Add futex support for compat/linux.

Based on Emmanuel Dreyfus work with additions, tricks and adaptations by me.

Lots of help and reviewing by guenther@ and oga@.

Okay guenther@.

1 files changed, 77 insertions, 0 deletions

diff --git a/sys/compat/linux/linux_futex.h b/sys/compat/linux/linux_futex.h
new file mode 100644
index 00000000000..ca1d0f35ef8
--- /dev/null
+++ b/sys/compat/linux/linux_futex.h
@@ -0,0 +1,77 @@
+/* $OpenBSD: linux_futex.h,v 1.1 2011/09/18 02:23:18 pirofti Exp $ */
+/*	$NetBSD: linux_futex.h,v 1.4 2010/07/07 01:30:35 chs Exp $ */
+
+/*-
+ * Copyright (c) 2005 Emmanuel Dreyfus, 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. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by Emmanuel Dreyfus
+ * 4. The name of the author may not be used to endorse or promote 
+ *    products derived from this software without specific prior written 
+ *    permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE 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.
+ */
+
+#ifndef _LINUX_FUTEX_H_
+#define _LINUX_FUTEX_H_
+
+#define LINUX_FUTEX_WAIT	0 
+#define LINUX_FUTEX_WAKE	1
+#define LINUX_FUTEX_FD		2
+#define LINUX_FUTEX_REQUEUE	3
+#define LINUX_FUTEX_CMP_REQUEUE	4
+#define LINUX_FUTEX_WAKE_OP	5
+
+#define LINUX_FUTEX_PRIVATE_FLAG	128
+
+#define FUTEX_OP_SET		0
+#define FUTEX_OP_ADD		1
+#define FUTEX_OP_OR		2
+#define FUTEX_OP_ANDN		3
+#define FUTEX_OP_XOR		4
+
+#define FUTEX_OP_OPARG_SHIFT	8
+
+#define FUTEX_OP_CMP_EQ		0
+#define FUTEX_OP_CMP_NE		1
+#define FUTEX_OP_CMP_LT		2
+#define FUTEX_OP_CMP_LE		3
+#define FUTEX_OP_CMP_GT		4
+#define FUTEX_OP_CMP_GE		5
+
+struct linux_robust_list {
+	struct linux_robust_list	*next;
+};
+
+struct linux_robust_list_head {
+	struct linux_robust_list	list;
+	unsigned long			futex_offset;
+	struct linux_robust_list	*pending_list;
+};
+
+#define FUTEX_WAITERS		0x80000000
+#define FUTEX_OWNER_DIED	0x40000000
+#define FUTEX_TID_MASK		0x3fffffff
+
+
+#endif /* !_LINUX_FUTEX_H_ */