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adds Luaposix's time submodule as a source for nanosecond precision time #16

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adds Luaposix's time submodule as a source for nanosecond precision time #16

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13 changes: 13 additions & 0 deletions luatz/gettime.lua
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Original file line number Diff line number Diff line change
Expand Up @@ -14,6 +14,19 @@ _M.source, _M.resolution, _M.gettime = (function()
end
end

local has_posix_time, posix_time = pcall(require, "posix.time")
if has_posix_time and posix_time.clock_gettime then
local clock_id = posix_time.CLOCK_REALTIME
local function timespec_to_number(timespec)
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@lePereT lePereT Mar 2, 2022

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I didn't pull out this function as I didn't want useless code in scope for the methods below

return tonumber(timespec.tv_sec) + tonumber(timespec.tv_nsec) * 1e-9
end
return "posix.time.clock_gettime(CLOCK_REALTIME)",
posix_time.clock_getres and timespec_to_number(posix_time.clock_getres(clock_id)) or 1e-9,
function()
return timespec_to_number(posix_time.clock_gettime(clock_id))
end
end

local has_unix, unix = pcall(require, "unix")
-- On Apple devices lunix only uses gettimeofday()
if has_unix and unix.clock_gettime and unix.uname and unix.uname().sysname ~= "Darwin" then
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