--:Minify:--
local kernel = ...
local signal = {}
kernel.signal=signal

function signal.sigsend(pid, sig)
    if sig<0 or sig>256 then error("EINVAL") end
    local task = kernel.tasks[tostring(pid)]
    if not task then error("ENOENT") end
    if not task.sigq then return end
    task.sigq[#task.sigq+1] = sig
end

function signal.sigcatch(handler)
    local task=kernel.currentTask
    task.sigh=handler
    if not task.sigq then task.sigq={} end
    local handle={
        error="",
        active=true
    }
    if task.sigd then task.sigd.active=false; end
    task.sigd=handle
    return handle
end

function signal.sigignore()
    local task=kernel.currentTask
    task.sigh=nil
    task.sigq=nil
    if task.sigd then task.sigd.active=false end
    task.sigd=nil
end

local s=kernel.syscalls
s["sigsend"] = signal.sigsend
s["sigcatch"] = signal.sigcatch
s["sigignore"] = signal.sigignore