1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
|
# Copyright (c) 2015 SUSE LINUX GmbH, Nuernberg, Germany.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# 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, see <http://www.gnu.org/licenses/>.
## synchronization API
package lockapi;
use strict;
use warnings;
use base qw/Exporter/;
our @EXPORT = qw/mutex_create mutex_lock mutex_unlock mutex_try_lock/;
require bmwqemu;
use mmapi qw/api_call/;
sub mutex_lock {
my ($name, $where) = @_;
bmwqemu::diag("mutex lock '$name'");
while (1) {
my $param = {action => 'lock'};
$param->{where} = $where if $where;
my $res = api_call('post', "mutex/$name", $param)->code;
return 1 if ($res == 200);
bmwqemu::mydie "mutex lock '$name': lock owner already finished" if $res == 410;
if ($res != 409) {
bmwqemu::fctwarn("Unknown return code $res for lock api");
return 0;
}
bmwqemu::diag("mutex lock '$name' unavailable, sleeping 5s");
sleep(5);
}
}
sub mutex_try_lock {
my ($name, $where) = @_;
bmwqemu::diag("mutex try lock '$name'");
my $param = {action => 'lock'};
$param->{where} = $where if $where;
my $res = api_call('post', "mutex/$name", $param)->code;
return 1 if ($res == 200);
die "mutex lock '$name': lock owner already finished" if $res == 410;
if ($res != 409) {
bmwqemu::fctwarn("Unknown return code $res for lock api");
}
return 0;
}
sub mutex_unlock {
my ($name) = @_;
bmwqemu::diag("mutex unlock '$name'");
my $res = api_call('post', "mutex/$name", {action => 'unlock'})->code;
return 1 if ($res == 200);
bmwqemu::fctwarn("Unknown return code $res for lock api") if ($res != 409);
return 0;
}
sub mutex_create {
my ($name) = @_;
bmwqemu::diag("mutex create '$name'");
my $res = api_call('post', "mutex", {name => $name})->code;
return 1 if ($res == 200);
bmwqemu::fctwarn("Unknown return code $res for lock api") if ($res != 409);
return 0;
}
1;
|
