NAME

Check::Fork - Check fork functionality.

SYNOPSIS

 use Check::Fork qw(check_fork $ERROR_MESSAGE);

 my $ret = check_fork($config_hr, $os);
 print $ERROR_MESSAGE."\n";

DESCRIPTION

There is need of check for fork functionality in tests. Actually we have many duplicated and not same check code in distributions. Sic!

Intent of this module is create common code for check and test all behaviours. Extra thing is error message which describe issue.

SUBROUTINES

check_fork

 my $ret = check_fork($config_hr, $os);

Check possibility of forking functionality on system.

Variable $config_hr is primarily for testing and default is \%Config::Config.

Variable $os is primarily for testing and default is $^O.

Return value is 1 as possible fork() or 0 as not possible fork(). If return value is 0, set $ERROR_MESSAGE variable.

Returns 0/1.

ERRORS

 check_fork():
         Set $ERROR_MESSAGE variable if $ret is 0:
                 No fork() routine available.
                 $^O: No interpreter-based threading implementation.
                 $^O: No PERL_IMPLICIT_SYS ccflags set.

EXAMPLE1

 use strict;
 use warnings;

 use Check::Fork qw(check_fork $ERROR_MESSAGE);

 if (check_fork()) {
         print "We could fork.\n";
 } else {
         print "We couldn't fork.\n";
         print "Error message: $ERROR_MESSAGE\n";
 }

 # Output on Unix with Config{'d_fork'} set:
 # We could fork.

 # Output on Unix without Config{'d_fork'} set:
 # We couldn't fork.
 # Error message: No fork() routine available.

 # Output on Windows without $Config{'useithreads'} set:
 # We couldn't fork.
 # Error message: MSWin32: No interpreter-based threading implementation.

EXAMPLE2

 use strict;
 use warnings;

 use Check::Fork qw(check_fork);
 use Check::Socket qw(check_socket);

 if (! check_fork()) {
         print "We couldn't fork.\n";
         print "Error message: $Check::Fork::ERROR_MESSAGE\n";
 } elsif (! check_socket()) {
         print "We couldn't use socket communication.\n";
         print "Error message: $Check::Socket::ERROR_MESSAGE\n";
 } else {
         print "We could use fork and socket communication.\n";
 }

 # Output on Unix:
 # We could use fork and socket communication.

EXAMPLE3

 use strict;
 use warnings;

 use Check::Fork qw(check_fork);
 use Check::Socket qw(check_socket);
 use Test::More 'tests' => 1;

 SKIP: {
         skip $Check::Fork::ERROR_MESSAGE, 1 unless check_fork();
         skip $Check::Socket::ERROR_MESSAGE, 1 unless check_socket();

         ok(1, 'Fork and Socket test');
 };

 # Output on Unix:
 # 1..1
 # ok 1 - Fork and Socket test

DEPENDENCIES

Config, Exporter, Readonly.

SEE ALSO

Check::Socket

Check socket functionality.

Test2::Require::Fork

Skip a test file unless the system supports forking

Test2::Require::RealFork

Skip a test file unless the system supports true forking

REPOSITORY

https://github.com/michal-josef-spacek/Check-Fork

AUTHOR

Michal Josef Špaček mailto:skim@cpan.org

http://skim.cz

LICENSE AND COPYRIGHT

© 2021-2024 Michal Josef Špaček

BSD 2-Clause License

VERSION

0.05

cpanm Check::Fork

perl -MCPAN -e shell
install Check::Fork