libc/include/llvm-libc-macros/sys-mman-macros.h

   1 //===-- Macros defined in sys/mman.h header file --------------------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #ifndef LLVM_LIBC_MACROS_SYS_MMAN_MACROS_H
  10 #define LLVM_LIBC_MACROS_SYS_MMAN_MACROS_H
  11
  12 // Use definitions from <linux/mman.h> to dispatch arch-specific flag values.
  13 // For example, MCL_CURRENT/MCL_FUTURE/MCL_ONFAULT are different on different
  14 // architectures.
  15 #if __has_include(<linux/mman.h>)
  16 #include <linux/mman.h>
  17 #else
  18 #error "cannot use <sys/mman.h> without proper system headers."
  19 #endif
  20
  21 // Some posix standard flags may not be defined in system headers.
  22 // Posix mmap flags.
  23 #ifndef MAP_FAILED
  24 #define MAP_FAILED ((void *)-1)
  25 #endif
  26
  27 // Posix memory advise flags. (posix_madvise)
  28 #ifndef POSIX_MADV_NORMAL
  29 #define POSIX_MADV_NORMAL MADV_NORMAL
  30 #endif
  31
  32 #ifndef POSIX_MADV_SEQUENTIAL
  33 #define POSIX_MADV_SEQUENTIAL MADV_SEQUENTIAL
  34 #endif
  35
  36 #ifndef POSIX_MADV_RANDOM
  37 #define POSIX_MADV_RANDOM MADV_RANDOM
  38 #endif
  39
  40 #ifndef POSIX_MADV_WILLNEED
  41 #define POSIX_MADV_WILLNEED MADV_WILLNEED
  42 #endif
  43
  44 #ifndef POSIX_MADV_DONTNEED
  45 #define POSIX_MADV_DONTNEED MADV_DONTNEED
  46 #endif
  47
  48 #endif // LLVM_LIBC_MACROS_SYS_MMAN_MACROS_H