From 3d0005b54af06d3bb7ab9f85bfe6a27552b11f74 Mon Sep 17 00:00:00 2001 From: Florian Weimer Date: Mon, 19 Dec 2022 18:56:54 +0100 Subject: [PATCH] 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 --- stdio-common/vfprintf-internal.c | 8 ++++++++ 1 file changed, 8 insertions(+) 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. */