uio_lim.h 1.9 KB

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  1. //
  2. // Copyright 2026 Aarav Ravindra Kharade
  3. //
  4. // Licensed under the Apache License, Version 2.0 (the "License");
  5. // you may not use this file except in compliance with the License.
  6. // You may obtain a copy of the License at
  7. //
  8. // http://www.apache.org/licenses/LICENSE-2.0
  9. //
  10. // Unless required by applicable law or agreed to in writing, software
  11. // distributed under the License is distributed on an "AS IS" BASIS,
  12. // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13. // See the License for the specific language governing permissions and
  14. // limitations under the License.
  15. //
  16. /* Implementation limits related to sys/uio.h - Linux version.
  17. Copyright (C) 2017-2026 Free Software Foundation, Inc.
  18. This file is part of the GNU C Library.
  19. The GNU C Library is free software; you can redistribute it and/or
  20. modify it under the terms of the GNU Lesser General Public
  21. License as published by the Free Software Foundation; either
  22. version 2.1 of the License, or (at your option) any later version.
  23. The GNU C Library is distributed in the hope that it will be useful,
  24. but WITHOUT ANY WARRANTY; without even the implied warranty of
  25. MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  26. Lesser General Public License for more details.
  27. You should have received a copy of the GNU Lesser General Public
  28. License along with the GNU C Library; if not, see
  29. <https://www.gnu.org/licenses/>. */
  30. #ifndef _BITS_UIO_LIM_H
  31. #define _BITS_UIO_LIM_H 1
  32. /* Maximum length of the 'struct iovec' array in a single call to
  33. readv or writev.
  34. This macro has different values in different kernel versions. The
  35. latest versions of the kernel use 1024 and this is good choice. Since
  36. the C library implementation of readv/writev is able to emulate the
  37. functionality even if the currently running kernel does not support
  38. this large value the readv/writev call will not fail because of this. */
  39. #define __IOV_MAX 1024
  40. #endif