Updated APT_CheckNew3DS to only use the APT cmds once(which also now calls aptOpenSession/aptCloseSession), then store the output value in a flag which is then used for all future APT_CheckNew3DS calls. Updated HID init/shutdown code to automatically call irrst init/shutdown code when running on new3ds. Updated irrst init code to only do init when it wasn't already initialized, likewise for the irrst shutdown code.

libctru/include/3ds/services/apt.h

@@ -69,7 +69,7 @@ Result APT_PrepareToCloseApplication(Handle* handle, u8 a);
 Result APT_CloseApplication(Handle* handle, u32 a, u32 b, u32 c);
 Result APT_SetAppCpuTimeLimit(Handle* handle, u32 percent);
 Result APT_GetAppCpuTimeLimit(Handle* handle, u32 *percent);
-Result APT_CheckNew3DS_Application(Handle* handle, u8 *out);//*Application and *System use APT commands 0x01010000 and 0x01020000. Using APT_CheckNew3DS() is recommended, this determines which of those two funcs to use automatically.
+Result APT_CheckNew3DS_Application(Handle* handle, u8 *out);//*Application and *System use APT commands 0x01010000 and 0x01020000. Using APT_CheckNew3DS() is recommended, this determines which of those two funcs to use automatically. When this is first called(this calls aptOpenSession/aptCloseSession internally), this initializes an internal flag, which is then used for the out val for all future calls.
 Result APT_CheckNew3DS_System(Handle* handle, u8 *out);
 Result APT_CheckNew3DS(Handle* handle, u8 *out);
 

libctru/source/services/apt.c

@@ -17,6 +17,9 @@ NS_APPID currentAppId;
 static char *__apt_servicestr = NULL;
 static char *__apt_servicenames[3] = {"APT:U", "APT:S", "APT:A"};
 
+static u32 __apt_new3dsflag_initialized = 0;
+static u8 __apt_new3dsflag = 0;
+
 Handle aptLockHandle;
 Handle aptuHandle;
 Handle aptEvents[3];
@@ -838,7 +841,22 @@ Result APT_CheckNew3DS_System(Handle* handle, u8 *out)
 
 Result APT_CheckNew3DS(Handle* handle, u8 *out)
 {
-	if(currentAppId==APPID_APPLICATION)return APT_CheckNew3DS_Application(NULL, out);
-	return APT_CheckNew3DS_System(NULL, out);
+	Result ret=0;
+
+	if(__apt_new3dsflag_initialized)
+	{
+		*out = __apt_new3dsflag;
+		return 0;
+	}
+
+	aptOpenSession();
+	if(currentAppId==APPID_APPLICATION)ret = APT_CheckNew3DS_Application(NULL, out);
+	ret = APT_CheckNew3DS_System(NULL, out);
+	aptCloseSession();
+
+	__apt_new3dsflag_initialized = 1;
+	__apt_new3dsflag = *out;
+
+	return ret;
 }
 

libctru/source/services/hid.c

@@ -21,6 +21,8 @@ static angularRate gRate;
 
 Result hidInit(u32* sharedMem)
 {
+	u8 val=0;
+
 	if(!sharedMem)sharedMem=(u32*)HID_SHAREDMEM_DEFAULT;
 	Result ret=0;
 
@@ -34,9 +36,16 @@ Result hidInit(u32* sharedMem)
 	hidSharedMem=sharedMem;
 	if((ret=svcMapMemoryBlock(hidMemHandle, (u32)hidSharedMem, MEMPERM_READ, 0x10000000)))goto cleanup2;
 
+	APT_CheckNew3DS(NULL, &val);
+
+	if(val)
+	{
+		ret = irrstInit(NULL);
+	}
+
 	// Reset internal state.
 	kOld = kHeld = kDown = kUp = 0;
-	return 0;
+	return ret;
 
 cleanup2:
 	svcCloseHandle(hidMemHandle);
@@ -48,10 +57,18 @@ cleanup1:
 void hidExit()
 {
 	// Unmap HID sharedmem and close handles.
+	u8 val=0;
 	int i; for(i=0; i<5; i++)svcCloseHandle(hidEvents[i]);
 	svcUnmapMemoryBlock(hidMemHandle, (u32)hidSharedMem);
 	svcCloseHandle(hidMemHandle);
 	svcCloseHandle(hidHandle);
+
+	APT_CheckNew3DS(NULL, &val);
+
+	if(val)
+	{
+		irrstExit();
+	}
 }
 
 void hidWaitForEvent(HID_Event id, bool nextEvent)

libctru/source/services/irrst.c

@@ -17,6 +17,8 @@ static bool irrstUsed = false;
 
 Result irrstInit(u32* sharedMem)
 {
+	if(irrstUsed)return 0;
+
 	if(!sharedMem)sharedMem=(u32*)IRRST_SHAREDMEM_DEFAULT;
 	Result ret=0;
 
@@ -44,6 +46,8 @@ cleanup1:
 
 void irrstExit()
 {
+	if(!irrstUsed)return;
+
 	irrstUsed = false;
 	svcCloseHandle(irrstEvent);
 	// Unmap ir:rst sharedmem and close handles.