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taghelper module refactoring fixes
[etc/awesome.git] / .config / awesome / modules / luatz / luatz / gettime.lua
1 local _M = {}
2
3 _M.source, _M.resolution, _M.gettime = (function()
4         local has_syscall, syscall = pcall(require, "syscall")
5         if has_syscall and syscall.clock_gettime and syscall.c.CLOCK then
6                 local clock_id = syscall.c.CLOCK.REALTIME
7                 local function timespec_to_number(timespec)
8                         return tonumber(timespec.tv_sec) + tonumber(timespec.tv_nsec) * 1e-9
9                 end
10                 return "syscall.clock_gettime(CLOCK_REALTIME)",
11                         syscall.clock_getres and timespec_to_number(syscall.clock_getres(clock_id)) or 1e-9,
12                         function()
13                                 return timespec_to_number(syscall.clock_gettime(clock_id))
14                         end
15         end
16
17         local has_unix, unix = pcall(require, "unix")
18         -- On Apple devices lunix only uses gettimeofday()
19         if has_unix and unix.clock_gettime and unix.uname and unix.uname().sysname ~= "Darwin" then
20                 return "unix.clock_gettime(CLOCK_REALTIME)", 1e-9, function()
21                         return unix.clock_gettime()
22                 end
23         end
24
25         if has_syscall and syscall.gettimeofday then
26                 local function timeval_to_number(timeval)
27                         return tonumber(timeval.tv_sec) + tonumber(timeval.tv_nsec) * 1e-6
28                 end
29                 return "syscall.gettimeofday()", 1e-6,
30                         function()
31                                 return timeval_to_number(syscall.gettimeofday())
32                         end
33         end
34
35         if has_unix and unix.gettimeofday then
36                 return "unix.gettimeofday()", 1e-6, unix.gettimeofday
37         end
38
39         local has_socket, socket = pcall(require, "socket")
40         if has_socket and socket.gettime then
41                 -- on windows, this uses GetSystemTimeAsFileTime, which has resolution of 1e-7
42                 -- on linux, this uses gettimeofday, which has resolution of 1e-6
43                 return "socket.gettime()", 1e-6, socket.gettime
44         end
45
46         if ngx and ngx.now then -- luacheck: ignore 113
47                 return "ngx.now()", 1e-3, ngx.now -- luacheck: ignore 113
48         end
49
50         return "os.time()", 1, os.time
51 end)()
52
53 return _M