9 unless ($Config{useithreads}) {
10 my @caller = caller(2);
12 $caller[1] line $caller[2]:
14 This Perl hasn't been configured and built properly for the threads
15 module to work. (The 'useithreads' configuration option hasn't been used.)
17 Having threads support requires all of Perl and all of the modules in
18 the Perl installation to be rebuilt, it is not just a question of adding
19 the threads module. (In other words, threaded and non-threaded Perls
20 are binary incompatible.)
22 If you want to the use the threads module, please contact the people
25 Cannot continue, aborting.
37 warn "Warning, threads::shared has already been loaded. ".
38 "To enable shared variables for these modules 'use threads' ".
39 "must be called before any of those modules are loaded\n"
40 if($threads::shared::threads_shared);
46 our @ISA = qw(Exporter DynaLoader);
48 our %EXPORT_TAGS = ( all => [qw()]);
50 our @EXPORT_OK = ( @{ $EXPORT_TAGS{'all'} } );
55 our $VERSION = '0.05';
59 return 1 if($_[0]->tid() == $_[1]->tid());
63 $threads::threads = 1;
65 bootstrap threads $VERSION;
67 # why document 'new' then use 'create' in the tests!
70 # Preloaded methods go here.
77 threads - Perl extension allowing use of interpreter based threads from perl
84 print "Thread started\n";
87 my $thread = threads->create("start_thread","argument");
89 $thread->create(sub { print "I am a thread"},"argument");
95 $thread = threads->self();
104 Perl 5.6 introduced something called interpreter threads. Interpreter
105 threads are different from "5005threads" (the thread model of Perl
106 5.005) by creating a new perl interpreter per thread and not sharing
107 any data or state between threads.
109 Prior to perl 5.8 this has only been available to people embedding
110 perl and for emulating fork() on windows.
112 The threads API is loosely based on the old Thread.pm API. It is very
113 important to note that variables are not shared between threads, all
114 variables are per default thread local. To use shared variables one
115 must use threads::shared.
117 It is also important to note that you preferably enable threads by
118 doing C<use threads> as early as possible and that it is not possible
119 to enable threading inside an eval ""; In particular, if you are
120 intending to share variables with threads::shared, you must
121 C<use threads> before you C<use threads::shared> and threads will emit
122 a warning if you do it the other way around.
126 =item $thread = threads->create(function, LIST)
128 This will create a new thread with the entry point function and give
129 it LIST as parameters. It will return the corresponding threads
134 This will wait for the corresponding thread to join. When it finishes
135 join will return the return values of the entry point function. If a
136 thread has been detached, join will return without wait.
138 =item $thread->detach
140 Will throw away the return value from the thread and make it
145 This will return the object for the current thread.
149 This will return the id of the thread. threads->self->tid() is a
150 quick way to get current thread id.
158 =item Cleanup skipped %d active threads
160 The main thread exited while there were still other threads running.
161 This is not a good sign: you should either explicitly join the threads,
162 or somehow be certain that all the non-main threads have finished.
170 =item Fix so the return value is returned when you join.
174 =item Fix memory leaks!
178 =head1 AUTHOR and COPYRIGHT
180 Arthur Bergman E<lt>arthur at contiller.seE<gt>
182 threads is released under the same license as Perl.
186 Richard Soderberg E<lt>rs at crystalflame.netE<gt>
187 Helping me out tons, trying to find reasons for races and other weird bugs!
189 Simon Cozens E<lt>simon at brecon.co.ukE<gt>
190 Being there to answer zillions of annoying questions
192 Rocco Caputo E<lt>troc at netrus.netE<gt>
194 Vipul Ved Prakash E<lt>mail at vipul.netE<gt>
195 Helping with debugging.
197 please join perl-ithreads@perl.org for more information
203 =item creating a thread from within a thread is unsafe under win32
205 =item PERL_OLD_SIGNALS are not threadsafe, will not be.
212 L<perl>, L<threads::shared>, L<perlcall>, L<perlembed>, L<perlguts>