddress(void);
 void  __ConfigureStatusArea(int mode);
+void __SetQuitHandler(void (*callback)(void));
 
 static int __osmenu_id;
 
@@ -76,3 +77,28 @@ void gint_osmenu(void)
 {
 	gint_world_switch(GINT_CALL(gint_osmenu_native));
 }
+
+static gint_call_t __gcall;
+static bool __do_world_switch;
+
+static void __handler()
+{
+	if(__do_world_switch){
+		gint_call(__gcall);
+	}else{
+		/* TODO: quit the world switch */
+		gint_call(__gcall);
+	}
+}
+
+static void __sethandler()
+{
+	__SetQuitHandler((void *)__handler);
+}
+
+void gint_set_quit_handler(gint_call_t gcall, bool do_world_switch)
+{
+	__gcall = gcall;
+	__do_world_switch = do_world_switch;
+	gint_world_switch(GINT_CALL(__sethandler));
+}

src/kernel/syscalls.S

@@ -42,6 +42,7 @@
 .global ___ClearKeyBuffer
 .global ___GetVRAMAddress
 .global ___ConfigureStatusArea
+.global ___SetQuitHandler
 
 #define syscall_(id, syscall_table)	\
 	mov.l	syscall_table, r2	;\
@@ -111,6 +112,8 @@ ___ClearKeyBuffer:
 	syscall(0x241)
 ___GetVRAMAddress:
 	syscall(0x135)
+___SetQuitHandler:
+	syscall(0x494)
 
 syscall_table:
 	.long	0x80010070
@@ -178,6 +181,8 @@ ___GetVRAMAddress:
 	syscall(0x1e6)
 ___ConfigureStatusArea:
 	syscall(0x2b7)
+___SetQuitHandler:
+	syscall(0x1e6e)
 
 .global ___SpecialMatrixCodeProcessing
 ___SpecialMatrixCodeProcessing: