diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/bits/uio_lim.h')
-rw-r--r-- | sysdeps/unix/sysv/linux/bits/uio_lim.h | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/bits/uio_lim.h b/sysdeps/unix/sysv/linux/bits/uio_lim.h new file mode 100644 index 0000000000..a443fd8e5f --- /dev/null +++ b/sysdeps/unix/sysv/linux/bits/uio_lim.h @@ -0,0 +1,32 @@ +/* Implementation limits related to sys/uio.h - Linux version. + Copyright (C) 2017-2018 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <http://www.gnu.org/licenses/>. */ + +#ifndef _BITS_UIO_LIM_H +#define _BITS_UIO_LIM_H 1 + +/* Maximum length of the 'struct iovec' array in a single call to + readv or writev. + + This macro has different values in different kernel versions. The + latest versions of the kernel use 1024 and this is good choice. Since + the C library implementation of readv/writev is able to emulate the + functionality even if the currently running kernel does not support + this large value the readv/writev call will not fail because of this. */ +#define __IOV_MAX 1024 + +#endif |