| Overview |  |
Copyright © 2010-2012 Zuse Institute Berlin and onScale solutions GmbH
Version: $Id$
Authors: Florian Schintke (schintke@onscale.de).
client_version() = non_neg_integer()
only for unit tests:
entry() = entry_ex() | entry_empty()
entry_empty() =
{Key :: rt_chord:key(),
empty_val | db_dht:value(),
WriteLock :: false | -1 | client_version(),
ReadLock :: non_neg_integer(),
Version :: -1}
entry_ex() =
{Key :: rt_chord:key(),
Value :: db_dht:value(),
WriteLock :: false | client_version(),
ReadLock :: non_neg_integer(),
Version :: client_version()}
| dec_readlock/1 | |
| dec_version/1 | |
| get_key/1 | |
| get_readlock/1 | |
| get_value/1 | |
| get_version/1 | |
| get_writelock/1 | |
| inc_readlock/1 | |
| inc_version/1 | |
| is_empty/1 | Returns whether the item is an empty_val item with version -1. |
| is_locked/1 | |
| is_null/1 | Returns whether the item is an empty_val item with version -1 and no read or write locks. |
| lockcount/1 | Returns how many read and write locks are currently set. |
| new/1 | |
| new/3 | |
| reset_locks/1 | |
| set_value/3 | |
| set_writelock/2 | |
| unset_writelock/1 |
new(Key :: rt_chord:key()) -> {rt_chord:key(), empty_val, false, 0, -1}
new(Key :: rt_chord:key(), Value :: db_dht:value(), Version :: client_version()) -> {Key :: rt_chord:key(), Value :: db_dht:value(), WriteLock :: false, ReadLock :: 0, Version :: client_version()}
get_key(DBEntry :: entry()) -> rt_chord:key()
get_value(DBEntry :: entry()) -> db_dht:value()
set_value(DBEntry :: entry(), Value :: db_dht:value(), Version :: client_version()) -> entry()
get_writelock(DBEntry :: entry()) -> WriteLock :: false | -1 | client_version()
set_writelock(DBEntry :: entry_ex(), WriteLock :: false | client_version()) -> entry_ex()
get_readlock(DBEntry :: entry()) -> ReadLock :: non_neg_integer()
get_version(DBEntry :: entry()) -> client_version() | -1
reset_locks(DBEntry :: entry()) -> {Key :: rt_chord:key(), Value :: db_dht:value(), WriteLock :: false, ReadLock :: 0, Version :: client_version()} | {Key :: rt_chord:key(), empty_val | db_dht:value(), WriteLock :: false, ReadLock :: 0, Version :: -1}
is_locked(DBEntry :: entry()) -> boolean()
is_empty(X1 :: entry()) -> boolean()
Returns whether the item is an empty_val item with version -1. Note: The number of read or write locks does not matter here!
is_null(X1 :: entry()) -> boolean()
Returns whether the item is an empty_val item with version -1 and no read or write locks.
lockcount(Entry :: db_entry:entry()) -> integer()
Returns how many read and write locks are currently set.
Generated by EDoc, Feb 29 2016, 16:12:20.