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… | |
| 50 | =item $sem->down($id) |
50 | =item $sem->down($id) |
| 51 | |
51 | |
| 52 | Decrement the counter, therefore "locking" the named semaphore. This |
52 | Decrement the counter, therefore "locking" the named semaphore. This |
| 53 | method waits until the semaphore is available if the counter is zero. |
53 | method waits until the semaphore is available if the counter is zero. |
| 54 | |
54 | |
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55 | =item $status = $sem->timed_down($id, $timeout) |
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56 | |
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57 | Like C<down>, but returns false if semaphore couldn't be acquired within |
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58 | $timeout seconds, otherwise true. |
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59 | |
| 55 | =cut |
60 | =cut |
| 56 | |
61 | |
| 57 | sub down { |
62 | sub down { |
| 58 | my $sem = ($_[0][1]{$_[1]} ||= [$_[0][0]]); |
63 | my $sem = ($_[0][1]{$_[1]} ||= [$_[0][0]]); |
| 59 | while ($sem->[0] <= 0) { |
64 | while ($sem->[0] <= 0) { |
| 60 | push @{$sem->[1]}, $Coro::current; |
65 | push @{$sem->[1]}, $Coro::current; |
| 61 | Coro::schedule; |
66 | Coro::schedule; |
| 62 | } |
67 | } |
| 63 | --$sem->[0]; |
68 | --$sem->[0]; |
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69 | } |
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70 | |
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71 | sub timed_down { |
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72 | require Coro::Timer; |
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73 | my $timeout = Coro::Timer::timeout($_[2]); |
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74 | |
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75 | my $sem = ($_[0][1]{$_[1]} ||= [$_[0][0]]); |
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76 | while ($sem->[0] <= 0) { |
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77 | push @{$sem->[1]}, $Coro::current; |
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78 | Coro::schedule; |
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79 | $timeout and return; |
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80 | } |
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81 | --$sem->[0]; |
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82 | return 1; |
| 64 | } |
83 | } |
| 65 | |
84 | |
| 66 | =item $sem->up($id) |
85 | =item $sem->up($id) |
| 67 | |
86 | |
| 68 | Unlock the semaphore again. |
87 | Unlock the semaphore again. |
