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c3e926bf3b
This was introduced 10 years ago to squeeze a few CPU cycles per syscall on 32-bit x86 machines and was already quite old by then, requiring to explicitly enable support for this in the kernel. We don't even know if it still builds, let alone if it works at all on recent kernels! Let's completely drop this now.
78 lines
2.1 KiB
C
78 lines
2.1 KiB
C
/*
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* include/common/splice.h
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* Splice definition for older Linux libc.
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*
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* Copyright 2000-2011 Willy Tarreau <w@1wt.eu>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation, version 2.1
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* exclusively.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*/
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#ifndef _COMMON_SPLICE_H
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#define _COMMON_SPLICE_H
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#if defined (__linux__) && defined(USE_LINUX_SPLICE)
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#include <errno.h>
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#include <unistd.h>
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#include <sys/syscall.h>
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#include <common/syscall.h>
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/* On recent Linux kernels, the splice() syscall may be used for faster data copy.
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* But it's not always defined on some OS versions, and it even happens that some
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* definitions are wrong with some glibc due to an offset bug in syscall().
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*/
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#ifndef SPLICE_F_MOVE
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#define SPLICE_F_MOVE 0x1
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#endif
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#ifndef SPLICE_F_NONBLOCK
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#define SPLICE_F_NONBLOCK 0x2
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#endif
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#ifndef SPLICE_F_MORE
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#define SPLICE_F_MORE 0x4
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#endif
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#if defined(USE_MY_SPLICE)
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/* We'll define a syscall, so for this we need __NR_splice. It should have
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* been provided by syscall.h.
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*/
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#ifndef __NR_splice
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#warning unsupported architecture, guessing __NR_splice=313 like x86...
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#define __NR_splice 313
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#endif /* __NR_splice */
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static inline _syscall6(int, splice, int, fdin, loff_t *, off_in, int, fdout, loff_t *, off_out, size_t, len, unsigned long, flags);
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#else
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/* use the system's definition */
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#include <fcntl.h>
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#endif /* USE_MY_SPLICE */
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#endif /* __linux__ && USE_LINUX_SPLICE */
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#endif /* _COMMON_SPLICE_H */
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/*
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* Local variables:
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* c-indent-level: 8
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* c-basic-offset: 8
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* End:
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*/
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