Software / code / prosody
Changeset
11071:f69a63b80f3a 0.11
util.gc: New module for configuring the Lua garbage collector
| author | Matthew Wild <mwild1@gmail.com> |
|---|---|
| date | Mon, 15 Jun 2020 14:16:10 +0100 |
| parents | 11067:f2ffc16a9669 |
| children | 11072:02227c5d0c59 |
| files | util/gc.lua |
| diffstat | 1 files changed, 50 insertions(+), 0 deletions(-) [+] |
line wrap: on
line diff
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/util/gc.lua Mon Jun 15 14:16:10 2020 +0100 @@ -0,0 +1,50 @@ +local array = require "util.array"; +local set = require "util.set"; + +local known_options = { + incremental = set.new { "mode", "threshold", "speed", "step_size" }; + generational = set.new { "mode", "minor_threshold", "major_threshold" }; +}; + +if _VERSION ~= "5.4" then + known_options.generational = nil; + known_options.incremental:remove("step_size"); +end + +local function configure(user, defaults) + local mode = user.mode or defaults.mode or "incremental"; + if not known_options[mode] then + return nil, "GC mode not supported on ".._VERSION..": "..mode; + end + + for k, v in pairs(user) do + if not known_options[mode]:contains(k) then + return nil, "Unknown GC parameter: "..k; + elseif k ~= "mode" and type(v) ~= "number" then + return nil, "parameter '"..k.."' should be a number"; + end + end + + if mode == "incremental" then + if _VERSION == "Lua 5.4" then + collectgarbage(mode, + user.threshold or defaults.threshold, + user.speed or defaults.speed, + user.step_size or defaults.step_size + ); + else + collectgarbage("setpause", user.threshold or defaults.threshold); + collectgarbage("setstepmul", user.speed or defaults.speed); + end + elseif mode == "generational" then + collectgarbage(mode, + user.minor_threshold or defaults.minor_threshold, + user.major_threshold or defaults.major_threshold + ); + end + return true; +end + +return { + configure = configure; +};
