implement a generic co-simulation interface

- add client/server transport and message handling
- add co-simulation interface tests

Author: superwhiskers

GridKit/CMakeLists.txt

@@ -25,6 +25,11 @@ install(FILES ${GRIDKIT_THIRD_PARTY_DIR}/magic-enum/LICENSE
 # General Utilities and File IO
 add_subdirectory(Utilities)
 
+if(GRIDKIT_ENABLE_ZMQ)
+  # Co-simulation support
+  add_subdirectory(CoSim)
+endif()
+
 # Memory management utilities
 add_subdirectory(MemoryUtilities)
 

GridKit/CoSim/CMakeLists.txt

@@ -0,0 +1,6 @@
+gridkit_add_library(
+  co_sim
+  SOURCES CoSim.cpp
+  HEADERS CoSim.hpp Message.hpp
+  LINK_LIBRARIES PRIVATE cppzmq
+  INCLUDE_DIRECTORIES PRIVATE ${GRIDKIT_THIRD_PARTY_DIR}/nlohmann-json/include)