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local guide = require 'parser.guide'
local vm = require 'vm.vm'
local function getGlobals(root)
local env = guide.getENV(root)
if not env then
return nil
end
local cache = {}
local fields = guide.requestFields(env)
for _, src in ipairs(fields) do
local name = vm.getKeyName(src)
if not name then
return
end
if not cache[name] then
cache[name] = {
key = name,
}
end
cache[name][#cache[name]+1] = src
vm.cache.getGlobal[src] = name
end
return cache
end
function vm.getGlobals(source)
source = guide.getRoot(source)
local cache = vm.cache.getGlobals[source]
if cache ~= nil then
return cache
end
local unlock = vm.lock('getGlobals', source)
if not unlock then
return nil
end
cache = getGlobals(source) or false
vm.cache.getGlobals[source] = cache
unlock()
return cache
end
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