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authorriastradh <riastradh@NetBSD.org>2021-12-19 01:37:27 +0000
committerriastradh <riastradh@NetBSD.org>2021-12-19 01:37:27 +0000
commit136db9ec84df8ffd5a9854e58985f8d132d6875a (patch)
tree6e39496266060763c736fa88211e0e72bbbe22b3 /sys/external/bsd/common/include/linux
parent0223d4f4d6667cc6b99444fa42cc2b1eb31f483a (diff)
Move Linux SRCU to common.
Diffstat (limited to 'sys/external/bsd/common/include/linux')
-rw-r--r--sys/external/bsd/common/include/linux/srcu.h59
1 files changed, 59 insertions, 0 deletions
diff --git a/sys/external/bsd/common/include/linux/srcu.h b/sys/external/bsd/common/include/linux/srcu.h
new file mode 100644
index 00000000000..446cc7a5c65
--- /dev/null
+++ b/sys/external/bsd/common/include/linux/srcu.h
@@ -0,0 +1,59 @@
+/* $NetBSD: srcu.h,v 1.1 2021/12/19 01:37:27 riastradh Exp $ */
+
+/*-
+ * Copyright (c) 2018 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Taylor R. Campbell.
+ *
+ * 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
+ */
+
+#ifndef _LINUX_SRCU_H_
+#define _LINUX_SRCU_H_
+
+#include <sys/types.h>
+#include <sys/condvar.h>
+#include <sys/mutex.h>
+
+struct lwp;
+struct percpu;
+
+struct srcu {
+ struct percpu *srcu_percpu; /* struct srcu_cpu */
+ kmutex_t srcu_lock;
+ kcondvar_t srcu_cv;
+ struct lwp *srcu_sync;
+ int64_t srcu_total;
+ volatile unsigned srcu_gen;
+};
+
+void srcu_init(struct srcu *, const char *);
+void srcu_fini(struct srcu *);
+
+int srcu_read_lock(struct srcu *);
+void srcu_read_unlock(struct srcu *, int);
+
+void synchronize_srcu(struct srcu *);
+
+#endif /* _LINUX_SRCU_H_ */