diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/writev.c')
| -rw-r--r-- | sysdeps/unix/sysv/linux/writev.c | 45 |
1 files changed, 22 insertions, 23 deletions
diff --git a/sysdeps/unix/sysv/linux/writev.c b/sysdeps/unix/sysv/linux/writev.c index 05978665fa..55e915d34d 100644 --- a/sysdeps/unix/sysv/linux/writev.c +++ b/sysdeps/unix/sysv/linux/writev.c @@ -1,5 +1,5 @@ /* writev supports all Linux kernels >= 2.0. - Copyright (C) 1997, 1998, 2000, 2002, 2003 Free Software Foundation, Inc. + Copyright (C) 1997,1998,2000,2002,2003,2009 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 @@ -25,6 +25,7 @@ #include <sysdep-cancel.h> #include <sys/syscall.h> #include <bp-checks.h> +#include <kernel-features.h> static ssize_t __atomic_writev_replacement (int, const struct iovec *, int) internal_function; @@ -36,40 +37,38 @@ static ssize_t __atomic_writev_replacement (int, const struct iovec *, #endif -/* We should deal with kernel which have a smaller UIO_FASTIOV as well - as a very big count. */ -static ssize_t -do_writev (int fd, const struct iovec *vector, int count) -{ - ssize_t bytes_written; - - bytes_written = INLINE_SYSCALL (writev, 3, fd, CHECK_N (vector, count), count); - - if (bytes_written >= 0 || errno != EINVAL || count <= UIO_FASTIOV) - return bytes_written; - - return __atomic_writev_replacement (fd, vector, count); -} - ssize_t __libc_writev (fd, vector, count) int fd; const struct iovec *vector; int count; { - if (SINGLE_THREAD_P) - return do_writev (fd, vector, count); + ssize_t result; - int oldtype = LIBC_CANCEL_ASYNC (); + if (SINGLE_THREAD_P) + result = INLINE_SYSCALL (writev, 3, fd, CHECK_N (vector, count), count); + else + { + int oldtype = LIBC_CANCEL_ASYNC (); - ssize_t result = do_writev (fd, vector, count); + result = INLINE_SYSCALL (writev, 3, fd, CHECK_N (vector, count), count); - LIBC_CANCEL_RESET (oldtype); + LIBC_CANCEL_RESET (oldtype); + } +#ifdef __ASSUME_COMPLETE_READV_WRITEV return result; +#else + if (result >= 0 || errno != EINVAL || count <= UIO_FASTIOV) + return result; + + return __atomic_writev_replacement (fd, vector, count); +#endif } strong_alias (__libc_writev, __writev) weak_alias (__libc_writev, writev) -#define __libc_writev static internal_function __atomic_writev_replacement -#include <sysdeps/posix/writev.c> +#ifndef __ASSUME_COMPLETE_READV_WRITEV +# define __libc_writev static internal_function __atomic_writev_replacement +# include <sysdeps/posix/writev.c> +#endif |