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local guide = require 'parser.guide'
local util = require 'utility'
local files = require 'files'
local timer = require 'timer'
local setmetatable = setmetatable
local assert = assert
local require = require
local type = type
local running = coroutine.running
local ipairs = ipairs
local log = log
local xpcall = xpcall
local mathHuge = math.huge
local collectgarbage = collectgarbage
_ENV = nil
---@class vm
local m = {}
function m.lock(tp, source)
local co = running()
local master = m.locked[co]
if not master then
master = {}
m.locked[co] = master
end
if not master[tp] then
master[tp] = {}
end
if master[tp][source] then
return nil
end
master[tp][source] = true
return function ()
master[tp][source] = nil
end
end
function m.isSet(src)
local tp = src.type
if tp == 'setglobal'
or tp == 'local'
or tp == 'setlocal'
or tp == 'setfield'
or tp == 'setmethod'
or tp == 'setindex'
or tp == 'tablefield'
or tp == 'tableindex' then
return true
end
if tp == 'call' then
local special = m.getSpecial(src.node)
if special == 'rawset' then
return true
end
end
return false
end
function m.isGet(src)
local tp = src.type
if tp == 'getglobal'
or tp == 'getlocal'
or tp == 'getfield'
or tp == 'getmethod'
or tp == 'getindex' then
return true
end
if tp == 'call' then
local special = m.getSpecial(src.node)
if special == 'rawget' then
return true
end
end
return false
end
function m.getArgInfo(source)
local callargs = source.parent
if not callargs or callargs.type ~= 'callargs' then
return nil
end
local call = callargs.parent
if not call or call.type ~= 'call' then
return nil
end
for i = 1, #callargs do
if callargs[i] == source then
return call.node, i
end
end
return nil
end
function m.getSpecial(source)
if not source then
return nil
end
return source.special
end
function m.getKeyName(source)
if not source then
return nil
end
if source.type == 'library' then
return 's|' .. source.name
end
if source.type == 'call' then
local special = m.getSpecial(source.node)
if special == 'rawset'
or special == 'rawget' then
return guide.getKeyNameOfLiteral(source.args[2])
end
end
return guide.getKeyName(source)
end
function m.mergeResults(a, b)
for _, r in ipairs(b) do
if not a[r] then
a[r] = true
a[#a+1] = r
end
end
return a
end
m.cacheTracker = setmetatable({}, { __mode = 'kv' })
function m.flushCache()
if m.cache then
m.cache.dead = true
end
m.cacheVersion = files.globalVersion
m.cache = {}
m.cacheActiveTime = mathHuge
m.locked = setmetatable({}, { __mode = 'k' })
m.cacheTracker[m.cache] = true
end
function m.getCache(name)
if m.cacheVersion ~= files.globalVersion then
m.flushCache()
end
m.cacheActiveTime = timer.clock()
if not m.cache[name] then
m.cache[name] = {}
end
return m.cache[name]
end
local function init()
m.flushCache()
-- 可以在一段时间不活动后清空缓存，不过目前看起来没有必要
--timer.loop(1, function ()
-- if timer.clock() - m.cacheActiveTime > 10.0 then
-- log.info('Flush cache: Inactive')
-- m.flushCache()
-- collectgarbage()
-- end
--end)
end
xpcall(init, log.error)
return m
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