RetroArch/tasks/task_powerstate.c

/*  RetroArch - A frontend for libretro.
 *  Copyright (C) 2010-2014 - Hans-Kristian Arntzen
 *  Copyright (C) 2011-2017 - Daniel De Matteis
 *  Copyright (C) 2016-2019 - Brad Parker
 *
 *  RetroArch is free software: you can redistribute it and/or modify it under the terms
 *  of the GNU General Public License as published by the Free Software Found-
 *  ation, either version 3 of the License, or (at your option) any later version.
 *
 *  RetroArch is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
 *  without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
 *  PURPOSE.  See the GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License along with RetroArch.
 *  If not, see <http://www.gnu.org/licenses/>.
 */

#include <stdlib.h>

#include <queues/task_queue.h>

#include "../../frontend/frontend_driver.h"
#include "tasks_internal.h"

typedef struct powerstate powerstate_t;

struct powerstate
{
   int percent;
   enum frontend_powerstate state;
};

/* TODO/FIXME - global state - perhaps move outside this file */
static int              powerstate_percent        = 0;
static enum frontend_powerstate powerstate_status = FRONTEND_POWERSTATE_NONE;

enum frontend_powerstate get_last_powerstate(int *percent)
{
   if (percent)
      *percent = powerstate_percent;

   return powerstate_status;
}

static void task_powerstate_cb(retro_task_t *task,
      void *task_data,
      void *user_data, const char *error)
{
   powerstate_t *powerstate = (powerstate_t*)task_data;

   powerstate_percent = powerstate->percent;
   powerstate_status  = powerstate->state;

   free(powerstate);
}

static void task_powerstate_handler(retro_task_t *task)
{
   const frontend_ctx_driver_t *frontend = frontend_get_ptr();
   powerstate_t *powerstate = (powerstate_t*)task->state;

   if (frontend && frontend->get_powerstate)
   {
      int seconds       = 0;
      powerstate->state = frontend->get_powerstate(
            &seconds, &powerstate->percent);
   }

   task_set_data(task, powerstate);
   task_set_finished(task, true);
}

void task_push_get_powerstate(void)
{
   retro_task_t *task  = task_init();
   powerstate_t *state = NULL;

   if (!task)
      return;
   state = (powerstate_t*)calloc(1, sizeof(*state));
   if (!state)
   {
      free(task);
      return;
   }

   task->type     = TASK_TYPE_NONE;
   task->state    = state;
   task->handler  = task_powerstate_handler;
   task->callback = task_powerstate_cb;
   task->mute     = true;

   task_queue_push(task);
}