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[v6,06/11] stdio-common: Add lock optimization to vfprintf and vfwprintf

Message ID 565edabd34f32bce1d8f90eeaa6360cabe96ba84.1671221440.git.fweimer@redhat.com
State Committed
Commit 3d0005b54af06d3bb7ab9f85bfe6a27552b11f74
Headers
Series vfprintf refactor |

Checks

Context Check Description
dj/TryBot-apply_patch success Patch applied to master at the time it was sent

Commit Message

Florian Weimer Dec. 16, 2022, 8:15 p.m. UTC 
  After the rewrite and the implicit unbuffered streams handling, this
is very straightforward to add.

Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>
---
 stdio-common/vfprintf-internal.c | 8 ++++++++
 1 file changed, 8 insertions(+)
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Patch

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.  */