Vishwanatha Subbanna | 7e14655 | 2017-05-29 17:03:33 +0530 | [diff] [blame] | 1 | #include <chrono> |
| 2 | #include <systemd/sd-event.h> |
| 3 | #include <phosphor-logging/log.hpp> |
Vishwanatha Subbanna | 4d5ef3f | 2017-05-31 18:54:22 +0530 | [diff] [blame] | 4 | #include <phosphor-logging/elog.hpp> |
| 5 | #include <phosphor-logging/elog-errors.hpp> |
| 6 | #include <xyz/openbmc_project/Common/error.hpp> |
Vishwanatha Subbanna | 7e14655 | 2017-05-29 17:03:33 +0530 | [diff] [blame] | 7 | #include "timer.hpp" |
| 8 | namespace phosphor |
| 9 | { |
| 10 | namespace watchdog |
| 11 | { |
| 12 | |
Vishwanatha Subbanna | 4d5ef3f | 2017-05-31 18:54:22 +0530 | [diff] [blame] | 13 | // For throwing exception |
| 14 | using namespace phosphor::logging; |
| 15 | using InternalFailure = sdbusplus::xyz::openbmc_project::Common:: |
| 16 | Error::InternalFailure; |
| 17 | |
Vishwanatha Subbanna | 7e14655 | 2017-05-29 17:03:33 +0530 | [diff] [blame] | 18 | // Initializes the timer object |
| 19 | void Timer::initialize() |
| 20 | { |
| 21 | // This can not be called more than once. |
| 22 | if (eventSource.get()) |
| 23 | { |
Vishwanatha Subbanna | 4d5ef3f | 2017-05-31 18:54:22 +0530 | [diff] [blame] | 24 | log<level::ERR>("Timer already initialized"); |
| 25 | elog<InternalFailure>(); |
Vishwanatha Subbanna | 7e14655 | 2017-05-29 17:03:33 +0530 | [diff] [blame] | 26 | } |
| 27 | |
| 28 | // Add infinite expiration time |
| 29 | decltype(eventSource.get()) sourcePtr = nullptr; |
| 30 | auto r = sd_event_add_time(event.get(), |
| 31 | &sourcePtr, |
| 32 | CLOCK_MONOTONIC, // Time base |
| 33 | UINT64_MAX, // Expire time - way long time |
| 34 | 0, // Use default event accuracy |
| 35 | timeoutHandler, // Callback handler on timeout |
| 36 | this); // User data |
| 37 | eventSource.reset(sourcePtr); |
| 38 | |
| 39 | if (r < 0) |
| 40 | { |
Vishwanatha Subbanna | 4d5ef3f | 2017-05-31 18:54:22 +0530 | [diff] [blame] | 41 | log<level::ERR>("Timer initialization failed"); |
| 42 | elog<InternalFailure>(); |
Vishwanatha Subbanna | 7e14655 | 2017-05-29 17:03:33 +0530 | [diff] [blame] | 43 | } |
| 44 | |
| 45 | // Disable the timer for now |
| 46 | setEnabled<std::false_type>(); |
| 47 | } |
| 48 | |
| 49 | // callback handler on timeout |
| 50 | int Timer::timeoutHandler(sd_event_source* eventSource, |
| 51 | uint64_t usec, void* userData) |
| 52 | { |
| 53 | using namespace phosphor::logging; |
| 54 | |
Vishwanatha Subbanna | 8c5a229 | 2017-05-30 15:34:23 +0530 | [diff] [blame] | 55 | log<level::INFO>("Timer Expired"); |
| 56 | |
Vishwanatha Subbanna | 7e14655 | 2017-05-29 17:03:33 +0530 | [diff] [blame] | 57 | auto timer = static_cast<Timer*>(userData); |
| 58 | timer->expire = true; |
| 59 | |
Vishwanatha Subbanna | 8c5a229 | 2017-05-30 15:34:23 +0530 | [diff] [blame] | 60 | // Call an optional callback function |
| 61 | if(timer->userCallBack) |
| 62 | { |
| 63 | timer->userCallBack(); |
| 64 | } |
Vishwanatha Subbanna | 7e14655 | 2017-05-29 17:03:33 +0530 | [diff] [blame] | 65 | return 0; |
| 66 | } |
| 67 | |
