Vishwanatha Subbanna | 4c8c72b | 2016-11-29 23:02:06 +0530 | [diff] [blame^] | 1 | #pragma once |
| 2 | |
| 3 | #include <map> |
| 4 | #include <set> |
| 5 | namespace phosphor |
| 6 | { |
| 7 | namespace led |
| 8 | { |
| 9 | |
| 10 | /** @class Manager |
| 11 | * @brief Manages group of LEDs and applies action on the elements of group |
| 12 | */ |
| 13 | class Manager |
| 14 | { |
| 15 | public: |
| 16 | /** @brief Define possible actions on a given LED. |
| 17 | * For the BLINK operation, follow 50-50 duty cycle |
| 18 | */ |
| 19 | enum Action |
| 20 | { |
| 21 | Off, |
| 22 | On, |
| 23 | Blink, |
| 24 | }; |
| 25 | |
| 26 | /** @brief Only need the default Manager */ |
| 27 | Manager() = default; |
| 28 | ~Manager() = default; |
| 29 | Manager(const Manager&) = delete; |
| 30 | Manager& operator=(const Manager&) = delete; |
| 31 | Manager(Manager&&) = delete; |
| 32 | Manager& operator=(Manager&&) = delete; |
| 33 | |
| 34 | /** @brief Name of the LED and it's proposed action. |
| 35 | * This structure is supplied as configuration at build time |
| 36 | */ |
| 37 | struct LedAction |
| 38 | { |
| 39 | std::string name; |
| 40 | Action action; |
| 41 | |
| 42 | // Needed for inserting elements into sets |
| 43 | bool operator<(const LedAction& right) const |
| 44 | { |
| 45 | if (name == right.name) |
| 46 | { |
| 47 | return action < right.action; |
| 48 | } |
| 49 | return name < right.name; |
| 50 | } |
| 51 | }; |
| 52 | |
| 53 | /** @brief For finding intersection */ |
| 54 | static bool ledComp(const LedAction& left, const LedAction& right) |
| 55 | { |
| 56 | return left.name < right.name; |
| 57 | } |
| 58 | |
| 59 | using group = std::set<LedAction>; |
| 60 | |
| 61 | /** @brief static global map constructed at compile time */ |
| 62 | static const std::map<std::string, group> ledMap; |
| 63 | |
| 64 | /** @brief Given a group name, applies the action on the group |
| 65 | * |
| 66 | * @param[in] path - dbus path of group |
| 67 | * @param[in] assert - Could be true or false |
| 68 | * @return - Success or exception thrown |
| 69 | */ |
| 70 | bool setGroupState(const std::string& path, bool assert); |
| 71 | |
| 72 | private: |
| 73 | /** @brief Pointers to groups that are in asserted state */ |
| 74 | std::set<const group*> assertedGroups; |
| 75 | |
| 76 | /** @brief Contains the LEDs that are in asserted state */ |
| 77 | group currentState; |
| 78 | |
| 79 | /** @brief Finds the set of LEDs to operate on and executes action |
| 80 | * |
| 81 | * @return: None |
| 82 | */ |
| 83 | void driveLEDs(); |
| 84 | }; |
| 85 | |
| 86 | } // namespace led |
| 87 | } // namespace phosphor |