110 lines
2.6 KiB
Lua
110 lines
2.6 KiB
Lua
do -- so local works
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-- task format:
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-- {
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-- ["n"] = "name",
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-- ["c"] = coroutine of task,
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-- ["e"] = { table, of, environment, variables },
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-- ["p"] = parent pid,
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-- ["u"] = user ID,
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-- ["ep"]= event queue pointer
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-- }
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local tT,nP,rg,eq,p = {},1,_G,{},1 -- taskTable,nextPid,real _G,event queue
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_G.cT,sbt,C,T,io = 0,{},coroutine,table,io -- currentTask,sandboxTable
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function _G.spawn(n,f,e)
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tT[nP] = {}
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local function nf()
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log(xpcall(f))
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end
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tT[nP].c = coroutine.create(nf)
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tT[nP].n = n
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tT[nP].p = cT or -1
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if tT[cT] then
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tT[nP].u,tT[nP].ep,tT[nP].e = tT[cT].u,tT[cT].ep,e or tT[cT].e or {["PWD"]="/boot",["PATH"]="/boot/exec:."}
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else
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tT[nP].u,tT[nP].ep,tT[nP].e = "superuser",1,{["PWD"]="/boot",["PATH"]="/boot/exec:."}
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end
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nP = nP + 1
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return nP-1
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end
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function _G.sched()
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_G.sched = nil
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while #tT > 0 do
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eq[#eq+1]={computer.pullSignal(p)} -- add the latest event to the eq
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if #eq > 16 then
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table.remove(eq,1) -- remove the earliest if the eq is full
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for pid,proc in pairs(tT) do
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if proc.ep > 1 then
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proc.ep = proc.ep - 1 -- decrement pointers for tasks to keep them on the same ones
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end
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end
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end
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for pid,proc in pairs(tT) do
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if coroutine.status(proc.c) == "dead" then
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tT[pid] = nil
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else
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cT=pid
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for i = 1,tT[pid].ep, #eq do
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_G.ev = eq[#eq] -- make an ev for MultICE compat
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coroutine.resume(proc.c)
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end
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end
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end
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end
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end
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_G.event = {}
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function event.get() -- get the next event in the queue, or nil
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if eq[tT[cT].ep] then
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tT[cT].ep = tT[cT].ep + 1
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if tT[cT].ep > 17 then
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tT[cT].ep = 17
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end
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return eq[tT[cT].ep - 1]
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end
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end
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function event.pull(t,time) -- return or wait for the next event, optionally with the first param matching t
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time = time or math.huge
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time = time + computer.uptime()
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while computer.uptime() < time do
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local e = event.get()
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if e then
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if t then
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if e[1] == t then
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return table.unpack(e)
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end
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else
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return table.unpack(e)
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end
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end
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coroutine.yield()
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end
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end
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event.push = computer.pushSignal
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function os.getenv(k) -- gets an envionment variable from tT[cT].e
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if tT[cT] then
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return tT[cT].e[k]
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end
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end
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function os.setenv(k,v) -- sets "
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if tT[cT] then
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tT[cT].e[k] = v
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end
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end
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function os.tasks() -- returns a table of tasks running on the system
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local t = {}
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for k,v in pairs(tT) do
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t[k] = v.n
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end
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return t
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end
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function os.taskinfo(pid) -- returns info on a task
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if tT[pid] then
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return tT[pid].n,tT[pid].p,tT[pid].u
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end
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end
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function os.genenv()
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local et = {}
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setmetatable(et,{__index=_G})
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return et
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end
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end
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