}

      else if(strcmp(argv[counter], "-t") == 0)

      {

    	  fprintf(stderr, "Entering into test mode...\n\n");

    	  test = 1;

      }

    }

  if(distrend_do_config(argc, argv, &general_info.config))

    return 1;

  /** preset paths */

  _distren_asprintf(&general_info.files.geninfo, "%s/general_info.xml",

		    general_info.config->datadir);

  /** MySQL Connection */

  fprintf(stderr,"Connecting to mysql...\n");

  if(mysqlConnect(&general_info.conn))

    {

      fprintf(stderr, "%s:%d: mysqlConnect() failed\n", __FILE__, __LINE__);

      return 1;

    }

  fprintf(stderr,"Finished connecting!\n");

  /** Execute test function */

  interactiveTest(test, general_info, general_info.conn);

  distrend_listen(general_info.config, &clients);

  int slaveKey = 0; // Remotio should set me on a per-slave basis

  /* Main Loop */

  while(!general_info.config->die)

    {

      int clientsays = 0; /*< temporary example variable, will be replaced when we can handle messages */

      distrend_accept(general_info.config, clients);

      /* Make the following code more event-driven */

      frame_watchdog(&general_info.head);

      struct frameset *frame;

      struct distrenjob *job;

      /* If the client is idle, must be modified for climbing through linked list of clients (client->clientnum) */

      if(clientstatus == CLIENTSTATUS_IDLE)

	{

	  if(returnnum)

	    {

	      fprintf(stderr,"No frames are available to render at this time. Idling...\n");

	      sleep(10);

	    }

	  else

	    remotio_send_to_client(frame->num, job->jobnum); // Pseudo-sends data to client

	}

      /* If the client states that they finished the frame */

      	if(clientsays == DISTREN_REQUEST_DONEFRAME){

      	  clientstatus = CLIENTSTATUS_IDLE; // Sets the client back to idle

      	  finish_frame(general_info.conn, 0, job->jobnum, frame->num); // @TODO: Make sure this actually works.

      	}

    }

  distrend_unlisten(general_info.config->listens, clients);

  distrend_config_free(general_info.config);

  xmlcleanup();

  /** free() paths */

  free(general_info.files.geninfo);

  mysqlDisconnect(general_info.conn);

  return 0;

}

/* ********************** Functions ************************* */

/**

   Performs command stored in a client's request. @TODO: Fill stub

*/

int distrend_do()

{

  return 0;

}

/** Checks for dead, latent, or stale slaves */

void frame_watchdog(struct distrenjob *distrenjob_head)

{

  // Replace with mysqlness, maybe

  // iterate through jobs

    // if the job has been started, checks by seeing if either to first or second frame has been started

    // FRAMESETSTATUS_UNASSIGNED

      // iterate through all frames for this job:

          //watchdog_forgiveness = seconds of forgiveness before frame is re-assigned:

             //   If frame is not completed within the number of seconds specified by watchdog_forgiveness

  */

  xmlTextWriterStartElement(writer, (xmlChar*)"job_list");

  _distren_asprintf(&tmp, "%d", geninfo->timestamp);

  xmlTextWriterWriteAttribute(writer, (xmlChar*)"timestamp", (xmlChar*)tmp);

  free(tmp);

  geninfo->total_priority_pieces = 0;

  counter = 0;

  for(job = geninfo->head.next; job; job = job->next)

    {

      _distren_asprintf(&tmp, "%d", job->jobnum);

      xmlTextWriterWriteElement(writer, (xmlChar*)"jobnum", (xmlChar*)tmp);

      free(tmp);

      /**

        this is needed for the new frame finder to work

        Why the random constant numeral 11? --ohnobinki

      */

      geninfo->total_priority_pieces = geninfo->total_priority_pieces + job->priority;

      counter++;

    }

  xmlTextWriterEndElement(writer);

  /**

     close elements and end document

  */

  xmlTextWriterEndDocument(writer);

  /**

     free writer and save xml file to disk

  */

  xmlFreeTextWriter(writer);

  return 0;

}

/* ************************** Test Functions ************************* */

/** Interactive test for the queuing system */

/* @QUEUE: Test uses methods not present in C code using mysql web-based system */

int interactiveTest(int test, struct general_info general_info, distrend_mysql_conn_t conn){

  int command;

  fprintf(stderr,"Hello!\n");

  int32_t slaveKey = 1;

  int32_t frameNum = 0;

  int32_t newPriority = 0;

  int tmp = 0;

  while(test == 1)

   {

     fprintf(stderr, "Welcome to DistRen Alpha Interactive Test Mode\n\n");

     fprintf(stderr, "\t1 \tGet a frame to render\n");

     fprintf(stderr, "\t2 \tChange job priority\n");

     fprintf(stderr, "\t3 \tSet frame finished\n");

     fprintf(stderr, "\t4 \tSet frame started\n");

     fprintf(stderr, "\t5 \tQuit\n");

     scanf("%d", &command);

     switch(command)

