/*
 * Copyright (c) 2019 TAOS Data, Inc. <jhtao@taosdata.com>
 *
 * This program is free software: you can use, redistribute, and/or modify
 * it under the terms of the GNU Affero General Public License, version 3
 * or later ("AGPL"), as published by the Free Software Foundation.
 *
 * This program 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.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef _TD_UTIL_WORKER_H_
#define _TD_UTIL_WORKER_H_

#include "tqueue.h"

#ifdef __cplusplus
extern "C" {
#endif

typedef struct SQWorkerPool SQWorkerPool;
typedef struct SWWorkerPool SWWorkerPool;

typedef struct SQWorker {
  int32_t       id;      // worker ID
  TdThread      thread;  // thread
  SQWorkerPool *pool;
} SQWorker;

typedef struct SQWorkerPool {
  int32_t       max;  // max number of workers
  int32_t       min;  // min number of workers
  int32_t       num;  // current number of workers
  STaosQset    *qset;
  const char   *name;
  SQWorker     *workers;
  TdThreadMutex mutex;
} SQWorkerPool;

typedef struct SWWorker {
  int32_t       id;      // worker id
  TdThread      thread;  // thread
  STaosQall    *qall;
  STaosQset    *qset;  // queue set
  SWWorkerPool *pool;
} SWWorker;

typedef struct SWWorkerPool {
  int32_t       max;  // max number of workers
  int32_t       num;
  int32_t       nextId;  // from 0 to max-1, cyclic
  const char   *name;
  SWWorker     *workers;
  TdThreadMutex mutex;
} SWWorkerPool;

int32_t     tQWorkerInit(SQWorkerPool *pool);
void        tQWorkerCleanup(SQWorkerPool *pool);
STaosQueue *tQWorkerAllocQueue(SQWorkerPool *pool, void *ahandle, FItem fp);
void        tQWorkerFreeQueue(SQWorkerPool *pool, STaosQueue *queue);

int32_t     tWWorkerInit(SWWorkerPool *pool);
void        tWWorkerCleanup(SWWorkerPool *pool);
STaosQueue *tWWorkerAllocQueue(SWWorkerPool *pool, void *ahandle, FItems fp);
void        tWWorkerFreeQueue(SWWorkerPool *pool, STaosQueue *queue);

typedef struct {
  const char *name;
  int32_t     min;
  int32_t     max;
  FItem       fp;
  void       *param;
} SSingleWorkerCfg;

typedef struct {
  const char  *name;
  STaosQueue  *queue;
  SQWorkerPool pool;
} SSingleWorker;

typedef struct {
  const char *name;
  int32_t     max;
  FItems      fp;
  void       *param;
} SMultiWorkerCfg;

typedef struct {
  const char  *name;
  STaosQueue  *queue;
  SWWorkerPool pool;
} SMultiWorker;

int32_t tSingleWorkerInit(SSingleWorker *pWorker, const SSingleWorkerCfg *pCfg);
void    tSingleWorkerCleanup(SSingleWorker *pWorker);
int32_t tMultiWorkerInit(SMultiWorker *pWorker, const SMultiWorkerCfg *pCfg);
void    tMultiWorkerCleanup(SMultiWorker *pWorker);

#ifdef __cplusplus
}
#endif

#endif /*_TD_UTIL_WORKER_H_*/
