Author: ed
Date: Sat Jun 15 22:17:59 2013
New Revision: 251796
URL: http://svnweb.freebsd.org/changeset/base/251796
Log:
Let hastd use C11 atomics.
C11 atomics now work on all the architectures. Have at least a single
piece of software in our base system that uses C11 atomics. This
somewhat makes it less likely that we break it because of LLVM imports,
etc.
Modified:
head/sbin/hastd/refcnt.h
Modified: head/sbin/hastd/refcnt.h
==============================================================================
--- head/sbin/hastd/refcnt.h Sat Jun 15 21:29:47 2013 (r251795)
+++ head/sbin/hastd/refcnt.h Sat Jun 15 22:17:59 2013 (r251796)
@@ -32,24 +32,24 @@
#ifndef __REFCNT_H__
#define __REFCNT_H__
-#include <machine/atomic.h>
+#include <stdatomic.h>
#include "pjdlog.h"
-typedef unsigned int refcnt_t;
+typedef atomic_uint refcnt_t;
static __inline void
refcnt_init(refcnt_t *count, unsigned int v)
{
- *count = v;
+ atomic_init(count, v);
}
static __inline void
refcnt_acquire(refcnt_t *count)
{
- atomic_add_acq_int(count, 1);
+ atomic_fetch_add_explicit(count, 1, memory_order_acquire);
}
static __inline unsigned int
@@ -58,7 +58,7 @@ refcnt_release(refcnt_t *count)
unsigned int old;
/* XXX: Should this have a rel membar? */
- old = atomic_fetchadd_int(count, -1);
+ old = atomic_fetch_sub(count, 1);
PJDLOG_ASSERT(old > 0);
return (old - 1);
}
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