From: klueska <klueska>
Date: Sat, 17 May 2008 02:18:09 +0000 (+0000)
Subject: Added alternalte PowerManagerP implementation that infinitely retrys on the fail... 
X-Git-Tag: release_tinyos_2_1_0_0~397
X-Git-Url: https://oss.titaniummirror.com/gitweb/?p=tinyos-2.x.git;a=commitdiff_plain;h=f2dd72f830b2977ea9709c35dddb960eb59e31f3

Added alternalte PowerManagerP implementation that infinitely retrys on the fail of start or stop
---

diff --git a/tos/lib/power/InfiniteRetryPowerManagerP.nc b/tos/lib/power/InfiniteRetryPowerManagerP.nc
new file mode 100644
index 00000000..48eb1cb2
--- /dev/null
+++ b/tos/lib/power/InfiniteRetryPowerManagerP.nc
@@ -0,0 +1,135 @@
+/*
+ * "Copyright (c) 2005 Washington University in St. Louis.
+ * All rights reserved.
+ *
+ * Permission to use, copy, modify, and distribute this software and its
+ * documentation for any purpose, without fee, and without written agreement is
+ * hereby granted, provided that the above copyright notice, the following
+ * two paragraphs and the author appear in all copies of this software.
+ *
+ * IN NO EVENT SHALL WASHINGTON UNIVERSITY IN ST. LOUIS BE LIABLE TO ANY PARTY 
+ * FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING 
+ * OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF WASHINGTON 
+ * UNIVERSITY IN ST. LOUIS HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * WASHINGTON UNIVERSITY IN ST. LOUIS SPECIFICALLY DISCLAIMS ANY WARRANTIES,
+ * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS
+ * ON AN "AS IS" BASIS, AND WASHINGTON UNIVERSITY IN ST. LOUIS HAS NO 
+ * OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR
+ * MODIFICATIONS."
+ *
+ */
+ 
+/*
+ * - Revision -------------------------------------------------------------
+ * $Revision$
+ * $Date$ 
+ * ======================================================================== 
+ */
+ 
+/**
+ * Please refer to TEP 115 for more information about this component and its
+ * intended use.<br><br>
+ *
+ * This is the internal implementation of the standard power management
+ * policy for managing the power states of non-virtualized devices.
+ * Non-virtualized devices are shared using a parameterized Resource
+ * interface, and are powered down according to some policy whenever there
+ * are no more pending requests to that Resource.  The policy implemented
+ * by this component is to power down a device as soon as it becomes free.
+ * Such a policy is useful whenever a device has a negligible wake-up
+ * latency.  There is no cost associated with waiting for the device to
+ * power up, so it can be powered on and off as often as possible.
+ * 
+ * @author Kevin Klues (klueska@cs.wustl.edu)
+ */
+ 
+generic module PowerManagerP() {
+  uses {
+    interface StdControl;
+    interface SplitControl;
+
+    interface PowerDownCleanup;
+    interface ResourceDefaultOwner;
+    interface ArbiterInfo;
+  }
+}
+implementation {
+
+  norace bool stopping = FALSE;
+  norace bool requested  = FALSE;
+
+  task void startTask() {
+    if(call StdControl.start() == SUCCESS)
+      if(call SplitControl.start() == SUCCESS)
+        return;
+    post startTask();
+  }
+
+  task void stopTask() {
+    if(call StdControl.stop() == SUCCESS)
+      if(call SplitControl.stop() == SUCCESS)
+        return;
+    post startTask();
+  }
+
+  async event void ResourceDefaultOwner.requested() {
+    if(stopping == FALSE) {
+      post startTask();
+    }
+    else requested = TRUE;
+  }
+
+  async event void ResourceDefaultOwner.immediateRequested() {
+  }
+  
+  default command error_t StdControl.start() {
+    return SUCCESS;
+  }
+  default command error_t SplitControl.start() {
+    signal SplitControl.startDone(SUCCESS);
+    return SUCCESS;
+  }
+
+  event void SplitControl.startDone(error_t error) {
+    if(error != SUCCESS) {
+      post startTask();
+      return;
+    }
+    if(call ResourceDefaultOwner.isOwner())
+      call ResourceDefaultOwner.release();
+  }
+  
+  async event void ResourceDefaultOwner.granted() {
+    atomic stopping = TRUE;
+    call PowerDownCleanup.cleanup();
+    post stopTask();
+  }
+
+  event void SplitControl.stopDone(error_t error) {
+    if(error != SUCCESS) {
+      post stopTask();
+      return;
+    }
+    if(requested == TRUE) {
+      call StdControl.start();
+      call SplitControl.start();
+    }
+    atomic {
+      requested = FALSE;
+      stopping = FALSE;
+    }
+  }
+
+  default command error_t StdControl.stop() {
+    return SUCCESS;
+  }
+  default command error_t SplitControl.stop() {
+    signal SplitControl.stopDone(SUCCESS);
+    return SUCCESS;
+  }
+
+  default async command void PowerDownCleanup.cleanup() {
+  }
+}