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| 18 | |
18 | |
| 19 | cede; |
19 | cede; |
| 20 | |
20 | |
| 21 | =head1 DESCRIPTION |
21 | =head1 DESCRIPTION |
| 22 | |
22 | |
| 23 | This module collection manages coroutines. Coroutines are similar to |
23 | This module collection manages coroutines. Coroutines are similar |
| 24 | threads but don't run in parallel. |
24 | to threads but don't run in parallel at the same time even on SMP |
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25 | machines. The specific flavor of coroutine use din this module also |
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26 | guarentees you that it will not switch between coroutines unless |
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27 | necessary, at easily-identified points in your program, so locking and |
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28 | parallel access are rarely an issue, making coroutine programming much |
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29 | safer than threads programming. |
| 25 | |
30 | |
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31 | (Perl, however, does not natively support real threads but instead does a |
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32 | very slow and memory-intensive emulation of processes using threads. This |
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33 | is a performance win on Windows machines, and a loss everywhere else). |
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34 | |
| 26 | In this module, coroutines are defined as "callchain + lexical variables |
35 | In this module, coroutines are defined as "callchain + lexical variables + |
| 27 | + @_ + $_ + $@ + $^W + C stack), that is, a coroutine has it's own |
36 | @_ + $_ + $@ + $/ + C stack), that is, a coroutine has its own callchain, |
| 28 | callchain, it's own set of lexicals and it's own set of perl's most |
37 | its own set of lexicals and its own set of perls most important global |
| 29 | important global variables. |
38 | variables. |
| 30 | |
39 | |
| 31 | =cut |
40 | =cut |
| 32 | |
41 | |
| 33 | package Coro; |
42 | package Coro; |
| 34 | |
43 | |
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| 41 | |
50 | |
| 42 | our $idle; # idle handler |
51 | our $idle; # idle handler |
| 43 | our $main; # main coroutine |
52 | our $main; # main coroutine |
| 44 | our $current; # current coroutine |
53 | our $current; # current coroutine |
| 45 | |
54 | |
| 46 | our $VERSION = '3.01'; |
55 | our $VERSION = '3.1'; |
| 47 | |
56 | |
| 48 | our @EXPORT = qw(async cede schedule terminate current unblock_sub); |
57 | our @EXPORT = qw(async cede schedule terminate current unblock_sub); |
| 49 | our %EXPORT_TAGS = ( |
58 | our %EXPORT_TAGS = ( |
| 50 | prio => [qw(PRIO_MAX PRIO_HIGH PRIO_NORMAL PRIO_LOW PRIO_IDLE PRIO_MIN)], |
59 | prio => [qw(PRIO_MAX PRIO_HIGH PRIO_NORMAL PRIO_LOW PRIO_IDLE PRIO_MIN)], |
| 51 | ); |
60 | ); |
