From 210dbaa23cdacf3a6f2d6e23493e96ee2ac9bca7 Mon Sep 17 00:00:00 2001 From: Keith Packard Date: Thu, 4 Jun 2009 10:41:34 -0700 Subject: Use autotools, move altos to src subdir Signed-off-by: Keith Packard --- src/ao_mutex.c | 41 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 41 insertions(+) create mode 100644 src/ao_mutex.c (limited to 'src/ao_mutex.c') diff --git a/src/ao_mutex.c b/src/ao_mutex.c new file mode 100644 index 00000000..c82a7d57 --- /dev/null +++ b/src/ao_mutex.c @@ -0,0 +1,41 @@ +/* + * Copyright © 2009 Keith Packard + * + * This program 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; version 2 of the License. + * + * This program 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 this program; if not, write to the Free Software Foundation, Inc., + * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. + */ + +#include "ao.h" + +void +ao_mutex_get(__xdata uint8_t *mutex) __reentrant +{ + if (*mutex == ao_cur_task->task_id) + ao_panic(AO_PANIC_MUTEX); + __critical { + while (*mutex) + ao_sleep(mutex); + *mutex = ao_cur_task->task_id; + } +} + +void +ao_mutex_put(__xdata uint8_t *mutex) __reentrant +{ + if (*mutex != ao_cur_task->task_id) + ao_panic(AO_PANIC_MUTEX); + __critical { + *mutex = 0; + ao_wakeup(mutex); + } +} -- cgit v1.2.3