COMMENTS

IMPORTANT FILES:

 + globals: package containing datastructures and general purpose code.
   - dbio.hpp: look at it, it is obvious what these functions does.
   - graph_types.hpp: contains the definition of graph_database_t and Vertex/Edge.
   - dfs_code.hpp: contains the definition of the DFSCode.
          DFSCode::toGraph(Graph &)
          const RMPath &buildRMPath();
          bool dfs_code_is_min() const;
   - embedding_lists.hpp: contains definition of the embedding lists (as we drawn then on the whiteboard).
   - cuda_graph_types.hpp: contains definition of graph_database_cuda.
           the PURPOSE of this class is to store the graph database (graph_database_t) in the array format (i.e., format
           suitable for usage on the device). The class takes one parameter: bool that says whether the data are stored
           on host or on device. This state is immutable. Further see methods:
           void copy_to_device(graph_database_cuda *device_gdb);
           void copy_from_device(graph_database_cuda *device_gdb);
           void delete_from_host();
           void delete_from_device();
           USAGE: you always have two kind of variables: graph_database_cuda h_gdb(true), d_gdb(false);
           for copying use copy*. For conversion from graph_database_t use graph_database_cuda::create_from_host_representation(graph_database_t &).
           see src/globals/tests/convert_to_device_test.cpp

 + cuda_pp: package containing all cuda parallel primitives that are
            taken (and modified) from the NVidia SDK. 
    further look into these files:
   - kernel_execution.hpp
   - cuda_tools.hpp
   - cuda_computation_parameters.hpp


LOGGER:
--------------
for usage of logger look into the globals/logger_sample.cpp

The logger supports multiple loggers, logging into a file/stdout. It
supports setting of the log level from the command line using the
environment varibale LOG_LEVEL= [NFO|DBG|TRC|TRC1|D|T|T4|...] see
logger.hpp.

Setting the output stream buffer is done using 
static void set_global_streambuf(streambuf *buf, bool set_to_loggers = false);

the argument set_to_loggers allows to set the stream buffer to all existing loggers.

at the end of usage it is good to call Logger::free_loggers();

the logger is directed at compile time using the macros LOG_INFO, LOG_DEBUG, LOG_TRACE.