1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
|
{-# LANGUAGE CApiFFI #-}
{-# LANGUAGE ForeignFunctionInterface #-}
module Data.UnixTime.Sys (getUnixTime) where
import Data.UnixTime.Types
import Foreign.C.Error
import Foreign.C.Types
import Foreign.Marshal.Alloc
import Foreign.Ptr
import Foreign.Storable
-- from System.Time
#include <time.h>
#include <sys/time.h>
type CTimeVal = ()
type CTimeZone = ()
foreign import capi unsafe "sys/time.h gettimeofday"
c_gettimeofday :: Ptr CTimeVal -> Ptr CTimeZone -> IO CInt
-- |
-- Get current 'UnixTime' from OS.
getUnixTime :: IO UnixTime
getUnixTime = allocaBytes (#const sizeof(struct timeval)) $ \ p_timeval -> do
throwErrnoIfMinus1_ "getClockTime" $ c_gettimeofday p_timeval nullPtr
peek (castPtr p_timeval)
|
