[dfs_v1][elmfat] Add new mutex API functions for R0.16 compatibility

Co-authored-by: BernardXiong <1241087+BernardXiong@users.noreply.github.com>

components/dfs/dfs_v1/filesystems/elmfat/dfs_elm.c

@@ -999,6 +999,7 @@ DWORD get_fattime(void)
 }
 
 #if FF_FS_REENTRANT
+/* Old FatFs API (R0.14b and earlier) */
 int ff_cre_syncobj(BYTE drv, FF_SYNC_t *m)
 {
     char name[8];
@@ -1036,6 +1037,44 @@ void ff_rel_grant(FF_SYNC_t m)
     rt_mutex_release(m);
 }
 
+/* New FatFs API (R0.15 and later) */
+static rt_mutex_t Mutex[FF_VOLUMES + 1];
+
+int ff_mutex_create (int vol)
+{
+    char name[8];
+    rt_mutex_t mutex;
+
+    rt_snprintf(name, sizeof(name), "fat%d", vol);
+    mutex = rt_mutex_create(name, RT_IPC_FLAG_PRIO);
+    if (mutex != RT_NULL)
+    {
+        Mutex[vol] = mutex;
+        return RT_TRUE;
+    }
+
+    return RT_FALSE;
+}
+
+void ff_mutex_delete (int vol)
+{
+    if (Mutex[vol] != RT_NULL)
+        rt_mutex_delete(Mutex[vol]);
+}
+
+int ff_mutex_take (int vol)
+{
+    if (rt_mutex_take(Mutex[vol], FF_FS_TIMEOUT) == RT_EOK)
+        return RT_TRUE;
+
+    return RT_FALSE;
+}
+
+void ff_mutex_give (int vol)
+{
+    rt_mutex_release(Mutex[vol]);
+}
+
 #endif
 
 /* Memory functions */