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Test2::Util(3)        User Contributed Perl Documentation       Test2::Util(3)
NAME
       Test2::Util - Tools used by Test2 and friends.
DESCRIPTION
       Collection of tools used by Test2 and friends.
EXPORTS
       All exports are optional. You must specify subs to import.
       ($success, $error) = try { ... }
           Eval the codeblock, return success or failure, and the error
           message. This code protects $@ and $!, they will be restored by the
           end of the run. This code also temporarily blocks $SIG{DIE}
           handlers.
       protect { ... }
           Similar to try, except that it does not catch exceptions. The idea
           here is to protect $@ and $! from changes. $@ and $! will be
           restored to whatever they were before the run so long as it is
           successful. If the run fails $! will still be restored, but $@ will
           contain the exception being thrown.
       CAN_FORK
           True if this system is capable of true or pseudo-fork.
       CAN_REALLY_FORK
           True if the system can really fork. This will be false for systems
           where fork is emulated.
       CAN_THREAD
           True if this system is capable of using threads.
       USE_THREADS
           Returns true if threads are enabled, false if they are not.
       get_tid
           This will return the id of the current thread when threads are
           enabled, otherwise it returns 0.
       my $file = pkg_to_file($package)
           Convert a package name to a filename.
       $string = ipc_separator()
           Get the IPC separator. Currently this is always the string '~'.
       $string = gen_uid()
           Generate a unique id (NOT A UUID). This will typically be the
           process id, the thread id, the time, and an incrementing integer
           all joined with the "ipc_separator()".
           These ID's are unique enough for most purposes. For identical ids
           to be generated you must have 2 processes with the same PID
           generate IDs at the same time with the same current state of the
           incrementing integer. This is a perfectly reasonable thing to
           expect to happen across multiple machines, but is quite unlikely to
           happen on one machine.
           This can fail to be unique if a process generates an id, calls
           exec, and does it again after the exec and it all happens in less
           than a second. It can also happen if the systems process id's cycle
           in less than a second allowing 2 different programs that use this
           generator to run with the same PID in less than a second. Both
           these cases are sufficiently unlikely. If you need universally
           unique ids, or ids that are unique in these conditions, look at
           Data::UUID.
       ($ok, $err) = do_rename($old_name, $new_name)
           Rename a file, this wraps "rename()" in a way that makes it more
           reliable cross-platform when trying to rename files you recently
           altered.
       ($ok, $err) = do_unlink($filename)
           Unlink a file, this wraps "unlink()" in a way that makes it more
           reliable cross-platform when trying to unlink files you recently
           altered.
       ($ok, $err) = try_sig_mask { ... }
           Complete an action with several signals masked, they will be
           unmasked at the end allowing any signals that were intercepted to
           get handled.
           This is primarily used when you need to make several actions atomic
           (against some signals anyway).
           Signals that are intercepted:
           SIGINT
           SIGALRM
           SIGHUP
           SIGTERM
           SIGUSR1
           SIGUSR2
NOTES && CAVEATS
       5.10.0
           Perl 5.10.0 has a bug when compiled with newer gcc versions. This
           bug causes a segfault whenever a new thread is launched. Test2 will
           attempt to detect this, and note that the system is not capable of
           forking when it is detected.
       Devel::Cover
           Devel::Cover does not support threads. CAN_THREAD will return false
           if Devel::Cover is loaded before the check is first run.
SOURCE
       The source code repository for Test2 can be found at
       http://github.com/Test-More/test-more/.
MAINTAINERS
       Chad Granum <exodist AT cpan.org>
AUTHORS
       Chad Granum <exodist AT cpan.org>
       Kent Fredric <kentnl AT cpan.org>
COPYRIGHT
       Copyright 2019 Chad Granum <exodist AT cpan.org>.
       This program is free software; you can redistribute it and/or modify it
       under the same terms as Perl itself.
       See http://dev.perl.org/licenses/
perl v5.16.3                      2019-09-06                    Test2::Util(3)