From 294dd0b86b1484aec7549663aff5b19c98a4b7fd Mon Sep 17 00:00:00 2001
From: David 'Digit' Turner <digit@google.com>
Date: Fri, 12 Feb 2010 12:18:37 -0800
Subject: Fix sem_trywait() implementation + update changelog.

---
 libc/bionic/semaphore.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

(limited to 'libc/bionic/semaphore.c')

diff --git a/libc/bionic/semaphore.c b/libc/bionic/semaphore.c
index 0c94600..f4eebce 100644
--- a/libc/bionic/semaphore.c
+++ b/libc/bionic/semaphore.c
@@ -196,7 +196,8 @@ int  sem_trywait(sem_t *sem)
     if (__atomic_dec_if_positive(&sem->count) > 0) {
         return 0;
     } else {
-        return EAGAIN;
+        errno = EAGAIN;
+        return -1;
     }
 }
 
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