| 1 | # spec/ysh-stdlib
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| 2 |
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| 3 | ## our_shell: ysh
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| 4 |
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| 5 | #### semaphore
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| 6 | source --builtin draft-synch.ysh
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| 7 |
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| 8 | sema-new (1, &s)
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| 9 | fork {
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| 10 | sleep 0.5
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| 11 | sema-down (s)
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| 12 | echo 1
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| 13 | }
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| 14 | fork {
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| 15 | sleep 1
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| 16 | sema-down (s)
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| 17 | echo 2
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| 18 | }
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| 19 | fork {
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| 20 | sleep 1.5
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| 21 | sema-down (s)
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| 22 | echo 3
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| 23 | }
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| 24 | sleep 2
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| 25 | echo 4
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| 26 | sema-up (s)
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| 27 | sleep 0.5
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| 28 | echo 5
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| 29 | sema-up (s)
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| 30 | sema-destroy (s)
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| 31 | ## STDOUT:
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| 32 | 1
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| 33 | 4
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| 34 | 2
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| 35 | 5
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| 36 | 3
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| 37 | ## END
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| 38 |
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| 39 | #### semaphore init and multiple down
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| 40 | source --builtin draft-synch.ysh
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| 41 |
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| 42 | sema-new (3, &s)
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| 43 | fork {
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| 44 | sleep 1
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| 45 | sema-up (s)
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| 46 | }
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| 47 | sema-down (s)
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| 48 | sema-down (s)
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| 49 | sema-down (s)
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| 50 | sema-down (s)
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| 51 | echo yes
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| 52 | ## STDOUT:
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| 53 | yes
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| 54 | ## END
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| 55 |
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| 56 | # TODO: add test case for mutex and other sync primitives
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