make midiin device pointer live in a struct

main.c

 void     alsa_error           (const char *format, ...);
 void*    midiinfunction       (void * arg);
 
+typedef struct {
+  snd_rawmidi_t* midiin;
+  snd_rawmidi_t* midiout;
+} housicIO;
+
 int main(int argc, char *argv[]) {
   int status;
   int mode = SND_RAWMIDI_SYNC;
   pthread_t midiinthread;
-  snd_rawmidi_t* midiin = NULL;
+
+  housicIO IOs = {NULL,NULL};
+  
+  //  snd_rawmidi_t* midiin = NULL;
   const char* portname = "virtual";
 
-  if ((status = snd_rawmidi_open(&midiin, NULL, portname, mode)) < 0) {
+  
+  if ((status = snd_rawmidi_open(&IOs.midiin, NULL, portname, mode)) < 0) {
     alsa_error("Problem opening MIDI input: %s", snd_strerror(status));
     exit(1);
   }
 
-  status = pthread_create(&midiinthread, NULL, midiinfunction, midiin);
+  status = pthread_create(&midiinthread, NULL, midiinfunction, &IOs);
   
   pthread_join(midiinthread, NULL);
 
-  snd_rawmidi_close(midiin);
-  midiin=NULL;
+  //snd_rawmidi_close(midiin);
+  //midiin=NULL;
   
   return 0;
 }
 //
 
 void *midiinfunction(void *arg) {
-  snd_rawmidi_t* midiin = (snd_rawmidi_t*)arg;
+  housicIO* IOs = (housicIO*)arg;
+  snd_rawmidi_t* midiin = IOs->midiin;
   int status;
   int i = 0;
   char buffer[3];