1 files changed, 52 insertions, 0 deletions
diff --git a/hurd/sysvshm.h b/hurd/sysvshm.h
new file mode 100644
index 0000000000..8b9c29ff46
--- /dev/null
+++ b/hurd/sysvshm.h
@@ -0,0 +1,52 @@
+/* SysV shared memory for Hurd.
+   Copyright (C) 2005-2015 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#ifndef _HURD_SYSVSHM_H
+#define _HURD_SYSVSHM_H
+
+#include <paths.h>
+#include <hurd.h>
+
+/* The area (from top to bottom) that is used for private keys.  These
+   are all keys that have the second highest bit set.  */
+#define SHM_PRIV_KEY_START	INT_MAX
+#define SHM_PRIV_KEY_END	((INT_MAX / 2) + 1)
+
+#define SHM_PREFIX		"sysvshm-"
+#define SHM_DIR			_PATH_DEV "shm/"
+
+/* The maximum number of characters in a shared memory segment file name.
+   32 is the max number of characters in a 128 bit number in hex.  */
+#if __WORDSIZE > 128
+#error Need to increase SHM_NAMEMAX.
+#else
+#define SHM_NAMEMAX (sizeof (SHM_PREFIX) - 1 + 32 + 1)
+#endif
+
+/* Use this with printf and its variants.  */
+#define SHM_NAMEPRI SHM_PREFIX "%0x"
+
+
+/* Adds a segment attachment.  */
+error_t __sysvshm_add (void *addr, size_t size);
+
+/* Removes a segment attachment.  On success, returns 0 and sets *SIZE to its
+   size. Returns EINVAL if not found.  */
+error_t __sysvshm_remove (void *addr, size_t *size);
+
+#endif /* sysvshm.h */