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local threads = require 'threads'
local nthread = 4
local njob = 100
local pool = threads.Threads(
nthread,
function(threadid)
print('starting a new thread/state number ' .. threadid)
end
)
local jobid = 0
local result -- DO NOT put this in get
local function get()
-- fill up the queue as much as we can
-- this will not block
while jobid < njob and pool:acceptsjob() do
jobid = jobid + 1
pool:addjob(
function(jobid)
print(string.format('thread ID %d is performing job %d', __threadid, jobid))
return string.format("job output from job %d", jobid)
end,
function(jobres)
result = jobres
end,
jobid
)
end
-- is there still something to do?
if pool:hasjob() then
pool:dojob() -- yes? do it!
if pool:haserror() then -- check for errors
pool:synchronize() -- finish everything and throw error
end
return result
end
end
local jobdone = 0
repeat
-- get something asynchronously
local res = get()
-- do something with res (if any)
if res then
print(res)
jobdone = jobdone + 1
end
until not res -- until there is nothing remaining
assert(jobid == 100)
assert(jobdone == 100)
print('PASSED')
pool:terminate()
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