From 0686d5e26fd1949fbfd33a2441f750791bc87091 Mon Sep 17 00:00:00 2001
From: Calin Juravle <calin@google.com>
Date: Tue, 6 May 2014 16:24:27 +0100
Subject: [PATCH] Reserve some space in sem_t for the future.

Reserve 12 more bytes in sem_t to give room for future implementation
improvements. This gets us to a 16 bytes sem_t. Glibc uses 32 bytes (16
actual use + 16 reserved), while OpenBSD has 16 bytes (out of which 4
are for padding).

Bug: 14587103
Bug: 12875898
Change-Id: Id835cc5abf874c651e6b5ad5b8f29c9d6ab08d5a
---
 libc/include/semaphore.h | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/libc/include/semaphore.h b/libc/include/semaphore.h
index 30e31239a..7ae3c3a75 100644
--- a/libc/include/semaphore.h
+++ b/libc/include/semaphore.h
@@ -33,10 +33,13 @@
 __BEGIN_DECLS
 
 typedef struct {
-    volatile unsigned int  count;
+  volatile unsigned int count;
+#ifdef __LP64__
+  int __reserved[3];
+#endif
 } sem_t;
 
-#define  SEM_FAILED  NULL
+#define SEM_FAILED NULL
 
 extern int sem_init(sem_t *sem, int pshared, unsigned int value);
 
-- 
2.11.0