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();
106 Perl 5.6 introduced something called interpreter threads. Interpreter
107 threads are different from "5005threads" (the thread model of Perl
108 5.005) by creating a new perl interpreter per thread and not sharing
109 any data or state between threads.
111 Prior to perl 5.8 this has only been available to people embedding
112 perl and for emulating fork() on windows.
114 The threads API is loosely based on the old Thread.pm API. It is very
115 important to note that variables are not shared between threads, all
116 variables are per default thread local. To use shared variables one
117 must use threads::shared.
119 It is also important to note that you preferably enable threads by
120 doing C<use threads> as early as possible and that it is not possible
121 to enable threading inside an eval ""; In particular, if you are
122 intending to share variables with threads::shared, you must
123 C<use threads> before you C<use threads::shared> and threads will emit
124 a warning if you do it the other way around.
128 =item $thread = threads->create(function, LIST)
130 This will create a new thread with the entry point function and give
131 it LIST as parameters. It will return the corresponding threads
136 This will wait for the corresponding thread to join. When it finishes
137 join will return the return values of the entry point function. If a
138 thread has been detached, join will return without wait.
140 =item $thread->detach
142 Will throw away the return value from the thread and make it
147 This will return the object for the current thread.
151 This will return the id of the thread. threads->self->tid() is a
152 quick way to get current thread id.
154 =item threads->yield();
156 This will tell the OS to let this thread yield CPU time to other threads.
157 However this is highly depending on the underlying thread implmentation.
165 =item Cleanup skipped %d active threads
167 The main thread exited while there were still other threads running.
168 This is not a good sign: you should either explicitly join the threads,
169 or somehow be certain that all the non-main threads have finished.
177 =item Fix so the return value is returned when you join.
181 =item Fix memory leaks!
185 =head1 AUTHOR and COPYRIGHT
187 Arthur Bergman E<lt>arthur at contiller.seE<gt>
189 threads is released under the same license as Perl.
193 Richard Soderberg E<lt>rs at crystalflame.netE<gt>
194 Helping me out tons, trying to find reasons for races and other weird bugs!
196 Simon Cozens E<lt>simon at brecon.co.ukE<gt>
197 Being there to answer zillions of annoying questions
199 Rocco Caputo E<lt>troc at netrus.netE<gt>
201 Vipul Ved Prakash E<lt>mail at vipul.netE<gt>
202 Helping with debugging.
204 please join perl-ithreads@perl.org for more information
210 =item creating a thread from within a thread is unsafe under win32
212 =item PERL_OLD_SIGNALS are not threadsafe, will not be.
219 L<perl>, L<threads::shared>, L<perlcall>, L<perlembed>, L<perlguts>