The first commit

src/done/piacs.c

@@ -0,0 +1,24 @@
+#include <os_internal.h>
+
+#define PI_Q_BUF_LEN 1
+u32 __osPiAccessQueueEnabled = 0;
+static OSMesg piAccessBuf[PI_Q_BUF_LEN];
+OSMesgQueue __osPiAccessQueue;
+void __osPiCreateAccessQueue(void)
+{
+
+	__osPiAccessQueueEnabled = 1;
+	osCreateMesgQueue(&__osPiAccessQueue, piAccessBuf, PI_Q_BUF_LEN);
+	osSendMesg(&__osPiAccessQueue, NULL, OS_MESG_NOBLOCK);
+}
+void __osPiGetAccess(void)
+{
+	OSMesg dummyMesg;
+	if (!__osPiAccessQueueEnabled)
+		__osPiCreateAccessQueue();
+	osRecvMesg(&__osPiAccessQueue, &dummyMesg, OS_MESG_BLOCK);
+}
+void __osPiRelAccess(void)
+{
+	osSendMesg(&__osPiAccessQueue, NULL, OS_MESG_NOBLOCK);
+}