1 /* 2 * Panel client to access panel servers. 3 * 4 * (c) 2018 Paul Boddie <paul@boddie.org.uk> 5 * 6 * This program is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU General Public License as 8 * published by the Free Software Foundation; either version 2 of 9 * the License, or (at your option) any later version. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program; if not, write to the Free Software 18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, 19 * Boston, MA 02110-1301, USA 20 */ 21 22 #include <l4/cxx/ipc_stream> 23 #include <l4/re/env> 24 #include <l4/sys/err.h> 25 26 #include "panel-client.h" 27 #include "panel-ops.h" 28 29 #include <stdint.h> 30 31 int 32 Panel_device_interface::get_panel(uint8_t *data, unsigned long datalen) throw() 33 { 34 L4::Ipc::Iostream s(l4_utcb()); 35 36 int err = l4_error(s.call(cap(), Panel_op_get_panel)); 37 if (err) return err; 38 39 // Obtain the message from the stream. 40 41 unsigned long size = datalen; 42 s >> L4::Ipc::buf_cp_in<uint8_t>(data, datalen); 43 44 if (size != datalen) return -L4_EIO; 45 return L4_EOK; 46 }