/usr/share/perl5/Test2/IPC/Driver.pm is in libtest2-perl 0.000025-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 | package Test2::IPC::Driver;
use strict;
use warnings;
use Carp qw/confess longmess/;
use Test2::Util::HashBase qw{no_fatal};
use Test2::API qw/test2_ipc_add_driver/;
my %ADDED;
sub import {
my $class = shift;
return if $class eq __PACKAGE__;
return if $ADDED{$class}++;
test2_ipc_add_driver($class);
}
sub use_shm { 0 }
for my $meth (qw/send cull add_hub drop_hub waiting is_viable/) {
no strict 'refs';
*$meth = sub {
my $thing = shift;
confess "'$thing' did not define the required method '$meth'."
};
}
# Print the error and call exit. We are not using 'die' cause this is a
# catastophic error that should never be caught. If we get here it
# means some serious shit has happened in a child process, the only way
# to inform the parent may be to exit false.
sub abort {
my $self = shift;
chomp(my ($msg) = @_);
print STDERR "IPC Fatal Error: $msg\n";
print STDOUT "not ok - IPC Fatal Error\n";
CORE::exit(255) unless $self->no_fatal;
}
sub abort_trace {
my $self = shift;
my ($msg) = @_;
$self->abort(longmess($msg));
}
1;
__END__
=pod
=encoding UTF-8
=head1 NAME
Test2::IPC::Driver - Base class for Test2 IPC drivers.
=head1 EXPERIMENTAL RELEASE
This is an experimental release. Using this right now is not recommended.
=head1 SYNOPSIS
package Test2::IPC::Driver::MyDriver;
use base 'Test2::IPC::Driver';
...
=head1 METHODS
=over 4
=item $self->abort($msg)
If an IPC encounters a fatal error it should use this. This will print the
message to STDERR with C<'IPC Fatal Error: '> prefixed to it, then it will
forcefully exit 255. IPC errors may occur in threads or processes other than
the main one, this method provides the best chance of the harness noticing the
error.
=item $self->abort_trace($msg)
This is the same as C<< $ipc->abort($msg) >> except that it uses
C<Carp::longmess> to add a stack trace to the message.
=item $false = $self->use_shm
The base class always returns false for this method. You may override it if you
wish to use the SHM made avilable in L<Test2::API>/L<Test2::API::Instance>.
=back
=head1 LOADING DRIVERS
Test2::IPC::Driver has an C<import()> method. All drivers inherit this import
method. This import method registers the driver.
In most cases you just need to load the desired IPC driver to make it work. You
should load this driver as early as possible. A warning will be issued if you
load it too late for it to be effective.
use Test2::IPC::Driver::MyDriver;
...
=head1 WRITING DRIVERS
package Test2::IPC::Driver::MyDriver;
use strict;
use warnings;
use base 'Test2::IPC::Driver';
sub is_viable {
return 0 if $^O eq 'win32'; # Will not work on windows.
return 1;
}
sub add_hub {
my $self = shift;
my ($hid) = @_;
... # Make it possible to contact the hub
}
sub drop_hub {
my $self = shift;
my ($hid) = @_;
... # Nothing should try to reach the hub anymore.
}
sub send {
my $self = shift;
my ($hid, $e) = @_;
... # Send the event to the proper hub.
# If you are using the SHM you should notify other procs/threads that
# there is a pending event.
Test2::API::test2_ipc_set_pending($uniq_val);
}
sub cull {
my $self = shift;
my ($hid) = @_;
my @events = ...; # Here is where you get the events for the hub
return @events;
}
sub waiting {
my $self = shift;
... # Notify all listening procs and threads that the main
... # process/thread is waiting for them to finish.
}
1;
=head2 METHODS SUBCLASSES MUST IMPLEMENT
=over 4
=item $ipc->is_viable
This should return true if the driver works in the current environment. This
should return false if it does not. This is a CLASS method.
=item $ipc->add_hub($hid)
This is used to alert the driver that a new hub is expecting events. The driver
should keep track of the process and thread ids, the hub should only be dropped
by the proc+thread that started it.
sub add_hub {
my $self = shift;
my ($hid) = @_;
... # Make it possible to contact the hub
}
=item $ipc->drop_hub($hid)
This is used to alert the driver that a hub is no longer accepting events. The
driver should keep track of the process and thread ids, the hub should only be
dropped by the proc+thread that started it (This is the drivers responsibility
to enforce).
sub drop_hub {
my $self = shift;
my ($hid) = @_;
... # Nothing should try to reach the hub anymore.
}
=item $ipc->send($hid, $event);
Used to send events from the current process/thread to the specified hub in its
process+thread.
sub send {
my $self = shift;
my ($hid, $e) = @_;
... # Send the event to the proper hub.
# If you are using the SHM you should notify other procs/threads that
# there is a pending event.
Test2::API::test2_ipc_set_pending($uniq_val);
}
=item @events = $ipc->cull($hid)
Used to collect events that have been sent to the specified hub.
sub cull {
my $self = shift;
my ($hid) = @_;
my @events = ...; # Here is where you get the events for the hub
return @events;
}
=item $ipc->waiting()
This is called in the parent process when it is complete and waiting for all
child processes and threads to complete.
sub waiting {
my $self = shift;
... # Notify all listening procs and threads that the main
... # process/thread is waiting for them to finish.
}
=back
=head2 METHODS SUBCLASSES MAY IMPLEMENT OR OVERRIDE
=over 4
=item $bool = $ipc->use_shm()
True if you want to make use of the L<Test2::API>/L<Test2::API::Instance> SHM.
=item $bites = $ipc->shm_size()
Use this to customize the size of the shm space. There are no guarantees about
what the size will be if you do not implement this.
=back
=head1 SOURCE
The source code repository for Test2 can be found at
F<http://github.com/Test-More/Test2/>.
=head1 MAINTAINERS
=over 4
=item Chad Granum E<lt>exodist@cpan.orgE<gt>
=back
=head1 AUTHORS
=over 4
=item Chad Granum E<lt>exodist@cpan.orgE<gt>
=back
=head1 COPYRIGHT
Copyright 2015 Chad Granum E<lt>exodist7@gmail.comE<gt>.
This program is free software; you can redistribute it and/or
modify it under the same terms as Perl itself.
See F<http://dev.perl.org/licenses/>
=cut
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