Introduce interval configuration for sensor reads.

This introduces the ability to specify in the sensor label configuration
file, a specific sleep interval.  The interval is in this file to allow
straightforward interval control over the sensors listed in that file.
Sensors grouped in the same file are treated as a group and run within
the same instance.

Tested: I tested setting the interval in one of four running
configurations and the change was picked up in that configuration while
the others ran at the default interval.

Resolves openbmc/phosphor-hwmon#5

Change-Id: Ia9e474bc446090c8ac95dc2e6bf23a4fd6ccf7b7
Signed-off-by: Patrick Venture <venture@google.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/mainloop.hpp b/mainloop.hpp
index f48e590..d4ef2c4 100644
--- a/mainloop.hpp
+++ b/mainloop.hpp
@@ -7,6 +7,8 @@
 #include "sensorset.hpp"
 #include "interface.hpp"
 
+static constexpr auto default_interval = 1000000;
+
 using Object = std::map<InterfaceType, std::experimental::any>;
 using ObjectInfo = std::tuple<sdbusplus::bus::bus*, std::string, Object>;
 
@@ -71,4 +73,6 @@ class MainLoop
         const char* _root;
         /** @brief DBus object state. */
         SensorState state;
+        /** @brief Sleep interval in microseconds. */
+        uint64_t _interval = default_interval;
 };