Add routines to start and stop the sd_event timer
Change-Id: I738be7b70554125e544aa59fe1770e909d3dffb1
Signed-off-by: Vishwanatha Subbanna <vishwa@linux.vnet.ibm.com>
diff --git a/softoff/timer.cpp b/softoff/timer.cpp
index 9e722f1..c626536 100644
--- a/softoff/timer.cpp
+++ b/softoff/timer.cpp
@@ -1,3 +1,4 @@
+#include <chrono>
#include <phosphor-logging/log.hpp>
#include "timer.hpp"
namespace phosphor
@@ -19,7 +20,7 @@
// Add infinite expiration time
auto r = sd_event_add_time(timeEvent, &eventSource,
CLOCK_MONOTONIC, // Time base
- UINT64_MAX, // Expire time - way long enough time
+ UINT64_MAX, // Expire time - way long time
0, // Use default event accuracy
timeoutHandler, // Callback handler on timeout
this); // User data
@@ -32,13 +33,13 @@
}
// Disable the timer for now
- r = sd_event_source_set_enabled(eventSource, SD_EVENT_OFF);
+ r = setTimer(SD_EVENT_OFF);
if (r < 0)
{
log<level::ERR>("Failure to disable timer",
entry("ERROR=%s", strerror(-r)));
- throw std::runtime_error("Setting initial timer value failed");
+ throw std::runtime_error("Disabling the timer failed");
}
return;
}
@@ -54,5 +55,48 @@
return 0;
}
+// Gets the time from steady_clock
+std::chrono::microseconds Timer::getTime()
+{
+ using namespace std::chrono;
+ auto usec = steady_clock::now().time_since_epoch();
+ return duration_cast<microseconds>(usec);
+}
+
+// Enables or disables the timer
+int Timer::setTimer(int action)
+{
+ return sd_event_source_set_enabled(eventSource, action);
+}
+
+// Sets the time and arms the timer
+int Timer::startTimer(std::chrono::microseconds timeValue)
+{
+ // Disable the timer
+ setTimer(SD_EVENT_OFF);
+
+ // Get the current MONOTONIC time and add the delta
+ auto expireTime = getTime() + timeValue;
+
+ // Set the time
+ auto r = sd_event_source_set_time(eventSource, expireTime.count());
+ if (r < 0)
+ {
+ log<level::ERR>("Failure to set timer",
+ entry("ERROR=%s", strerror(-r)));
+ return r;
+ }
+
+ // A ONESHOT timer means that when the timer goes off,
+ // its moves to disabled state.
+ r = setTimer(SD_EVENT_ONESHOT);
+ if (r < 0)
+ {
+ log<level::ERR>("Failure to start timer",
+ entry("ERROR=%s", strerror(-r)));
+ }
+ return r;
+}
+
} // namespace ipmi
} // namespace phosphor