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local M = {}
M.__index = M
local queue = {}
local function resume_task(task, e)
if coroutine.status(task.co) == "dead" then
return false
end
if task.filter then
for _, f in ipairs(task.filter) do
if f == e[1] then
goto resume
end
end
return true
end
::resume::
local ok, ret = coroutine.resume(task.co, e)
if not ok then
io.stderr:write(debug.traceback(task.co, ret)..'\n\n')
error "error in event loop"
end
task.filter = ret
return coroutine.status(task.co) ~= "dead"
end
local function create_task(fn)
local task = {}
task.co = coroutine.create(fn)
resume_task(task)
return task
end
function M.poll(...)
local filter = {...}
return unpack(coroutine.yield(#filter > 0 and filter))
end
function M.sleep(secs)
local t = 0
while t < secs do
local e, dt = M.poll "update"
t = t + dt
end
return t
end
function M.queue(...)
table.insert(queue, {...})
end
function M.await_any(...)
local tasks = {...}
for i, t in ipairs(tasks) do
tasks[i] = create_task(t)
end
while true do
local e = coroutine.yield()
for _, t in ipairs(tasks) do
if not resume_task(t, e) then return end
end
end
end
function M.mainloop(start)
local main = create_task(function()
start()
end)
return function()
love.event.pump()
local es = love.event.poll()
while true do
local e = {es()}
if not e[1] then break end
if e[1] == "quit" then
if not love.quit or not love.quit() then
return e[2] or 0
end
end
if love.handlers[e[1]] then
love.handlers[e[1]](unpack(e, 2))
end
table.insert(queue, e)
end
local q = queue
queue = {}
for i, e in ipairs(q) do
if not resume_task(main, e) then return 0 end
end
local dt = love.timer.step()
if not resume_task(main, {"update", dt}) then return 0 end
if love.graphics and love.graphics.isActive() then
love.graphics.clear(love.graphics.getBackgroundColor())
require "viewport".origin()
if not resume_task(main, {"draw", dt}) then return 0 end
love.graphics.present()
end
love.timer.sleep(0.001)
end
end
return M
|
