glibc/unistd/sleep.c

   1 /*
   2  *  ZeX/OS
   3  *  Copyright (C) 2007  Tomas 'ZeXx86' Jedrzejek (zexx86@gmail.com)
   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 3 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 unsigned int sleep (unsigned int s)
  20 {
  21         asm volatile (
  22                 "pushl %%eax;"
  23                 "pushl %%ebx;"
  24                 "pushl %%ecx;"
  25                 "pushl %%edx;"
  26                 "movl $3, %%eax;"
  27                 "movl %0, %%ebx;"
  28                 "int $0x80;"
  29                 "popl %%edx;"
  30                 "popl %%ecx;"
  31                 "popl %%ebx;"
  32                 "popl %%eax;"  :: "g" (s));
  33
  34         return 0;
  35 }
  36
  37 unsigned int usleep (unsigned int s)
  38 {
  39         asm volatile (
  40                 "pushl %%eax;"
  41                 "pushl %%ebx;"
  42                 "pushl %%ecx;"
  43                 "pushl %%edx;"
  44                 "movl $20, %%eax;"
  45                 "movl %0, %%ebx;"
  46                 "int $0x80;"
  47                 "popl %%edx;"
  48                 "popl %%ecx;"
  49                 "popl %%ebx;"
  50                 "popl %%eax;"  :: "g" (s));
  51
  52         return 0;
  53 }