Initial implementation of Low Voltage feature

Implemented Low Voltage feature based on POSIX
real-time signals

3 files changed, 21 insertions, 0 deletions

diff --git a/src/components/utils/CMakeLists.txt b/src/components/utils/CMakeLists.txt
index ed90c6fb45..a6ded9a186 100644
--- a/src/components/utils/CMakeLists.txt
+++ b/src/components/utils/CMakeLists.txt
@@ -40,6 +40,7 @@ include_directories (
   ${COMPONENTS_DIR}/protocol_handler/include
   ${JSONCPP_INCLUDE_DIRECTORY}
   ${LOG4CXX_INCLUDE_DIRECTORY}
+  ${CMAKE_SOURCE_DIR}/src
 )
 
 # dbms
diff --git a/src/components/utils/include/utils/signals.h b/src/components/utils/include/utils/signals.h
index e413a2576f..4efdaaa4e8 100644
--- a/src/components/utils/include/utils/signals.h
+++ b/src/components/utils/include/utils/signals.h
@@ -38,11 +38,14 @@ typedef void (*sighandler_t)(int);
 #else
 #include <signal.h>
 #endif
+#include "appMain/low_voltage_signals_handler.h"
 
 namespace utils {
 
 bool UnsubscribeFromTermination();
 bool WaitTerminationSignals(sighandler_t sig_handler);
+bool UnsubscribeFromLowVoltageSignals(
+    const main_namespace::LowVoltageSignalsOffset& offset_data);
 
 }  //  namespace utils
 
diff --git a/src/components/utils/src/signals_posix.cc b/src/components/utils/src/signals_posix.cc
index 45923e4f9b..dd569a96d6 100644
--- a/src/components/utils/src/signals_posix.cc
+++ b/src/components/utils/src/signals_posix.cc
@@ -51,6 +51,23 @@ bool utils::UnsubscribeFromTermination() {
   return !pthread_sigmask(SIG_BLOCK, &signal_set, NULL);
 }
 
+bool utils::UnsubscribeFromLowVoltageSignals(
+    const main_namespace::LowVoltageSignalsOffset& offset_data) {
+  // Disable Low Voltage signals in main thread
+  // due to all further threads will inherit signals mask
+  sigset_t signal_set;
+  sigemptyset(&signal_set);
+  const int SIGLOWVOLTAGE = SIGRTMIN + offset_data.low_voltage_signal_offset;
+  const int SIGWAKEUP = SIGRTMIN + offset_data.wake_up_signal_offset;
+  const int SIGIGNOFF = SIGRTMIN + offset_data.ignition_off_signal_offset;
+  sigaddset(&signal_set, SIGLOWVOLTAGE);
+  sigaddset(&signal_set, SIGWAKEUP);
+  sigaddset(&signal_set, SIGIGNOFF);
+
+  // Set signals mask to be blocked by thread
+  return !pthread_sigmask(SIG_BLOCK, &signal_set, nullptr);
+}
+
 namespace {
 bool CatchSIGSEGV(sighandler_t handler) {
   struct sigaction act;