From e109c6124fe121618e42ba882e2a0af6e97b8efc Mon Sep 17 00:00:00 2001 From: Ulrich Drepper Date: Fri, 3 Apr 2009 19:57:16 +0000 Subject: * misc/Makefile (routines): Add preadv, preadv64, pwritev, pwritev64. * misc/Versions: Export preadv, preadv64, pwritev, pwritev64 for GLIBC_2.10. * misc/sys/uio.h: Declare preadv, preadv64, pwritev, pwritev64. * sysdeps/unix/sysv/linux/kernel-features.h: Add entries for preadv and pwritev. * misc/preadv.c: New file. * misc/preadv64.c: New file. * misc/pwritev.c: New file. * misc/pwritev64.c: New file. * sysdeps/posx/preadv.c: New file. * sysdeps/posx/preadv64.c: New file. * sysdeps/posx/pwritev.c: New file. * sysdeps/posx/pwritev64.c: New file. * sysdeps/unix/sysv/linux/preadv.c: New file. * sysdeps/unix/sysv/linux/preadv64.c: New file. * sysdeps/unix/sysv/linux/pwritev.c: New file. * sysdeps/unix/sysv/linux/pwritev64.c: New file. * sysdeps/unix/sysv/linux/wordsize-64/preadv64.c: New file. * sysdeps/unix/sysv/linux/wordsize-64/pwritev64.c: New file. --- sysdeps/unix/sysv/linux/kernel-features.h | 7 ++ sysdeps/unix/sysv/linux/preadv.c | 88 +++++++++++++++++++++++++ sysdeps/unix/sysv/linux/preadv64.c | 6 ++ sysdeps/unix/sysv/linux/pwritev.c | 88 +++++++++++++++++++++++++ sysdeps/unix/sysv/linux/pwritev64.c | 6 ++ sysdeps/unix/sysv/linux/wordsize-64/preadv64.c | 1 + sysdeps/unix/sysv/linux/wordsize-64/pwritev64.c | 1 + 7 files changed, 197 insertions(+) create mode 100644 sysdeps/unix/sysv/linux/preadv.c create mode 100644 sysdeps/unix/sysv/linux/preadv64.c create mode 100644 sysdeps/unix/sysv/linux/pwritev.c create mode 100644 sysdeps/unix/sysv/linux/pwritev64.c create mode 100644 sysdeps/unix/sysv/linux/wordsize-64/preadv64.c create mode 100644 sysdeps/unix/sysv/linux/wordsize-64/pwritev64.c (limited to 'sysdeps/unix/sysv') diff --git a/sysdeps/unix/sysv/linux/kernel-features.h b/sysdeps/unix/sysv/linux/kernel-features.h index 9053df1..a640765 100644 --- a/sysdeps/unix/sysv/linux/kernel-features.h +++ b/sysdeps/unix/sysv/linux/kernel-features.h @@ -529,3 +529,10 @@ #if __LINUX_KERNEL_VERSION >= 0x02061d # define __ASSUME_FUTEX_CLOCK_REALTIME 1 #endif + +/* Support for preadv and pwritev was added in 2.6.30. */ +#if __LINUX_KERNEL_VERSION >= 0x02061e \ + && (defined __i386__ || defined __x86_64__) +# define __ASSUME_PREADV 1 +# define __ASSUME_PWRITEV 1 +#endif diff --git a/sysdeps/unix/sysv/linux/preadv.c b/sysdeps/unix/sysv/linux/preadv.c new file mode 100644 index 0000000..e2f8238 --- /dev/null +++ b/sysdeps/unix/sysv/linux/preadv.c @@ -0,0 +1,88 @@ +/* Copyright (C) 2009 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, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#include +#include +#include +#if __WORDSIZE == 64 +/* Hide the preadv64 declaration. */ +# define preadv64 __redirect_preadv64 +#endif +#include + +#include +#include +#include + +#ifndef PREADV +# define PREADV preadv +# define PREADV_REPLACEMENT __atomic_preadv_replacement +# define PREAD __pread +# define OFF_T off_t +#endif + +static ssize_t PREADV_REPLACEMENT (int, __const struct iovec *, + int, OFF_T) internal_function; + + +ssize_t +PREADV (fd, vector, count, offset) + int fd; + const struct iovec *vector; + int count; + OFF_T offset; +{ +#ifdef __NR_preadv + ssize_t result; + + if (SINGLE_THREAD_P) + result = INLINE_SYSCALL (preadv, 5, fd, vector, count, offset >> 32, + offset & 0xffffffff); + else + { + int oldtype = LIBC_CANCEL_ASYNC (); + + result = INLINE_SYSCALL (preadv, 5, fd, vector, count, offset >> 32, + offset & 