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authorFlorian Weimer <fweimer@redhat.com>2022-12-19 18:56:54 +0100
committerFlorian Weimer <fweimer@redhat.com>2022-12-19 18:56:54 +0100
commit3d0005b54af06d3bb7ab9f85bfe6a27552b11f74 (patch)
tree109090dd8f31b4f373605342275e436279191d4c /stdio-common
parente88b9f0e5cc50cab57a299dc7efe1a4eb385161d (diff)
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stdio-common: Add lock optimization to vfprintf and vfwprintf
After the rewrite and the implicit unbuffered streams handling, this
is very straightforward to add.

Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>
Diffstat (limited to 'stdio-common')
-rw-r--r--stdio-common/vfprintf-internal.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/stdio-common/vfprintf-internal.c b/stdio-common/vfprintf-internal.c
index 83a6aea510..23ada8d0ff 100644
--- a/stdio-common/vfprintf-internal.c
+++ b/stdio-common/vfprintf-internal.c
@@ -1452,6 +1452,14 @@ vfprintf (FILE *s, const CHAR_T *format, va_list ap, unsigned int mode_flags)
     return EOF;
 #endif
 
+  if (!_IO_need_lock (s))
+    {
+      struct Xprintf (buffer_to_file) wrap;
+      Xprintf (buffer_to_file_init) (&wrap, s);
+      Xprintf_buffer (&wrap.base, format, ap, mode_flags);
+      return Xprintf (buffer_to_file_done) (&wrap);
+    }
+
   int done;
 
   /* Lock stream.  */