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-rw-r--r--src/stdio/putc.h10
1 files changed, 5 insertions, 5 deletions
diff --git a/src/stdio/putc.h b/src/stdio/putc.h
index a37937e8..2014c4ec 100644
--- a/src/stdio/putc.h
+++ b/src/stdio/putc.h
@@ -4,9 +4,9 @@
#ifdef __GNUC__
__attribute__((__noinline__))
#endif
-static int locking_putc(int c, FILE *f, int tid)
+static int locking_putc(int c, FILE *f)
{
- if (a_cas(&f->lock, 0, tid)) __lockfile(f);
+ if (a_cas(&f->lock, 0, MAYBE_WAITERS-1)) __lockfile(f);
c = putc_unlocked(c, f);
if (a_swap(&f->lock, 0) & MAYBE_WAITERS)
__wake(&f->lock, 1, 1);
@@ -15,8 +15,8 @@ static int locking_putc(int c, FILE *f, int tid)
static inline int do_putc(int c, FILE *f)
{
- int tid, l = f->lock;
- if (l < 0 || (l & ~MAYBE_WAITERS) == (tid=__pthread_self()->tid))
+ int l = f->lock;
+ if (l < 0 || l && (l & ~MAYBE_WAITERS) == __pthread_self()->tid)
return putc_unlocked(c, f);
- return locking_putc(c, f, tid);
+ return locking_putc(c, f);
}