[jira] [Created] (SINGA-55) Refactor main.cc and singa.h to make it easier for users to write driver programs

["wangwei (JIRA)" <ji...@apache.org>]

wangwei created SINGA-55:
----------------------------

             Summary: Refactor main.cc and singa.h to make it easier for users to write driver programs
                 Key: SINGA-55
                 URL: https://issues.apache.org/jira/browse/SINGA-55
             Project: Singa
          Issue Type: Improvement
            Reporter: wangwei


This ticket is a continuation of SINGA-36.

A function singa::Init(argc, argv) will be provided, which should be called at the beginning of the driver program to:

* init glogs, gflags (may remove the dependency on flags later), etc.
* register built-in layers, updaters, workers, params, etc.
* setup folders, e.g., log folder, checkpoint folder, etc.
* init future classes, e.g., MPI environment.

This function can be implemented as a static function in singa.h. singa.h also provides functions to register user classes, e.g., layers. 

The user program would then look like :

{code}
#include "singa.h"

int main(int argc, char** argv) {
  singa::Init(argc, argv);
  singa::RegisterLayer(...);
  singa::RegisterUpdater(...);
  ...
  // prepare job conf
  singa::SubmitJob(...);
  return 0;
}
{code}



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