【Lua实战】内存池：combat 模块的战斗对象复用

local freeList, active = {}, {}
for i = 1, 512 do
    freeList[i] = { dmg = 0, ts = 0, name = "" }
end
local function acquire()
    local n = #freeList
    if n == 0 then return nil end
    local obj = freeList[n]
    freeList[n] = nil
    return obj
end
local function release(obj)
    obj.dmg = 0
    obj.ts = 0
    obj.name = ""
    freeList[#freeList + 1] = obj
end

local function onHit(actor, dmg)
    local rec = acquire()
    if rec == nil then return end
    rec.dmg = dmg
    rec.ts = os.time()
    rec.name = class(actor):GetName()
    table.insert(active, rec)
end
setontimerex(197, 30)
function ontimer197()
    for i = #active, 1, -1 do
        if os.time() - active[i].ts > 60 then
            release(active[i])
            table.remove(active, i)
        end
    end
end