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Member "mesa-20.1.8/src/gallium/auxiliary/os/os_mman.h" (16 Sep 2020, 2567 Bytes) of package /linux/misc/mesa-20.1.8.tar.xz:


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    1 /**************************************************************************
    2  *
    3  * Copyright 2011 LunarG, Inc.
    4  * All Rights Reserved.
    5  *
    6  * Permission is hereby granted, free of charge, to any person obtaining a
    7  * copy of this software and associated documentation files (the
    8  * "Software"), to deal in the Software without restriction, including
    9  * without limitation the rights to use, copy, modify, merge, publish,
   10  * distribute, sub license, and/or sell copies of the Software, and to
   11  * permit persons to whom the Software is furnished to do so, subject to
   12  * the following conditions:
   13  *
   14  * The above copyright notice and this permission notice (including the
   15  * next paragraph) shall be included in all copies or substantial portions
   16  * of the Software.
   17  *
   18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
   19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
   20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
   21  * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
   22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
   23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
   24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
   25  *
   26  **************************************************************************/
   27 
   28 /**
   29  * @file
   30  * OS independent memory mapping (with large file support).
   31  *
   32  * @author Chia-I Wu <olvaffe@gmail.com>
   33  */
   34 
   35 #ifndef _OS_MMAN_H_
   36 #define _OS_MMAN_H_
   37 
   38 
   39 #include "pipe/p_config.h"
   40 #include "pipe/p_compiler.h"
   41 
   42 #if defined(PIPE_OS_UNIX)
   43 #  include <sys/mman.h>
   44 #else
   45 #  error Unsupported OS
   46 #endif
   47 
   48 #ifdef  __cplusplus
   49 extern "C" {
   50 #endif
   51 
   52 
   53 #if defined(PIPE_OS_ANDROID) && !defined(__LP64__)
   54 /* 32-bit needs mmap64 for 64-bit offsets */
   55 #  define os_mmap(addr, length, prot, flags, fd, offset) \
   56              mmap64(addr, length, prot, flags, fd, offset)
   57 
   58 #  define os_munmap(addr, length) \
   59              munmap(addr, length)
   60 
   61 #else
   62 /* assume large file support exists */
   63 #  define os_mmap(addr, length, prot, flags, fd, offset) \
   64              mmap(addr, length, prot, flags, fd, offset)
   65 
   66 static inline int os_munmap(void *addr, size_t length)
   67 {
   68    /* Copied from configure code generated by AC_SYS_LARGEFILE */
   69 #define LARGE_OFF_T ((((off_t) 1 << 31) << 31) - 1 + \
   70                      (((off_t) 1 << 31) << 31))
   71    STATIC_ASSERT(LARGE_OFF_T % 2147483629 == 721 &&
   72                  LARGE_OFF_T % 2147483647 == 1);
   73 #undef LARGE_OFF_T
   74 
   75    return munmap(addr, length);
   76 }
   77 #endif
   78 
   79 
   80 #ifdef  __cplusplus
   81 }
   82 #endif
   83 
   84 #endif /* _OS_MMAN_H_ */