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author | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2008-09-12 15:54:20 +0000 |
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committer | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2008-09-12 15:54:20 +0000 |
commit | 725491fe0e537bfee94f143d5e6162a65d9bfaf4 (patch) | |
tree | 4fbcec88e1f2405098e9585494b3ed25a9b52a7a /nuttx/include | |
parent | a5f37cc14a8d0134153cb52bce522868cfd83e9d (diff) | |
download | px4-nuttx-725491fe0e537bfee94f143d5e6162a65d9bfaf4.tar.gz px4-nuttx-725491fe0e537bfee94f143d5e6162a65d9bfaf4.tar.bz2 px4-nuttx-725491fe0e537bfee94f143d5e6162a65d9bfaf4.zip |
Add mmap() API
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@916 42af7a65-404d-4744-a932-0658087f49c3
Diffstat (limited to 'nuttx/include')
-rw-r--r-- | nuttx/include/sys/mman.h | 108 |
1 files changed, 108 insertions, 0 deletions
diff --git a/nuttx/include/sys/mman.h b/nuttx/include/sys/mman.h new file mode 100644 index 000000000..9a140011c --- /dev/null +++ b/nuttx/include/sys/mman.h @@ -0,0 +1,108 @@ +/**************************************************************************** + * include/sys/mman.h + * + * Copyright (C) 2008 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <spudmonkey@racsa.co.cr> + * + * 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. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 + * COPYRIGHT OWNER 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 __SYS_MMAN_H +#define __SYS_MMAN_H + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include <nuttx/config.h> +#include <sys/types.h> + +/**************************************************************************** + * Pre-Processor Definitions + ****************************************************************************/ + +/* Protections are chosen from these bits, OR'd together. NuttX does not + * support any of these, but are provided for source level compatibility + */ + +#define PROT_NONE 0x0 /* Page may not be accessed */ +#define PROT_READ 0x1 /* Page may be read */ +#define PROT_WRITE 0x2 /* Page may be written */ +#define PROT_EXEC 0x4 /* Page may be executed */ + +/* Sharing types -- ignored by NuttX. */ + +#define MAP_SHARED 0x00001 /* Share this mapping */ +#define MAP_PRIVATE 0x00002 /* Create a private copy-on-write mapping */ +#define MAP_TYPE 0x0000f /* Mask for type of mapping */ +#define MAP_FIXED 0x00010 /* Map to specified address exactly */ +#define MAP_FILE 0x00000 /* The mapping is backed by a file */ +#define MAP_ANONYMOUS 0x00020 /* The mapping is not backed by any file */ +#define MAP_ANON MAP_ANONYMOUS + +/* These are Linux-specific. */ + +#define MAP_GROWSDOWN 0x00100 /* Used to stack allocations */ +#define MAP_DENYWRITE 0x00800 /* Do not permit writes to file */ +#define MAP_EXECUTABLE 0x01000 /* Mark it as an executable */ +#define MAP_LOCKED 0x02000 /* Lock pages mapped into memory */ +#define MAP_NORESERVE 0x04000 /* Do not reserve swap space for this mapping */ +#define MAP_POPULATE 0x08000 /* Populate (prefault) pagetables */ +#define MAP_NONBLOCK 0x10000 /* Do not block on IO */ + +/* Failure return */ + +#define MAP_FAILED ((void*)-1) + +/**************************************************************************** + * Public Type Definitions + ****************************************************************************/ + +/**************************************************************************** + * Public Function Prototypes + ****************************************************************************/ + +#undef EXTERN +#if defined(__cplusplus) +#define EXTERN extern "C" +extern "C" { +#else +#define EXTERN extern +#endif + +EXTERN FAR void *mmap(FAR void *start, size_t length, int prot, int flags, + int fd, off_t offset); +#define munmap(start, length) + +#undef EXTERN +#if defined(__cplusplus) +} +#endif + +#endif /* __SYS_MMAN_H */ |