app manager

/* here the message data structure */
typedef struct{
  int     aid;            /* application id */
  int     wfd;            /* write fd - for request */
  int     rfd;            /* read fd - for respond */
  int     efd;            /* event fd */
  int     dpi;            /* display dpi */
  char    program[256];   /* program name */
  char    param[256];     /* param */
} LART_NEW_APP_DATA;

/* application manager */
int lart_app_manager(
  LART_APP_RUN_HANDLER run_handler
){
  byte running = 1;
  int res=0;
  _lart_app_run_cb = run_handler;

  while (running){
    dword param = 0;
    voidp data  = NULL;
    size_t len  = 0;
    byte status = lart_rrecv(&param, data, &len);

    switch (status){
      case LART_ROOT_MSG_CREATE_APP:
        {
          LART_NEW_APP_RES_DATA res={0};
          res.aid = 0;
          res.pid = -1;
          if ((len==sizeof(LART_NEW_APP_DATA))&&(data)){
            LART_NEW_APP_DATA * reqapp = (LART_NEW_APP_DATA *) data;
            res.aid = reqapp->appid;
            res.pid = lart_app_create(
              reqapp->appid,
              reqapp->program,
              reqapp->param,
              reqapp->wfd,
              reqapp->rfd,
              reqapp->efd,
              reqapp->dpi
            );
            lart_rsend(
              LART_ROOT_MSG_CREATE_APP_RES,
              1 /* processed */,  &res, sizeof(LART_NEW_APP_RES_DATA)
            );
          }
          else{
            lart_rsend(
              LART_ROOT_MSG_CREATE_APP_RES,
              0, NULL, 0 /* failed - bad message */
            );
          }
        }
        break;
      case LART_ROOT_MSG_TERMINATED:
        {
          /* terminate runtime */
          running = 0;
          res = (int) param;
        }
        break;
    }

    if (len>0){
      free(data);
      data=NULL;
      len=0;
    }
  }
  return res;
}