/*
 * 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/>.
 */

#include "meta.h"

static FORCE_INLINE void *metaMalloc(void *pPool, size_t size) {
  return vnodeBufPoolMallocAligned((SVBufPool *)pPool, size);
}
static FORCE_INLINE void metaFree(void *pPool, void *p) { vnodeBufPoolFree((SVBufPool *)pPool, p); }

// begin a meta txn
int metaBegin(SMeta *pMeta, int8_t heap) {
  void *(*xMalloc)(void *, size_t) = NULL;
  void (*xFree)(void *, void *) = NULL;
  void *xArg = NULL;

  // default heap to META_BEGIN_HEAP_NIL
  if (heap == META_BEGIN_HEAP_OS) {
    xMalloc = tdbDefaultMalloc;
    xFree = tdbDefaultFree;
  } else if (heap == META_BEGIN_HEAP_BUFFERPOOL) {
    xMalloc = metaMalloc;
    xFree = metaFree;
    xArg = pMeta->pVnode->inUse;
  }

  if (tdbBegin(pMeta->pEnv, &pMeta->txn, xMalloc, xFree, xArg, TDB_TXN_WRITE | TDB_TXN_READ_UNCOMMITTED) < 0) {
    return -1;
  }

  return 0;
}

// commit the meta txn
TXN *metaGetTxn(SMeta *pMeta) { return pMeta->txn; }
int  metaCommit(SMeta *pMeta, TXN *txn) { return tdbCommit(pMeta->pEnv, txn); }
int  metaFinishCommit(SMeta *pMeta, TXN *txn) { return tdbPostCommit(pMeta->pEnv, txn); }
int  metaPrepareAsyncCommit(SMeta *pMeta) {
   // return tdbPrepareAsyncCommit(pMeta->pEnv, pMeta->txn);
  int code = 0;
  code = tdbCommit(pMeta->pEnv, pMeta->txn);

  return code;
}

// abort the meta txn
int metaAbort(SMeta *pMeta) {
  if (!pMeta->txn) return 0;
  return tdbAbort(pMeta->pEnv, pMeta->txn);
}