mirror of https://gitlab.freedesktop.org/mesa/mesa
86 lines
2.5 KiB
C
86 lines
2.5 KiB
C
/**************************************************************************
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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 <assert.h>
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#include <stddef.h>
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#include "util/detect_os.h"
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#if DETECT_OS_UNIX
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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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#ifdef __cplusplus
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extern "C" {
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#endif
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#if DETECT_OS_ANDROID && !defined(__LP64__)
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/* 32-bit needs mmap64 for 64-bit offsets */
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# define os_mmap(addr, length, prot, flags, fd, offset) \
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mmap64(addr, length, prot, flags, fd, offset)
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# define os_munmap(addr, length) \
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munmap(addr, length)
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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) \
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mmap(addr, length, prot, flags, fd, offset)
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static inline int os_munmap(void *addr, size_t length)
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{
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/* Copied from configure code generated by AC_SYS_LARGEFILE */
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#define LARGE_OFF_T ((((off_t) 1 << 31) << 31) - 1 + \
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(((off_t) 1 << 31) << 31))
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static_assert(LARGE_OFF_T % 2147483629 == 721 &&
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LARGE_OFF_T % 2147483647 == 1, "");
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#undef LARGE_OFF_T
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return munmap(addr, length);
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}
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#endif
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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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