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@@ -1,14 +1,20 @@
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procedure main()
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create_thread(thread_a)
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create_thread(thread_b)
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end procedure
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procedure thread_a()
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statement a1
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statement a2
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end procedure
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procedure thread_b()
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statement b1
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statement b2
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end procedure
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procedure main()
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shared a1_ready := create_semaphore(0)
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shared b1_ready := create_semaphore(0)
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create_thread(thread_a)
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create_thread(thread_b)
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end procedure
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procedure thread_a()
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statement a1
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wait(b1_ready)
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signal(a1_ready)
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statement a2
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end procedure
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procedure thread_b()
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statement b1
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signal(b1_ready)
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wait(a1_ready)
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statement b2
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end procedure
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