search_hooktask.cc

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/*
Copyright (c) by respective owners including Yahoo!, Microsoft, and
individual contributors. All rights reserved.  Released under a BSD (revised)
license as described in the file LICENSE.
 */
#include "search_hooktask.h"

using namespace VW::config;

// this is used for the C++ library and python library hook; hopefully
// it can be used for any foreign library too!
namespace HookTask
{
Search::search_task task = {"hook", run, initialize, finish, run_setup, run_takedown};

void initialize(Search::search& sch, size_t& num_actions, options_i& arg)
{
  task_data* td = new task_data;
  td->run_f = nullptr;
  td->run_setup_f = nullptr;
  td->run_takedown_f = nullptr;
  td->run_object = nullptr;
  td->setup_object = nullptr;
  td->takedown_object = nullptr;
  td->delete_run_object = nullptr;
  td->delete_extra_data = nullptr;
  td->num_actions = num_actions;
  td->arg = &arg;
  sch.set_task_data<task_data>(td);
}

void finish(Search::search& sch)
{
  task_data* td = sch.get_task_data<task_data>();
  if (td->delete_run_object)
  {
    if (td->run_object)
      td->delete_run_object(td->run_object);
    if (td->setup_object)
      td->delete_run_object(td->setup_object);
    if (td->takedown_object)
      td->delete_run_object(td->takedown_object);
  }
  if (td->delete_extra_data)
    td->delete_extra_data(*td);
  delete td;
}

void run(Search::search& sch, multi_ex& /*ec*/)
{
  task_data* td = sch.get_task_data<task_data>();
  if (td->run_f)
    td->run_f(sch);
  else
    std::cerr << "warning: HookTask::structured_predict called before hook is set" << std::endl;
}

void run_setup(Search::search& sch, multi_ex& /*ec*/)
{
  task_data* td = sch.get_task_data<task_data>();
  if (td->run_setup_f)
    td->run_setup_f(sch);
}

void run_takedown(Search::search& sch, multi_ex& /*ec*/)
{
  task_data* td = sch.get_task_data<task_data>();
  if (td->run_takedown_f)
    td->run_takedown_f(sch);
}
}  // namespace HookTask