88 lines
2.5 KiB
C
88 lines
2.5 KiB
C
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/**************************************************************************
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*
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* Copyright 2011 LunarG, Inc.
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* All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sub license, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial portions
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* of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
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* IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
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* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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**************************************************************************/
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/**
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* @file
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* OS independent memory mapping (with large file support).
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*
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* @author Chia-I Wu <olvaffe@gmail.com>
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*/
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#ifndef _OS_MMAN_H_
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#define _OS_MMAN_H_
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#include "pipe/p_config.h"
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#include "pipe/p_compiler.h"
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#if defined(PIPE_OS_UNIX)
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# ifndef _FILE_OFFSET_BITS
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# error _FILE_OFFSET_BITS must be defined to 64
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# endif
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# include <sys/mman.h>
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#else
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# error Unsupported OS
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#endif
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#if defined(PIPE_OS_ANDROID)
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# include <errno.h> /* for EINVAL */
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#endif
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#ifdef __cplusplus
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extern "C" {
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#endif
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#if defined(PIPE_OS_ANDROID)
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extern void *__mmap2(void *, size_t, int, int, int, size_t);
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static INLINE void *os_mmap(void *addr, size_t length, int prot, int flags, int fd, loff_t offset)
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{
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/* offset must be aligned to 4096 (not necessarily the page size) */
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if (unlikely(offset & 4095)) {
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errno = EINVAL;
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return MAP_FAILED;
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}
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return __mmap2(addr, length, prot, flags, fd, (size_t) (offset >> 12));
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}
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#else
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/* assume large file support exists */
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# define os_mmap(addr, length, prot, flags, fd, offset) mmap(addr, length, prot, flags, fd, offset)
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#endif
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#define os_munmap(addr, length) munmap(addr, length)
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#ifdef __cplusplus
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}
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#endif
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#endif /* _OS_MMAN_H_ */
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