Commit | Line | Data |
f0276afb |
1 | package DBM::Deep::Engine::Sector; |
2 | |
3 | use 5.006_000; |
4 | |
5 | use strict; |
6 | use warnings FATAL => 'all'; |
7 | |
5ae752e2 |
8 | my $STALE_SIZE = 2; |
9 | |
10 | # Please refer to the pack() documentation for further information |
11 | my %StP = ( |
12 | 1 => 'C', # Unsigned char value (no order needed as it's just one byte) |
13 | 2 => 'n', # Unsigned short in "network" (big-endian) order |
14 | 4 => 'N', # Unsigned long in "network" (big-endian) order |
15 | 8 => 'Q', # Usigned quad (no order specified, presumably machine-dependent) |
16 | ); |
17 | |
f0276afb |
18 | sub new { |
19 | my $self = bless $_[1], $_[0]; |
20 | Scalar::Util::weaken( $self->{engine} ); |
21 | $self->_init; |
22 | return $self; |
23 | } |
24 | |
25 | #sub _init {} |
26 | #sub clone { DBM::Deep->_throw_error( "Must be implemented in the child class" ); } |
27 | |
28 | sub engine { $_[0]{engine} } |
29 | sub offset { $_[0]{offset} } |
30 | sub type { $_[0]{type} } |
31 | |
32 | sub base_size { |
33 | my $self = shift; |
34 | return $self->engine->SIG_SIZE + $STALE_SIZE; |
35 | } |
36 | |
37 | sub free { |
38 | my $self = shift; |
39 | |
40 | my $e = $self->engine; |
41 | |
42 | $e->storage->print_at( $self->offset, $e->SIG_FREE ); |
43 | # Skip staleness counter |
44 | $e->storage->print_at( $self->offset + $self->base_size, |
45 | chr(0) x ($self->size - $self->base_size), |
46 | ); |
47 | |
48 | my $free_meth = $self->free_meth; |
49 | $e->$free_meth( $self->offset, $self->size ); |
50 | |
51 | return; |
52 | } |
53 | |
54 | 1; |
55 | __END__ |