From: Rich Felker <dalias@aerifal.cx>
Date: Thu, 17 Mar 2011 17:17:15 +0000 (-0400)
Subject: reorder mutex struct fields to make room for pointers (upcoming robust mutexes)
X-Git-Tag: v0.7.1~6
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=93cc986ab37b14f8c6b624439ce2a2beca7b3cf7;p=musl

reorder mutex struct fields to make room for pointers (upcoming robust mutexes)

the layout has been chosen so that pointer slots 3 and 4 fit between
the integer slots on 32-bit archs, and come after the integer slots on
64-bit archs.
---

diff --git a/src/internal/pthread_impl.h b/src/internal/pthread_impl.h
index 102413f5..9d56e8fa 100644
--- a/src/internal/pthread_impl.h
+++ b/src/internal/pthread_impl.h
@@ -47,7 +47,9 @@ struct pthread {
 #define _m_type __u.__i[0]
 #define _m_lock __u.__i[1]
 #define _m_waiters __u.__i[2]
-#define _m_count __u.__i[4]
+#define _m_prev __u.__p[3]
+#define _m_next __u.__p[4]
+#define _m_count __u.__i[5]
 #define _c_block __u.__i[0]
 #define _c_clock __u.__i[1]
 #define _rw_wrlock __u.__i[0]