Commit | Line | Data |
460b1067 |
1 | package DBM::Deep::File; |
2 | |
3 | use 5.6.0; |
4 | |
5 | use strict; |
6 | use warnings; |
7 | |
8 | use Fcntl qw( :DEFAULT :flock :seek ); |
9 | |
10 | our $VERSION = '0.01'; |
11 | |
12 | sub new { |
13 | my $class = shift; |
14 | my ($args) = @_; |
15 | |
16 | my $self = bless { |
17 | autobless => undef, |
18 | autoflush => undef, |
19 | end => 0, |
20 | fh => undef, |
21 | file => undef, |
22 | file_offset => 0, |
23 | locking => undef, |
24 | locked => 0, |
25 | filter_store_key => undef, |
26 | filter_store_value => undef, |
27 | filter_fetch_key => undef, |
28 | filter_fetch_value => undef, |
28394a1a |
29 | |
30 | transaction_id => 0, |
460b1067 |
31 | }, $class; |
32 | |
33 | # Grab the parameters we want to use |
34 | foreach my $param ( keys %$self ) { |
35 | next unless exists $args->{$param}; |
36 | $self->{$param} = $args->{$param}; |
37 | } |
38 | |
39 | if ( $self->{fh} && !$self->{file_offset} ) { |
40 | $self->{file_offset} = tell( $self->{fh} ); |
41 | } |
42 | |
43 | $self->open unless $self->{fh}; |
44 | |
45 | return $self; |
46 | } |
47 | |
48 | sub open { |
49 | my $self = shift; |
50 | |
51 | # Adding O_BINARY does remove the need for the binmode below. However, |
52 | # I'm not going to remove it because I don't have the Win32 chops to be |
53 | # absolutely certain everything will be ok. |
54 | my $flags = O_RDWR | O_CREAT | O_BINARY; |
55 | |
56 | my $fh; |
57 | sysopen( $fh, $self->{file}, $flags ) |
58 | or die "DBM::Deep: Cannot sysopen file '$self->{file}': $!\n"; |
59 | $self->{fh} = $fh; |
60 | |
61 | # Even though we use O_BINARY, better be safe than sorry. |
62 | binmode $fh; |
63 | |
64 | if ($self->{autoflush}) { |
65 | my $old = select $fh; |
66 | $|=1; |
67 | select $old; |
68 | } |
69 | |
70 | return 1; |
71 | } |
72 | |
73 | sub close { |
74 | my $self = shift; |
75 | |
76 | if ( $self->{fh} ) { |
77 | close $self->{fh}; |
78 | $self->{fh} = undef; |
79 | } |
80 | |
81 | return 1; |
82 | } |
83 | |
84 | sub DESTROY { |
85 | my $self = shift; |
86 | return unless $self; |
87 | |
88 | $self->close; |
89 | |
90 | return; |
91 | } |
92 | |
28394a1a |
93 | sub begin_transaction { |
94 | my $self = shift; |
95 | |
96 | $self->{transaction_id}++; |
97 | } |
98 | |
99 | sub end_transaction { |
100 | my $self = shift; |
101 | |
102 | $self->{transaction_id} = 0; |
103 | } |
104 | |
105 | sub transaction_id { |
106 | my $self = shift; |
107 | |
108 | return $self->{transaction_id}; |
109 | } |
110 | |
111 | #sub commit { |
112 | #} |
113 | |
460b1067 |
114 | 1; |
115 | __END__ |
116 | |