| 68 | // Gets the time from steady_clock |
| 69 | std::chrono::microseconds Timer::getCurrentTime() |
| 70 | { |
| 71 | using namespace std::chrono; |
| 72 | auto usec = steady_clock::now().time_since_epoch(); |
| 73 | return duration_cast<microseconds>(usec); |
| 74 | } |
| 75 | |
| 76 | // Sets the expiration time and arms the timer |
| 77 | void Timer::start(std::chrono::microseconds usec) |
| 78 | { |
Vishwanatha Subbanna | 4d5ef3f | 2017-05-31 18:54:22 +0530 | [diff] [blame] | 79 | using namespace std::chrono; |
| 80 | |
Vishwanatha Subbanna | 7e14655 | 2017-05-29 17:03:33 +0530 | [diff] [blame] | 81 | // Get the current MONOTONIC time and add the delta |
| 82 | auto expireTime = getCurrentTime() + usec; |
| 83 | |
| 84 | // Set the time |
| 85 | auto r = sd_event_source_set_time(eventSource.get(), |
| 86 | expireTime.count()); |
| 87 | if (r < 0) |
| 88 | { |
Vishwanatha Subbanna | 4d5ef3f | 2017-05-31 18:54:22 +0530 | [diff] [blame] | 89 | log<level::ERR>("Error setting the expiration time", |
| 90 | entry("MSEC=%llu",duration_cast<milliseconds>(usec).count())); |
| 91 | elog<InternalFailure>(); |
Vishwanatha Subbanna | 7e14655 | 2017-05-29 17:03:33 +0530 | [diff] [blame] | 92 | } |
| 93 | } |
| 94 | |
| 95 | // Returns current timer enablement type |
| 96 | int Timer::getEnabled() const |
| 97 | { |
| 98 | int enabled{}; |
| 99 | auto r = sd_event_source_get_enabled(eventSource.get(), &enabled); |
| 100 | if (r < 0) |
| 101 | { |
Gunnar Mills | 7512a12 | 2018-04-08 14:30:36 -0500 | [diff] [blame^] | 102 | log<level::ERR>("Error getting current timer type enablement state"); |
Vishwanatha Subbanna | 4d5ef3f | 2017-05-31 18:54:22 +0530 | [diff] [blame] | 103 | elog<InternalFailure>(); |
Vishwanatha Subbanna | 7e14655 | 2017-05-29 17:03:33 +0530 | [diff] [blame] | 104 | } |
| 105 | return enabled; |
| 106 | } |
| 107 | |
| 108 | // Enables / disables the timer |
| 109 | void Timer::setEnabled(int type) |
| 110 | { |
| 111 | auto r = sd_event_source_set_enabled(eventSource.get(), type); |
| 112 | if (r < 0) |
| 113 | { |
Vishwanatha Subbanna | 4d5ef3f | 2017-05-31 18:54:22 +0530 | [diff] [blame] | 114 | log<level::ERR>("Error setting the timer type", |
| 115 | entry("TYPE=%d",type)); |
| 116 | elog<InternalFailure>(); |
Vishwanatha Subbanna | 7e14655 | 2017-05-29 17:03:33 +0530 | [diff] [blame] | 117 | } |
| 118 | } |
| 119 | |
| 120 | // Returns time remaining before expiration |
| 121 | std::chrono::microseconds Timer::getRemaining() const |
| 122 | { |
| 123 | uint64_t next = 0; |
| 124 | auto r = sd_event_source_get_time(eventSource.get(), &next); |
| 125 | if (r < 0) |
| 126 | { |
Vishwanatha Subbanna | 4d5ef3f | 2017-05-31 18:54:22 +0530 | [diff] [blame] | 127 | log<level::ERR>("Error fetching remaining time to expire"); |
| 128 | elog<InternalFailure>(); |
Vishwanatha Subbanna | 7e14655 | 2017-05-29 17:03:33 +0530 | [diff] [blame] | 129 | } |
| 130 | return std::chrono::microseconds(next); |
| 131 | } |
| 132 | |
| 133 | } // namespace watchdog |
| 134 | } // namespace phosphor |