1 //===-- Linux implementation of tcflush -----------------------------------===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 #include "src/termios/tcflush.h" 10 11 #include "src/__support/OSUtil/syscall.h" 12 #include "src/__support/common.h" 13 #include "src/errno/libc_errno.h" 14 15 #include <asm/ioctls.h> // Safe to include without the risk of name pollution. 16 #include <sys/syscall.h> // For syscall numbers 17 #include <termios.h> 18 19 namespace LIBC_NAMESPACE { 20 21 LLVM_LIBC_FUNCTION(int, tcflush, (int fd, int queue_selector)) { 22 int ret = 23 LIBC_NAMESPACE::syscall_impl<int>(SYS_ioctl, fd, TCFLSH, queue_selector); 24 if (ret < 0) { 25 libc_errno = -ret; 26 return -1; 27 } 28 return 0; 29 } 30 31 } // namespace LIBC_NAMESPACE 32