| /* 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 |