svn commit: r245596 - projects/counters/sys/i386/include

[Konstantin Belousov]

Author: kib
Date: Fri Jan 18 10:11:54 2013
New Revision: 245596
URL: http://svnweb.freebsd.org/changeset/base/245596

Log:
  Add slow implementation of the dynamic per-cpu counters for i386.
  It will be used for all other architectures as well for now.

Added:
  projects/counters/sys/i386/include/counter.h   (contents, props changed)

Added: projects/counters/sys/i386/include/counter.h
==============================================================================
--- /dev/null	00:00:00 1970	(empty, because file is newly added)
+++ projects/counters/sys/i386/include/counter.h	Fri Jan 18 10:11:54 2013	(r245596)
@@ -0,0 +1,55 @@
+/*-
+ * Copyright (c) 2012 Konstantin Belousov <kib at FreeBSD.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the author nor the names of any co-contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
+
+#ifndef __MACHINE_COUNTER_H__
+#define __MACHINE_COUNTER_H__
+
+#include <sys/pcpu.h>
+
+static __inline void
+counter_u64_inc(counter_u64_t c, uint64_t inc)
+{
+
+	critical_enter();
+	*(uint64_t *)((char *)c + sizeof(struct pcpu) * curcpu) += inc;
+	critical_leave();
+}
+
+static __inline void
+counter_u64_dec(counter_u64_t c, uint64_t dec)
+{
+
+	critical_enter();
+	*(uint64_t *)((char *)c + sizeof(struct pcpu) * curcpu) -= inc;
+	critical_leave();
+}
+
+#endif	/* ! __MACHINE_COUNTER_H__ */