presence: Add any of redundancy policy

Add a bitwise logical or redundancy policy implementation
(fan is present if any sensor indicates as such).

Change-Id: I1d161478a4a6fe9d5690a385703e41c6fff9c81c
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>

1 files changed, 75 insertions, 0 deletions

diff --git a/presence/anyof.hpp b/presence/anyof.hpp
new file mode 100644
index 0000000..70ddb43
--- /dev/null
+++ b/presence/anyof.hpp
@@ -0,0 +1,75 @@
+#pragma once
+
+#include <functional>
+#include <vector>
+#include "fan.hpp"
+#include "rpolicy.hpp"
+
+namespace phosphor
+{
+namespace fan
+{
+namespace presence
+{
+
+class PresenceSensor;
+
+/**
+ * @class AnyOf
+ * @brief AnyOf redundancy policy.
+ *
+ * The any of redundancy policy monitors all sensor
+ * states in the redundancy set and reports true when any
+ * sensor in the set reports true.
+ */
+class AnyOf : public RedundancyPolicy
+{
+    public:
+        AnyOf() = delete;
+        AnyOf(const AnyOf&) = default;
+        AnyOf& operator=(const AnyOf&) = default;
+        AnyOf(AnyOf&&) = default;
+        AnyOf& operator=(AnyOf&&) = default;
+        ~AnyOf() = default;
+
+        /**
+         * @brief Construct an any of bitwise policy.
+         *
+         * @param[in] fan - The fan associated with the policy.
+         * @param[in] s - The set of sensors associated with the policy.
+         */
+        AnyOf(
+                const Fan& fan,
+                const std::vector<std::reference_wrapper<PresenceSensor>>& s);
+
+        /**
+         * @brief stateChanged
+         *
+         * Update the inventory and execute the fallback
+         * policy.
+         *
+         * @param[in] present - The new presence state according
+         *             to the specified sensor.
+         * @param[in] sensor - The sensor reporting the new state.
+         */
+        void stateChanged(bool present, PresenceSensor& sensor) override;
+
+        /**
+         * @brief monitor
+         *
+         * Start monitoring the fan.
+         */
+        void monitor() override;
+
+    private:
+
+        /** @brief All presence sensors in the redundancy set. */
+        std::vector<
+            std::tuple<
+                std::reference_wrapper<PresenceSensor>,
+                bool>> state;
+};
+
+} // namespace presence
+} // namespace fan
+} // namespace phosphor