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#pragma once
#include <sdbusplus/message.hpp>
#include <sdbusplus/bus/match.hpp>
#include <string>
#include <vector>
#include "psensor.hpp"
#include "sdbusplus.hpp"
namespace phosphor
{
namespace fan
{
namespace presence
{
class RedundancyPolicy;
/**
* @class Tach
* @brief Fan tach sensor presence implementation.
*
* The Tach class uses one or more tach speed indicators
* to determine presence state.
*/
class Tach : public PresenceSensor
{
public:
/**
* @brief
*
* Cannot move or copy due to this ptr as context
* for sdbus callbacks.
*/
Tach() = delete;
Tach(const Tach&) = delete;
Tach& operator=(const Tach&) = delete;
Tach(Tach&&) = delete;
Tach& operator=(Tach&&) = delete;
~Tach() = default;
/**
* @brief ctor
*
* @param[in] sensors - Fan tach sensors for this psensor.
*/
Tach(const std::vector<std::string>& sensors);
/**
* @brief start
*
* Register for dbus signal callbacks on fan
* tach sensor change. Query initial tach speeds.
*
* @return The current sensor state.
*/
bool start() override;
/**
* @brief stop
*
* De-register dbus signal callbacks.
*/
void stop() override;
/**
* @brief Check the sensor.
*
* Query the tach speeds.
*/
bool present() override;
private :
/**
* @brief Get the policy associated with this sensor.
*/
virtual RedundancyPolicy& getPolicy() = 0;
/**
* @brief Properties changed handler for tach sensor updates.
*
* @param[in] sensor - The sensor that changed.
* @param[in] props - The properties that changed.
*/
void propertiesChanged(
size_t sensor,
const phosphor::fan::util::Properties<int64_t>& props);
/**
* @brief Properties changed handler for tach sensor updates.
*
* @param[in] sensor - The sensor that changed.
* @param[in] msg - The sdbusplus signal message.
*/
void propertiesChanged(
size_t sensor,
sdbusplus::message::message& msg);
/** @brief array of tach sensors dbus matches, and tach values. */
std::vector<std::tuple<
std::string,
std::unique_ptr<sdbusplus::bus::match::match>,
int64_t>> state;
/** The current state of the sensor. */
bool currentState;
};
} // namespace presence
} // namespace fan
} // namespace phosphor
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