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+/* Definitions for BSD-style memory management.
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+ Copyright (C) 1994-1998,2000,01 Free Software Foundation, Inc.
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+ This file is part of the GNU C Library.
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+
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+ The GNU C Library is free software; you can redistribute it and/or
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+ modify it under the terms of the GNU Lesser General Public
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+ License as published by the Free Software Foundation; either
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+ version 2.1 of the License, or (at your option) any later version.
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+
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+ The GNU C Library is distributed in the hope that it will be useful,
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+ but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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+ Lesser General Public License for more details.
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+
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+ You should have received a copy of the GNU Lesser General Public
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+ License along with the GNU C Library; if not, write to the Free
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+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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+ 02111-1307 USA. */
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+
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+/* These are the bits used by 4.4 BSD and its derivatives. On systems
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+ (such as GNU) where these facilities are not system services but can be
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+ emulated in the C library, these are the definitions we emulate. */
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+
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+#ifndef _SYS_MMAN_H
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+# error "Never use <bits/mman.h> directly; include <sys/mman.h> instead."
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+#endif
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+
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+/* Protections are chosen from these bits, OR'd together. The
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+ implementation does not necessarily support PROT_EXEC or PROT_WRITE
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+ without PROT_READ. The only guarantees are that no writing will be
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+ allowed without PROT_WRITE and no access will be allowed for PROT_NONE. */
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+
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+#define PROT_NONE 0x00 /* No access. */
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+#define PROT_READ 0x01 /* Pages can be read. */
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+#define PROT_WRITE 0x02 /* Pages can be written. */
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+#define PROT_EXEC 0x04 /* Pages can be executed. */
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+
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+/* Sharing types (must choose one and only one of these). */
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+#define MAP_SHARED 0x01 /* Share changes. */
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+#define MAP_PRIVATE 0x02 /* Changes are private. */
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+#ifdef __USE_MISC
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+# define MAP_TYPE 0x0f /* Mask for type of mapping. */
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+#endif
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+
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+/* Other flags. */
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+#define MAP_FIXED 0x10 /* Interpret addr exactly. */
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+#ifdef __USE_MISC
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+# define MAP_FILE 0
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+# define MAP_ANONYMOUS 0x20 /* Don't use a file. */
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+# define MAP_ANON MAP_ANONYMOUS
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+#endif
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+
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+/* These are Linux-specific. */
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+#ifdef __USE_MISC
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+# define MAP_GROWSDOWN 0x0100 /* Stack-like segment. */
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+# define MAP_DENYWRITE 0x0800 /* ETXTBSY */
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+# define MAP_EXECUTABLE 0x1000 /* Mark it as an executable. */
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+# define MAP_LOCKED 0x2000 /* Lock the mapping. */
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+# define MAP_NORESERVE 0x4000 /* Don't check for reservations. */
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+#endif
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+
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+/* Flags to `msync'. */
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+#define MS_ASYNC 1 /* Sync memory asynchronously. */
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+#define MS_SYNC 4 /* Synchronous memory sync. */
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+#define MS_INVALIDATE 2 /* Invalidate the caches. */
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+
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+/* Flags for `mlockall'. */
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+#define MCL_CURRENT 1 /* Lock all currently mapped pages. */
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+#define MCL_FUTURE 2 /* Lock all additions to address
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+ space. */
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+
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+/* Flags for `mremap'. */
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+#ifdef __USE_GNU
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+# define MREMAP_MAYMOVE 1
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+#endif
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