*
* 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.
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
#include "ao.h"
+#ifndef HAS_MUTEX_TRY
+#define HAS_MUTEX_TRY 1
+#endif
+
+#if HAS_MUTEX_TRY
+
+uint8_t
+ao_mutex_try(__xdata uint8_t *mutex, uint8_t task_id) __reentrant
+{
+ uint8_t ret;
+ if (*mutex == task_id)
+ ao_panic(AO_PANIC_MUTEX);
+ ao_arch_critical(
+ if (*mutex)
+ ret = 0;
+ else {
+ *mutex = task_id;
+ ret = 1;
+ });
+ return ret;
+}
+#endif
+
void
ao_mutex_get(__xdata uint8_t *mutex) __reentrant
{