ce674d2d43
This is very important when several Lua tactics are implemented in the same Lua State object. In this case, even if we use the par combinator, a Lua tactic will block the other Lua tactics running in the same Lua State object. With this commit, a Lua tactic can use yield to allow other tactics in the same State object to execute. Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
32 lines
839 B
Lua
32 lines
839 B
Lua
local env = environment()
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local ios = io_state()
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local Bool = Const("Bool")
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env:add_var("p", Bool)
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env:add_var("q", Bool)
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local p, q = Consts("p, q")
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local ctx = context()
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S = State()
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-- tactics t1 and t2 uses yield to implement cooperative
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-- multitasking
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local counter1 = 0
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local t1 = tactic(function(env, ios, s)
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while true do
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counter1 = counter1 + 1
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coroutine.yield()
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end
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end)
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local counter2 = 0
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local t2 = tactic(function(env, ios, s)
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while true do
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counter2 = counter2 + 1
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coroutine.yield()
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end
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end)
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local T = (t1:par(t2)):try_for(150)
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T:solve(env, ios, ctx, p)
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print(counter1, counter2)
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assert(counter1 > 2)
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assert(counter2 > 2)
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