0xffffffff); + + LIBC_CANCEL_RESET (oldtype); + } +# ifdef __ASSUME_PREADV + return result; +# endif +#endif + +#ifndef __ASSUME_PREADV +# ifdef __NR_preadv + if (result >= 0 || errno != ENOSYS) + return result; +# endif + + return PREADV_REPLACEMENT (fd, vector, count, offset); +#endif +} +#if __WORDSIZE == 64 +# undef preadv64 +strong_alias (preadv, preadv64) +#endif + +#ifndef __ASSUME_PREADV +# undef PREADV +# define PREADV static internal_function PREADV_REPLACEMENT +# include +#endif diff --git a/sysdeps/unix/sysv/linux/preadv64.c b/sysdeps/unix/sysv/linux/preadv64.c new file mode 100644 index 0000000..739df00 --- /dev/null +++ b/sysdeps/unix/sysv/linux/preadv64.c @@ -0,0 +1,6 @@ +#define PREADV preadv64 +#define PREADV_REPLACEMENT __atomic_preadv64_replacement +#define PREAD __pread64 +#define OFF_T off64_t + +#include "preadv.c" diff --git a/sysdeps/unix/sysv/linux/pwritev.c b/sysdeps/unix/sysv/linux/pwritev.c new file mode 100644 index 0000000..df430ff --- /dev/null +++ b/sysdeps/unix/sysv/linux/pwritev.c @@ -0,0 +1,88 @@ +/* Copyright (C) 2009 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, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#include +#include +#include +#if __WORDSIZE == 64 && !defined PWRITEV +/* Hide the pwritev64 declaration. */ +# define pwritev64 __redirect_pwritev64 +#endif +#include + +#include +#include +#include + +#ifndef PWRITEV +# define PWRITEV pwritev +# define PWRITEV_REPLACEMENT __atomic_pwritev_replacement +# define PWRITE __pwrite +# define OFF_T off_t +#endif + +static ssize_t PWRITEV_REPLACEMENT (int, __const struct iovec *, + int, OFF_T) internal_function; + + +ssize_t +PWRITEV (fd, vector, count, offset) + int fd; + const struct iovec *vector; + int count; + OFF_T offset; +{ +#ifdef __NR_pwritev + ssize_t result; + + if (SINGLE_THREAD_P) + result = INLINE_SYSCALL (pwritev, 5, fd, vector, count, offset >> 32, + offset & 0xffffffff); + else + { + int oldtype = LIBC_CANCEL_ASYNC (); + + result = INLINE_SYSCALL (pwritev, 5, fd, vector, count, offset >> 32, + offset & 0xffffffff); + + LIBC_CANCEL_RESET (oldtype); + } +# ifdef __ASSUME_PWRITEV + return result; +# endif +#endif + +#ifndef __ASSUME_PWRITEV +# ifdef __NR_pwritev + if (result >= 0 || errno != ENOSYS) + return result; +# endif + + return PWRITEV_REPLACEMENT (fd, vector, count, offset); +#endif +} +#if __WORDSIZE == 64 && defined pwritev64 +# undef pwritev64 +strong_alias (pwritev, pwritev64) +#endif + +#ifndef __ASSUME_PWRITEV +# undef PWRITEV +# define PWRITEV static internal_function PWRITEV_REPLACEMENT +# include +#endif diff --git a/sysdeps/unix/sysv/linux/pwritev64.c b/sysdeps/unix/sysv/linux/pwritev64.c new file mode 100644 index 0000000..1e8168f --- /dev/null +++ b/sysdeps/unix/sysv/linux/pwritev64.c @@ -0,0 +1,6 @@ +#define PWRITEV pwritev64 +#define PWRITEV_REPLACEMENT __atomic_pwritev64_replacement +#define PWRITE __pwrite64 +#define OFF_T off64_t + +#include "pwritev.c" diff --git a/sysdeps/unix/sysv/linux/wordsize-64/preadv64.c b/sysdeps/unix/sysv/linux/wordsize-64/preadv64.c new file mode 100644 index 0000000..fd9320c --- /dev/null +++ b/sysdeps/unix/sysv/linux/wordsize-64/preadv64.c @@ -0,0 +1 @@ +/* Empty since the preadv syscall is equivalent. */ diff --git a/sysdeps/unix/sysv/linux/wordsize-64/pwritev64.c b/sysdeps/unix/sysv/linux/wordsize-64/pwritev64.c new file mode 100644 index 0000000..8b72a29 --- /dev/null +++ b/sysdeps/unix/sysv/linux/wordsize-64/pwritev64.c @@ -0,0 +1 @@ +/* Empty since the pwritev syscall is equivalent. */ -- cgit v1.1