| /* millisleep.c - generic millisleep function. |
| * The generic implementation of these functions can be used for architectures |
| * or platforms that do not have a more specialized implementation. */ |
| /* |
| * GRUB -- GRand Unified Bootloader |
| * Copyright (C) 1999,2000,2001,2002,2003,2004,2005,2006,2007,2008 Free Software Foundation, Inc. |
| * |
| * GRUB is free software: you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation, either version 3 of the License, or |
| * (at your option) any later version. |
| * |
| * GRUB is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with GRUB. If not, see <http://www.gnu.org/licenses/>. |
| */ |
| |
| #include <grub/misc.h> |
| #include <grub/time.h> |
| |
| void |
| grub_millisleep (grub_uint32_t ms) |
| { |
| grub_uint64_t start; |
| |
| start = grub_get_time_ms (); |
| |
| /* Instead of setting an end time and looping while the current time is |
| less than that, comparing the elapsed sleep time with the desired sleep |
| time handles the (unlikely!) case that the timer would wrap around |
| during the sleep. */ |
| |
| while (grub_get_time_ms () - start < ms) |
| grub_cpu_idle (); |
| } |