63 lines
1.7 KiB
Plaintext
63 lines
1.7 KiB
Plaintext
--:Minify:--
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local kernel = ...
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local signal = {}
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kernel.signal=signal
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function signal.sigsend(pid, sig)
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if sig<0 or sig>256 then error("EINVAL") end
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local task = kernel.tasks[tostring(pid)]
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if not task then error("ENOENT") end
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if not task.sigq then return end
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task.sigq[#task.sigq+1] = sig
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end
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function signal.sigcatch(handler)
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local task=kernel.currentTask
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task.sigh=handler
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if not task.sigq then task.sigq={} end
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local handle={
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error="",
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active=true
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}
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if task.sigd then task.sigd.active=false; end
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task.sigd=handle
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return handle
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end
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function signal.sigignore()
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local task=kernel.currentTask
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task.sigh=nil
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task.sigq=nil
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if task.sigd then task.sigd.active=false end
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task.sigd=nil
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end
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kernel.execPerTask(function(task)
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if task.status=="R" then
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if task.sigq and #task.sigq ~= 0 and task.sigh then
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local coro = coroutine.create(task.sigh)
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local status,err=coroutine.resume(coro, table.remove(task.sigq, 1))
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EFI:yeild()
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if status=="error" or status==false then
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task.sigd.error=err or "Unknown"
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task.sigd.active=false
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task.sigh=nil
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task.sigq=nil
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task.sigd=nil
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elseif status=="success" or status==true then
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if err=="syscall" then
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task.sigd.error="Cannot execute syscalls from signals"
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task.sigd.active=false
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task.sigh=nil
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task.sigq=nil
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task.sigd=nil
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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,2)
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local s=kernel.syscalls
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s["sigsend"] = signal.sigsend
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s["sigcatch"] = signal.sigcatch
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s["sigignore"] = signal.sigignore |