libc/stdio: Remove the one line mutex wrapper

and call nxmutex api directly

Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>

libs/libc/libc.h

@@ -74,13 +74,6 @@ extern "C"
  * Public Function Prototypes
  ****************************************************************************/
 
-/* Defined in lib_streamsem.c */
-
-#ifdef CONFIG_FILE_STREAM
-void  lib_stream_semtake(FAR struct streamlist *list);
-void  lib_stream_semgive(FAR struct streamlist *list);
-#endif
-
 /* Defined in lib_dtoa.c */
 
 #ifdef CONFIG_LIBC_FLOATINGPOINT

libs/libc/stdio/lib_fclose.c

@@ -85,7 +85,7 @@ int fclose(FAR FILE *stream)
       /* Remove FILE structure from the stream list */
 
       slist = nxsched_get_streams();
-      lib_stream_semtake(slist);
+      nxmutex_lock(&slist->sl_lock);
 
       for (next = slist->sl_head; next; prev = next, next = next->fs_next)
         {
@@ -109,7 +109,7 @@ int fclose(FAR FILE *stream)
             }
         }
 
-      lib_stream_semgive(slist);
+      nxmutex_unlock(&slist->sl_lock);
 
       /* Check that the underlying file descriptor corresponds to an an open
        * file.

libs/libc/stdio/lib_libflushall.c

@@ -59,7 +59,7 @@ int lib_flushall(FAR struct streamlist *list)
 
       /* Process each stream in the thread's stream list */
 
-      lib_stream_semtake(list);
+      nxmutex_lock(&list->sl_lock);
 
       for (i = 0; i < 3; i++)
         {
@@ -90,7 +90,7 @@ int lib_flushall(FAR struct streamlist *list)
             }
         }
 
-      lib_stream_semgive(list);
+      nxmutex_unlock(&list->sl_lock);
     }
 
   /* If any flush failed, return the errorcode of the last failed flush */

libs/libc/stdio/lib_libstream.c

@@ -149,13 +149,3 @@ void lib_stream_release(FAR struct task_group_s *group)
 }
 
 #endif /* CONFIG_BUILD_FLAT || __KERNEL__ */
-
-void lib_stream_semtake(FAR struct streamlist *list)
-{
-  nxmutex_lock(&list->sl_lock);
-}
-
-void lib_stream_semgive(FAR struct streamlist *list)
-{
-  nxmutex_unlock(&list->sl_lock);
-}