Merge devel code into the trunk.

[tinyos-2.x.git] / tos / platforms / mica2 / NestedResourceC.nc

diff --git a/tos/platforms/mica2/NestedResourceC.nc b/tos/platforms/mica2/NestedResourceC.nc
new file mode 100644 (file)
index 0000000..a1ef26c
--- /dev/null
+++ b/tos/platforms/mica2/NestedResourceC.nc
@@ -0,0 +1,62 @@
+/* $Id$
+ * Copyright (c) 2006 Intel Corporation
+ * All rights reserved.
+ *
+ * This file is distributed under the terms in the attached INTEL-LICENSE     
+ * file. If you do not find these files, copies can be found by writing to
+ * Intel Research Berkeley, 2150 Shattuck Avenue, Suite 1300, Berkeley, CA, 
+ * 94704.  Attention:  Intel License Inquiry.
+ */
+/**
+ * Package up two resources as one. Requests and releases are passed on to
+ * both resources. granted is only signaled when both Resources are granted.
+ *
+ * @author David Gay
+ */
+
+generic module NestedResourceC() {
+  provides interface Resource;
+  uses {
+    /**
+     * First Resource to merge. This Resource MUST NOT be wired elsewhere.
+     */
+    interface Resource as Resource1;
+
+    /**
+     * Second Resource to merge. This Resource MUST NOT be wired elsewhere.
+     */
+    interface Resource as Resource2;
+  }
+}
+implementation
+{
+  async command error_t Resource.request() {
+    return call Resource1.request();
+  }
+
+  event void Resource1.granted() {
+    call Resource2.request();
+  }
+
+  event void Resource2.granted() {
+    signal Resource.granted();
+  }
+  async command error_t Resource.immediateRequest() {
+    if (call Resource1.immediateRequest() == SUCCESS)
+      {
+       if (call Resource2.immediateRequest() == SUCCESS)
+         return SUCCESS;
+       call Resource1.release();
+      }
+    return EBUSY;
+  }
+
+  async command void Resource.release() {
+    call Resource1.release();
+    call Resource2.release();
+  }
+
+  async command uint8_t Resource.isOwner() {
+    return call Resource1.isOwner();
+  }
+}