transaction.h

   1 /*
   2  * Copyright (C) 2007 Oracle.  All rights reserved.
   3  *
   4  * This program is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU General Public
   6  * License v2 as published by the Free Software Foundation.
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  11  * General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public
  14  * License along with this program; if not, write to the
  15  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  16  * Boston, MA 021110-1307, USA.
  17  */
  18
  19 #ifndef __TRANSACTION__
  20 #define __TRANSACTION__
  21
  22 struct btrfs_trans_handle {
  23         u64 transid;
  24         unsigned long blocks_reserved;
  25         unsigned long blocks_used;
  26 };
  27
  28 static inline struct btrfs_trans_handle *
  29 btrfs_start_transaction(struct btrfs_root *root, int num_blocks)
  30 {
  31         struct btrfs_trans_handle *h = malloc(sizeof(*h));
  32         h->transid = root->root_key.offset;
  33         h->blocks_reserved = num_blocks;
  34         h->blocks_used = 0;
  35         return h;
  36 }
  37
  38 static inline void btrfs_free_transaction(struct btrfs_root *root,
  39                                           struct btrfs_trans_handle *handle)
  40 {
  41         memset(handle, 0, sizeof(*handle));
  42         free(handle);
  43 }
  44
  45 #endif