altos: Rename 'core' to 'kernel'

[fw/altos] / src / kernel / ao_notask.c

diff --git a/src/kernel/ao_notask.c b/src/kernel/ao_notask.c
new file mode 100644 (file)
index 0000000..6f967e6
--- /dev/null
+++ b/src/kernel/ao_notask.c
@@ -0,0 +1,46 @@
+/*
+ * Copyright © 2012 Keith Packard <keithp@keithp.com>
+ *
+ * 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>
+
+static volatile void *ao_wchan;
+
+uint8_t
+ao_sleep(__xdata void *wchan)
+{
+#if 1
+       ao_wchan = wchan;
+       ao_arch_wait_interrupt();
+#else
+       uint8_t sreg;
+
+       ao_wchan = wchan;
+       asm("in %0,__SREG__" : "=&r" (sreg));
+       sei();
+       while (ao_wchan)
+               ao_arch_cpu_idle();
+       asm("out __SREG__,%0" : : "r" (sreg));
+#endif
+       return 0;
+}
+
+void
+ao_wakeup(__xdata void *wchan)
+{
+       (void) wchan;
+       ao_wchan = 0;
+}