Revised GPIO module interface + GPIO discovery logic
* The GpioHandler class is no longer a static singleton, rather an
ordinary object with a dynamic guard against multiple instances. This
makes testing/mocking a lot easier and simplifies implementation.
* It uses a basic, mockable udev interface; the module comes with
complete unit testing of the discovery mechanism.
* Corresponding changes to user classes, including UpdateAttempter and
UpdateCheckScheduler.
Note that the implementation of the test mode signaling protocol is
currently a no-op, always returning false, and hence has no effect on
the update process yet. This mechanism will be implemented in a later
CL.
BUG=chromium-os:25397
TEST=Builds and passes unit tests (including new ones)
Change-Id: I2f6254db6799ff5ef8616314890833f6e3269ff6
Reviewed-on: https://gerrit.chromium.org/gerrit/22869
Reviewed-by: Gilad Arnold <garnold@chromium.org>
Tested-by: Gilad Arnold <garnold@chromium.org>
Commit-Ready: Gilad Arnold <garnold@chromium.org>
diff --git a/SConstruct b/SConstruct
index 0030bd5..a79a8a8 100644
--- a/SConstruct
+++ b/SConstruct
@@ -304,6 +304,8 @@
filesystem_iterator_unittest.cc
flimflam_proxy_unittest.cc
full_update_generator_unittest.cc
+ gpio_handler_unittest.cc
+ gpio_mock_udev_interface.cc
graph_utils_unittest.cc
http_fetcher_unittest.cc
metadata_unittest.cc