merge from gcc

1 files changed, 17 insertions, 1 deletions

diff --git a/libiberty/fopen_unlocked.c b/libiberty/fopen_unlocked.c
index 8f9f300d101..84e3be54b28 100644
--- a/libiberty/fopen_unlocked.c
+++ b/libiberty/fopen_unlocked.c
@@ -28,6 +28,14 @@ pointer unchanged.  If the @var{stream} is @code{NULL} do nothing.
 
 @end deftypefn
 
+@deftypefn Extension void unlock_std_streams (void)
+
+If the OS supports it, ensure that the standard I/O streams,
+@code{stdin}, @code{stdout} and @code{stderr} are setup to avoid any
+multi-threaded locking.  Otherwise do nothing.
+
+@end deftypefn
+
 @deftypefn Extension FILE * fopen_unlocked (const char *@var{path}, const char * @var{mode})
 
 Opens and returns a @code{FILE} pointer via @code{fopen}.  If the
@@ -80,11 +88,19 @@ unlock_1 (FILE *const fp ATTRIBUTE_UNUSED)
 }
 
 void
-unlock_stream(FILE *fp)
+unlock_stream (FILE *fp)
 {
   unlock_1 (fp);
 }
 
+void
+unlock_std_streams (void)
+{
+  unlock_1 (stdin);
+  unlock_1 (stdout);
+  unlock_1 (stderr);
+}
+
 FILE *
 fopen_unlocked (const char *path, const char *mode)		
 {