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Diffstat (limited to 'sys/compat/linuxkpi/common/include/linux/semaphore.h')
-rw-r--r--sys/compat/linuxkpi/common/include/linux/semaphore.h69
1 files changed, 69 insertions, 0 deletions
diff --git a/sys/compat/linuxkpi/common/include/linux/semaphore.h b/sys/compat/linuxkpi/common/include/linux/semaphore.h
new file mode 100644
index 000000000000..022a0164840f
--- /dev/null
+++ b/sys/compat/linuxkpi/common/include/linux/semaphore.h
@@ -0,0 +1,69 @@
+/*-
+ * Copyright (c) 2010 Isilon Systems, Inc.
+ * Copyright (c) 2010 iX Systems, Inc.
+ * Copyright (c) 2010 Panasas, Inc.
+ * Copyright (c) 2013, 2014 Mellanox Technologies, Ltd.
+ * 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 unmodified, 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 AUTHOR ``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 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 _LINUX_SEMAPHORE_H_
+#define _LINUX_SEMAPHORE_H_
+
+#include <sys/param.h>
+#include <sys/lock.h>
+#include <sys/sema.h>
+
+/*
+ * XXX BSD semaphores are disused and slow. They also do not provide a
+ * sema_wait_sig method. This must be resolved eventually.
+ */
+struct semaphore {
+ struct sema sema;
+};
+
+#define down(_sem) sema_wait(&(_sem)->sema)
+#define down_interruptible(_sem) sema_wait(&(_sem)->sema), 0
+#define down_trylock(_sem) !sema_trywait(&(_sem)->sema)
+#define up(_sem) sema_post(&(_sem)->sema)
+
+static inline void
+linux_sema_init(struct semaphore *sem, int val)
+{
+
+ memset(&sem->sema, 0, sizeof(sem->sema));
+ sema_init(&sem->sema, val, "lnxsema");
+}
+
+static inline void
+init_MUTEX(struct semaphore *sem)
+{
+
+ memset(&sem->sema, 0, sizeof(sem->sema));
+ sema_init(&sem->sema, 1, "lnxsema");
+}
+
+#define sema_init linux_sema_init
+
+#endif /* _LINUX_SEMAPHORE_H_ */