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|
----------------------------------------------------------------------------
-- LuaJIT profiler zones.
--
-- Copyright (C) 2005-2017 Mike Pall. All rights reserved.
-- Released under the MIT license. See Copyright Notice in luajit.h
----------------------------------------------------------------------------
--
-- This module implements a simple hierarchical zone model.
--
-- Example usage:
--
-- local zone = require("jit.zone")
-- zone("AI")
-- ...
-- zone("A*")
-- ...
-- print(zone:get()) --> "A*"
-- ...
-- zone()
-- ...
-- print(zone:get()) --> "AI"
-- ...
-- zone()
--
----------------------------------------------------------------------------
local remove = table.remove
return setmetatable({
flush = function(t)
for i=#t,1,-1 do t[i] = nil end
end,
get = function(t)
return t[#t]
end
}, {
__call = function(t, zone)
if zone then
t[#t+1] = zone
else
return (assert(remove(t), "empty zone stack"))
end
end
})
|