     {

     case 1:

       fprintf(stderr,"Slave Key: ");

       scanf("%d", &slaveKey);

       fprintf(stderr, "Got frame: ");

       find_jobframe(conn, slaveKey, &jobKey, &frameNum);

       fprintf(stderr, "jobKey: %d, frameNum: %d\n",jobKey,frameNum);

       break;

     case 2:

       fprintf(stderr,"Job key: ");

       scanf("%d", &tmp);

       jobKey = tmp;

       fprintf(stderr,"New priority: ");

       scanf("%d", &tmp);

       newPriority = tmp;

       change_job_priority(conn, jobKey, newPriority);

       fprintf(stderr,"Changed!");

       break;

     case 3:

       fprintf(stderr,"Slave Key: ");

       scanf("%d", &tmp);

       slaveKey = tmp;

       fprintf(stderr,"Job Key: ");

       scanf("%d", &tmp);

       jobKey = tmp;

       fprintf(stderr,"Frame Number: ");

       scanf("%d", &tmp);

       frameNum = tmp;

  free(result);

  return 0;

}

/*

   Individual query functions:

 */

void finish_frame(distrend_mysql_conn_t conn, int32_t slavekey, int32_t jobkey, int32_t framenum)

{

  char *query;

  distrend_mysql_result_t result;

  _distren_asprintf(&query, "CALL `distren`.`Frame_Complete`(%d,%d,%d);", slavekey, jobkey, framenum);

  result = mysqlQuery(conn, query);

  free(query);

  mysqlResultFree(result);

}

void start_frame(distrend_mysql_conn_t conn, int32_t slavekey, int32_t jobkey, int32_t framenum)

{

  char *query;

  distrend_mysql_result_t result;

  _distren_asprintf(&query, "CALL `distren`.`Frame_Start`(%d,%d,%d);", slavekey, jobkey, framenum);

  result = mysqlQuery(conn, query);

  free(query);

  mysqlResultFree(result);

}

int change_job_priority(distrend_mysql_conn_t conn, int32_t jobkey, int32_t newpriority)

{

  char *query;

  distrend_mysql_result_t result;

  _distren_asprintf(&query, "UPDATE `distren`.`Job` SET `Priority`=%d WHERE `Job_Key`=%d",

		    newpriority, jobkey);

  result = mysqlQuery(conn, query);

  mysqlResultFree(result);

  return 0;

}

{

  distrend_mysql_result_t result;

  char *query;

  MYSQL_ROW row;

  _distren_asprintf(&query, "CALL `distren`.`Frame_Get`(%d);", slavekey);

  result = mysqlQuery(conn, query);

  free(query);

  if(!result)

    return 1;

  row = mysql_fetch_row(result->mysqlresult);

  if(!row)

    {

      mysqlResultFree(result);

      return 1;

    }

  distrend_mysql_getint(row, 1, framenum);

  mysqlResultFree(result);

  return 0;

}

/*

  Copyright 2009 Nathan Phillip Brink, Ethan Zonca, Matthew Orlando

  This file is a part of DistRen.

  DistRen is free software: you can redistribute it and/or modify

  it under the terms of the GNU Affero General Public License as published by

  the Free Software Foundation, either version 3 of the License, or

  (at your option) any later version.

  DistRen 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 Affero General Public License for more details.

  You should have received a copy of the GNU Affero General Public License

  along with DistRen.  If not, see <http://www.gnu.org/licenses/>.

*/

#ifndef MYSQL_H_

#define MYSQL_H_

#include <stdint.h>

struct distrend_mysql_conn;

struct distrend_mysql_result;

typedef struct distrend_mysql_conn *distrend_mysql_conn_t;

typedef struct distrend_mysql_result *distrend_mysql_result_t;

/**

   initiates a MySQL connection

   @param conn, pointer will be set to the struct

   @return 0 on success

 */

int mysqlConnect(distrend_mysql_conn_t *conn);

/**

   cleans and disconnects MySQL connection

   @param conn connection to clean

   @return 0 on success

*/

int mysqlDisconnect(distrend_mysql_conn_t conn);

/**

   Mark a frame as finished in the database and calculate the seconds spent on that frame.

 */

void finish_frame(distrend_mysql_conn_t conn, int32_t slavekey, int32_t jobkey, int32_t framenum);

/**

   Mark a frame as started in the database and save the time at which it started.

 */

void start_frame(distrend_mysql_conn_t conn, int32_t slavekey, int32_t jobkey, int32_t framenum);

/**

   Changes the priority of an existing (and maybe running) job. @arg head I may end up changing the head if job == head

*/

int change_job_priority(distrend_mysql_conn_t conn, int32_t jobkey, int32_t newpriority);

/**

  Frame Finder: Finds a frame for a slave to render

*/

#endif /* MYSQL_H_ */