libam7xxx  0.1
Communication library for Actions Micro AM7XXX based USB projectors and DPFs
tools.c
1 /* am7xxx - communication with AM7xxx based USB Pico Projectors and DPFs
2  *
3  * Copyright (C) 2014 Antonio Ospite <ao2@ao2.it>
4  *
5  * This program is free software: you can redistribute it and/or modify
6  * it under the terms of the GNU General Public License as published by
7  * the Free Software Foundation, either version 2 of the License, or
8  * (at your option) any later version.
9  *
10  * This program is distributed in the hope that it will be useful,
11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13  * GNU General Public License for more details.
14  *
15  * You should have received a copy of the GNU General Public License
16  * along with this program. If not, see <http://www.gnu.org/licenses/>.
17  */
18 
19 #include <errno.h>
20 #include <time.h>
21 
22 #include "tools.h"
23 
31 int msleep(unsigned long msecs)
32 {
33  struct timespec delay;
34  int ret;
35 
36  delay.tv_sec = msecs / 1000;
37  delay.tv_nsec = (msecs % 1000) * 1000000;
38  while (1) {
39  ret = nanosleep(&delay, &delay);
40  if (ret == -1 && errno == EINTR)
41  continue;
42  break;
43  }
44  if (ret == -1)
45  return ret;
46 
47  return 0;
48 }