1 /** 2 * Copyright 2017 Google Inc. 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 #include "dbuspassive.hpp" 17 18 #include "dbus/util.hpp" 19 20 #include <chrono> 21 #include <cmath> 22 #include <memory> 23 #include <mutex> 24 #include <sdbusplus/bus.hpp> 25 #include <string> 26 27 std::unique_ptr<ReadInterface> DbusPassive::CreateDbusPassive( 28 sdbusplus::bus::bus& bus, const std::string& type, const std::string& id, 29 DbusHelperInterface* helper) 30 { 31 if (helper == nullptr) 32 { 33 return nullptr; 34 } 35 if (!ValidType(type)) 36 { 37 return nullptr; 38 } 39 40 return std::make_unique<DbusPassive>(bus, type, id, helper); 41 } 42 43 DbusPassive::DbusPassive(sdbusplus::bus::bus& bus, const std::string& type, 44 const std::string& id, DbusHelperInterface* helper) : 45 ReadInterface(), 46 _bus(bus), _signal(bus, GetMatch(type, id).c_str(), DbusHandleSignal, this), 47 _id(id), _helper(helper) 48 { 49 /* Need to get the scale and initial value */ 50 auto tempBus = sdbusplus::bus::new_default(); 51 /* service == busname */ 52 std::string path = GetSensorPath(type, id); 53 std::string service = _helper->GetService(tempBus, sensorintf, path); 54 55 struct SensorProperties settings; 56 _helper->GetProperties(tempBus, service, path, &settings); 57 58 _scale = settings.scale; 59 _value = settings.value * pow(10, _scale); 60 _updated = std::chrono::high_resolution_clock::now(); 61 } 62 63 ReadReturn DbusPassive::read(void) 64 { 65 std::lock_guard<std::mutex> guard(_lock); 66 67 struct ReadReturn r = {_value, _updated}; 68 69 return r; 70 } 71 72 void DbusPassive::setValue(double value) 73 { 74 std::lock_guard<std::mutex> guard(_lock); 75 76 _value = value; 77 _updated = std::chrono::high_resolution_clock::now(); 78 } 79 80 int64_t DbusPassive::getScale(void) 81 { 82 return _scale; 83 } 84 85 std::string DbusPassive::getId(void) 86 { 87 return _id; 88 } 89 90 int HandleSensorValue(sdbusplus::message::message& msg, DbusPassive* owner) 91 { 92 std::string msgSensor; 93 std::map<std::string, sdbusplus::message::variant<int64_t, double>> msgData; 94 95 msg.read(msgSensor, msgData); 96 97 if (msgSensor == "xyz.openbmc_project.Sensor.Value") 98 { 99 auto valPropMap = msgData.find("Value"); 100 if (valPropMap != msgData.end()) 101 { 102 double value = mapbox::util::apply_visitor(VariantToDoubleVisitor(), 103 valPropMap->second); 104 105 value *= std::pow(10, owner->getScale()); 106 107 owner->setValue(value); 108 } 109 } 110 111 return 0; 112 } 113 114 int DbusHandleSignal(sd_bus_message* msg, void* usrData, sd_bus_error* err) 115 { 116 auto sdbpMsg = sdbusplus::message::message(msg); 117 DbusPassive* obj = static_cast<DbusPassive*>(usrData); 118 119 return HandleSensorValue(sdbpMsg, obj); 120 } 121