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stdio-common: Add lock optimization to vfprintf and vfwprintf

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After the rewrite and the implicit unbuffered streams handling, this
is very straightforward to add.

Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>
This commit is contained in:
Florian Weimer 2022-12-19 18:56:54 +01:00
parent e88b9f0e5c
commit 3d0005b54a
1 changed files with 8 additions and 0 deletions
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8
stdio-common/vfprintf-internal.c
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@ -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. */