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local timer = require 'timer'
local util = require 'utility'
---@class await
local m = {}
m.type = 'await'
m.coMap = setmetatable({}, { __mode = 'k' })
m.idMap = {}
m.delayQueue = {}
m.delayQueueIndex = 1
m.watchList = {}
m._enable = true
--- 设置错误处理器
---@param errHandle function {comment = '当有错误发生时，会以错误堆栈为参数调用该函数'}
function m.setErrorHandle(errHandle)
m.errorHandle = errHandle
end
function m.checkResult(co, ...)
local suc, err = ...
if not suc and m.errorHandle then
m.errorHandle(debug.traceback(co, err))
end
return ...
end
--- 创建一个任务
function m.call(callback, ...)
local co = coroutine.create(callback)
local closers = {}
m.coMap[co] = {
closers = closers,
priority = false,
}
for i = 1, select('#', ...) do
local id = select(i, ...)
if not id then
break
end
m.setID(id, co)
end
local currentCo = coroutine.running()
local current = m.coMap[currentCo]
if current then
for closer in pairs(current.closers) do
closers[closer] = true
closer(co)
end
end
return m.checkResult(co, coroutine.resume(co))
end
--- 创建一个任务，并挂起当前线程，当任务完成后再延续当前线程/若任务被关闭，则返回nil
function m.await(callback, ...)
if not coroutine.isyieldable() then
return callback(...)
end
return m.wait(function (resume, ...)
m.call(function ()
local returnNil <close> = util.defer(resume)
resume(callback())
end, ...)
end, ...)
end
--- 设置一个id，用于批量关闭任务
function m.setID(id, co)
co = co or coroutine.running()
if not m.idMap[id] then
m.idMap[id] = setmetatable({}, { __mode = 'k' })
end
m.idMap[id][co] = true
end
--- 根据id批量关闭任务
function m.close(id)
local map = m.idMap[id]
if not map then
return
end
local count = 0
for co in pairs(map) do
map[co] = nil
coroutine.close(co)
count = count + 1
end
log.debug('Close await:', id, count)
end
function m.hasID(id, co)
co = co or coroutine.running()
return m.idMap[id] and m.idMap[id][co] ~= nil
end
--- 休眠一段时间
---@param time number
function m.sleep(time)
if not coroutine.isyieldable() then
if m.errorHandle then
m.errorHandle(debug.traceback('Cannot yield'))
end
return
end
local co = coroutine.running()
timer.wait(time, function ()
if coroutine.status(co) ~= 'suspended' then
return
end
return m.checkResult(co, coroutine.resume(co))
end)
return coroutine.yield()
end
--- 等待直到唤醒
---@param callback function
function m.wait(callback, ...)
if not coroutine.isyieldable() then
return
end
local co = coroutine.running()
local resumed
callback(function (...)
if resumed then
return
end
resumed = true
if coroutine.status(co) ~= 'suspended' then
return
end
return m.checkResult(co, coroutine.resume(co, ...))
end, ...)
return coroutine.yield()
end
--- 延迟
function m.delay()
if not m._enable then
return
end
if not coroutine.isyieldable() then
return
end
local co = coroutine.running()
local current = m.coMap[co]
if m.onWatch('delay', co) == false then
return
end
-- TODO
if current.priority then
return
end
m.delayQueue[#m.delayQueue+1] = function ()
if coroutine.status(co) ~= 'suspended' then
return
end
return m.checkResult(co, coroutine.resume(co))
end
return coroutine.yield()
end
local function warnStepTime(passed, waker)
if passed < 1 then
log.warn(('Await step takes [%.3f] sec.'):format(passed))
return
end
for i = 1, 100 do
local name, v = debug.getupvalue(waker, i)
if not name then
return
end
if name == 'co' then
log.warn(debug.traceback(v, ('[fire]Await step takes [%.3f] sec.'):format(passed)))
return
end
end
end
--- 步进
function m.step()
local resume = m.delayQueue[m.delayQueueIndex]
if resume then
m.delayQueue[m.delayQueueIndex] = false
m.delayQueueIndex = m.delayQueueIndex + 1
local clock = os.clock()
resume()
local passed = os.clock() - clock
if passed > 0.1 then
warnStepTime(passed, resume)
end
return true
else
m.delayQueue = {}
m.delayQueueIndex = 1
return false
end
end
function m.setPriority(n)
m.coMap[coroutine.running()].priority = true
end
function m.enable()
m._enable = true
end
function m.disable()
m._enable = false
end
--- 注册事件
function m.watch(callback)
m.watchList[#m.watchList+1] = callback
end
function m.onWatch(ev, ...)
for _, callback in ipairs(m.watchList) do
local res = callback(ev, ...)
if res ~= nil then
return res
end
end
end
return m
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