add proper fuxed-based locking for stdio

[musl] / src / stdio / fflush.c

diff --git a/src/stdio/fflush.c b/src/stdio/fflush.c
index cdbd39b..4c1647b 100644 (file)
--- a/src/stdio/fflush.c
+++ b/src/stdio/fflush.c
@@ -22,8 +22,8 @@ static int __fflush_unlocked(FILE *f)
 }
 
 /* stdout.c will override this if linked */
-static FILE *const __dummy = 0;
-weak_alias(__dummy, __stdout_to_flush);
+static FILE *const dummy = 0;
+weak_alias(dummy, __stdout_used);
 
 int fflush(FILE *f)
 {
@@ -37,13 +37,13 @@ int fflush(FILE *f)
                return r;
        }
 
-       r = __stdout_to_flush ? fflush(__stdout_to_flush) : 0;
+       r = __stdout_used ? fflush(__stdout_used) : 0;
 
        OFLLOCK();
-       for (f=ofl_head; f; f=next) {
+       for (f=libc.ofl_head; f; f=next) {
                FLOCK(f);
                //OFLUNLOCK();
-               r |= __fflush_unlocked(f);
+               if (f->wpos > f->wbase) r |= __fflush_unlocked(f);
                //OFLLOCK();
                next = f->next;
                FUNLOCK(f);