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--!A cross-platform build utility based on Lua
--
-- Licensed under the Apache License, Version 2.0 (the "License");
-- you may not use this file except in compliance with the License.
-- You may obtain a copy of the License at
--
-- http://www.apache.org/licenses/LICENSE-2.0
--
-- Unless required by applicable law or agreed to in writing, software
-- distributed under the License is distributed on an "AS IS" BASIS,
-- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-- See the License for the specific language governing permissions and
-- limitations under the License.
--
-- Copyright (C) 2015-present, Xmake Open Source Community.
--
-- @author ruki
-- @file memory.lua
--
-- define module
local memory = memory or {}
-- load modules
local os = require("base/os")
-- get memory info
--
-- @param name the specific info name (optional), e.g. "totalsize", "availsize", "usagerate"
-- @return the memory info table or specific value (sizes in bytes, usagerate in 0.0 ~ 1.0)
--
function memory.info(name)
local meminfo = memory._MEMINFO
local memtime = memory._MEMTIME
if meminfo == nil or memtime == nil or os.time() - memtime > 10 then -- cache 10s
meminfo = os._meminfo()
if meminfo.totalsize and meminfo.availsize then
meminfo.usagerate = (meminfo.totalsize - meminfo.availsize) / meminfo.totalsize
else
meminfo.usagerate = 0
end
memory._MEMINFO = meminfo
memory._MEMTIME = os.time()
end
if name then
return meminfo[name]
else
return meminfo
end
end
-- return module
return memory
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