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ofs | hex dump | ascii |
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0000 | 89 50 4e 47 0d 0a 1a 0a 00 00 00 0d 49 48 44 52 00 00 00 d5 00 00 00 32 08 06 00 00 00 cb 01 9e | .PNG........IHDR.......2........ |
0020 | b9 00 00 00 19 74 45 58 74 53 6f 66 74 77 61 72 65 00 41 64 6f 62 65 20 49 6d 61 67 65 52 65 61 | .....tEXtSoftware.Adobe.ImageRea |
0040 | 64 79 71 c9 65 3c 00 00 0a af 49 44 41 54 78 da ec 9d 3f 8c e3 c6 15 87 c7 8b 6d 9d f0 e0 c2 69 | dyq.e<....IDATx...?.......m....i |
0060 | 0e e1 75 69 ec d3 a6 f0 c1 b8 62 29 20 31 5c 24 58 29 fd e1 a4 22 07 a4 30 ac 45 00 23 01 0c ac | ..ui......b).1\$X)..."..0.E.#... |
0080 | 04 04 48 60 20 90 d6 2e 0c 9c 8b e5 c2 5d 8a ac 84 a4 08 1c 03 a2 8a 43 60 17 59 5e d2 a4 3b 22 | ..H`.........].........C`.Y^..;" |
00a0 | 6e 92 22 30 13 97 69 f2 9e f2 b8 1e f1 c8 99 37 fc ab 5d cd 03 88 d5 4a 14 87 33 9c 6f de ef bd | n."0..i......../*
* Copyright (C) 2008 Oracle. All rights reserved.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public
* License v2 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. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public
* License along with this program; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 021110-1307, USA.
*/
#ifndef __BTRFS_LOCKING_
#define __BTRFS_LOCKING_
#define BTRFS_WRITE_LOCK 1
#define BTRFS_READ_LOCK 2
#define BTRFS_WRITE_LOCK_BLOCKING 3
#define BTRFS_READ_LOCK_BLOCKING 4
void btrfs_tree_lock(struct extent_buffer *eb);
void btrfs_tree_unlock(struct extent_buffer *eb);
void btrfs_tree_read_lock(struct extent_buffer *eb);
void btrfs_tree_read_unlock(struct extent_buffer *eb);
void btrfs_tree_read_unlock_blocking(struct extent_buffer *eb);
void btrfs_set_lock_blocking_rw(struct extent_buffer *eb, int rw);
void btrfs_clear_lock_blocking_rw(struct extent_buffer *eb, int rw);
void btrfs_assert_tree_locked(struct extent_buffer *eb);
int btrfs_try_tree_read_lock(struct extent_buffer *eb);
int btrfs_try_tree_write_lock(struct extent_buffer *eb);
int btrfs_tree_read_lock_atomic(struct extent_buffer *eb);
static inline void btrfs_tree_unlock_rw(struct extent_buffer *eb, int rw)
{
if (rw == BTRFS_WRITE_LOCK || rw == BTRFS_WRITE_LOCK_BLOCKING)
btrfs_tree_unlock(eb);
else if (rw == BTRFS_READ_LOCK_BLOCKING)
btrfs_tree_read_unlock_blocking(eb);
else if (rw == BTRFS_READ_LOCK)
btrfs_tree_read_unlock(eb);
else
BUG();
}
static inline void btrfs_set_lock_blocking(struct extent_buffer *eb)
{
btrfs_set_lock_blocking_rw(eb, BTRFS_WRITE_LOCK);
}
static inline void btrfs_clear_lock_blocking(struct extent_buffer *eb)
{
btrfs_clear_lock_blocking_rw(eb, BTRFS_WRITE_LOCK_BLOCKING);
}
#endif
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