1 files changed, 68 insertions, 0 deletions
diff --git a/usr/src/uts/common/sys/eventfd.h b/usr/src/uts/common/sys/eventfd.h
new file mode 100644
index 0000000000..1b0d961b0b
--- /dev/null
+++ b/usr/src/uts/common/sys/eventfd.h
@@ -0,0 +1,68 @@
+/*
+ * This file and its contents are supplied under the terms of the
+ * Common Development and Distribution License ("CDDL"), version 1.0.
+ * You may only use this file in accordance with the terms of version
+ * 1.0 of the CDDL.
+ *
+ * A full copy of the text of the CDDL should have accompanied this
+ * source.  A copy of the CDDL is also available via the Internet at
+ * http://www.illumos.org/license/CDDL.
+ */
+
+/*
+ * Copyright (c) 2015 Joyent, Inc.  All rights reserved.
+ */
+
+/*
+ * Header file to support for the eventfd facility.  Note that this facility
+ * is designed to be binary compatible with the Linux eventfd facility; values
+ * for constants here should therefore exactly match those found in Linux, and
+ * this facility shouldn't be extended independently of Linux.
+ */
+
+#ifndef _SYS_EVENTFD_H
+#define	_SYS_EVENTFD_H
+
+#include <sys/types.h>
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+typedef uint64_t eventfd_t;
+
+/*
+ * To assure binary compatibility with Linux, these values are fixed at their
+ * Linux equivalents, not their native ones.
+ */
+#define	EFD_CLOEXEC		02000000		/* LX_O_CLOEXEC */
+#define	EFD_NONBLOCK		04000			/* LX_O_NONBLOCK */
+#define	EFD_SEMAPHORE		1
+
+/*
+ * These ioctl values are specific to the native implementation; applications
+ * shouldn't be using them directly, and they should therefore be safe to
+ * change without breaking apps.
+ */
+#define	EVENTFDIOC		(('e' << 24) | ('f' << 16) | ('d' << 8))
+#define	EVENTFDIOC_SEMAPHORE	(EVENTFDIOC | 1)	/* toggle sem state */
+
+#ifndef _KERNEL
+
+extern int eventfd(unsigned int, int);
+extern int eventfd_read(int, eventfd_t *);
+extern int eventfd_write(int, eventfd_t);
+
+#else
+
+#define	EVENTFDMNRN_EVENTFD	0
+#define	EVENTFDMNRN_CLONE	1
+#define	EVENTFD_VALMAX		(ULLONG_MAX - 1ULL)
+
+#endif /* _KERNEL */
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif	/* _SYS_EVENTFD_H */