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/* vi: set sw=4 ts=4: */
/*
* writev() for uClibc
*
* Copyright (C) 2000-2006 Erik Andersen <andersen@uclibc.org>
*
* Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
*/
#include <sys/syscall.h>
#include <sys/uio.h>
#ifdef __UCLIBC_HAS_THREADS_NATIVE__
#include <errno.h>
#include <sysdep-cancel.h>
/* We should deal with kernel which have a smaller UIO_FASTIOV as well
as a very big count. */
static ssize_t __writev (int fd, const struct iovec *vector, int count)
{
ssize_t bytes_written;
bytes_written = INLINE_SYSCALL (writev, 3, fd, vector, count);
if (bytes_written >= 0 || errno != EINVAL || count <= UIO_FASTIOV)
return bytes_written;
/* glibc tries again, but we do not. */
/* return __atomic_writev_replacement (fd, vector, count); */
return -1;
}
ssize_t writev (int fd, const struct iovec *vector, int count)
{
if (SINGLE_THREAD_P)
return __writev (fd, vector, count);
int oldtype = LIBC_CANCEL_ASYNC ();
ssize_t result = __writev (fd, vector, count);
LIBC_CANCEL_RESET (oldtype);
return result;
}
#else
_syscall3(ssize_t, writev, int, filedes, const struct iovec *, vector,
int, count)
#endif
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