{-# LANGUAGE RecordWildCards #-}
module System.Log.FastLogger.SingleLogger (
SingleLogger,
newSingleLogger,
) where
import Control.Concurrent (MVar, forkIO, newEmptyMVar, putMVar, takeMVar)
import Control.Concurrent.STM
import System.Log.FastLogger.FileIO
import System.Log.FastLogger.IO
import System.Log.FastLogger.Imports
import System.Log.FastLogger.LogStr
import System.Log.FastLogger.Write
data Ent = F (MVar ()) Bool | L LogStr
type Q = [Ent]
data SingleLogger = SingleLogger
{ SingleLogger -> IORef (LogStr, Q)
slgrRef :: IORef (LogStr, Q)
, SingleLogger -> Bool -> IO ()
slgrFlush :: Bool -> IO ()
, SingleLogger -> IO ()
slgrWakeup :: IO ()
, SingleLogger -> Buffer
slgrBuffer :: Buffer
, SingleLogger -> Int
slgrBufSize :: BufSize
, SingleLogger -> IORef FD
slgrFdRef :: IORef FD
}
instance Loggers SingleLogger where
stopLoggers :: SingleLogger -> IO ()
stopLoggers = SingleLogger -> IO ()
System.Log.FastLogger.SingleLogger.stopLoggers
pushLog :: SingleLogger -> LogStr -> IO ()
pushLog = SingleLogger -> LogStr -> IO ()
System.Log.FastLogger.SingleLogger.pushLog
flushAllLog :: SingleLogger -> IO ()
flushAllLog = SingleLogger -> IO ()
System.Log.FastLogger.SingleLogger.flushAllLog
writer
:: BufSize
-> Buffer
-> IORef FD
-> TVar Int
-> IORef (LogStr, Q)
-> IO ()
writer :: Int -> Buffer -> IORef FD -> TVar Int -> IORef (LogStr, Q) -> IO ()
writer Int
bufsize Buffer
buf IORef FD
fdref TVar Int
tvar IORef (LogStr, Q)
ref = Int -> IO ()
loop (Int
0 :: Int)
where
loop :: Int -> IO ()
loop Int
cnt = do
cnt' <- STM Int -> IO Int
forall a. STM a -> IO a
atomically (STM Int -> IO Int) -> STM Int -> IO Int
forall a b. (a -> b) -> a -> b
$ do
n <- TVar Int -> STM Int
forall a. TVar a -> STM a
readTVar TVar Int
tvar
check (n /= cnt)
return n
msgs <- reverse <$> atomicModifyIORef' ref (\(LogStr
msg, Q
q) -> ((LogStr
msg, []), Q
q))
cont <- go msgs
when cont $ loop cnt'
go :: Q -> IO Bool
go [] = Bool -> IO Bool
forall a. a -> IO a
forall (m :: * -> *) a. Monad m => a -> m a
return Bool
True
go (F MVar ()
mvar Bool
cont : Q
msgs) = do
MVar () -> () -> IO ()
forall a. MVar a -> a -> IO ()
putMVar MVar ()
mvar ()
if Bool
cont then Q -> IO Bool
go Q
msgs else Bool -> IO Bool
forall a. a -> IO a
forall (m :: * -> *) a. Monad m => a -> m a
return Bool
False
go (L msg :: LogStr
msg@(LogStr Int
len Builder
_) : Q
msgs)
| Int
len Int -> Int -> Bool
forall a. Ord a => a -> a -> Bool
<= Int
bufsize = Buffer -> IORef FD -> LogStr -> IO ()
writeLogStr Buffer
buf IORef FD
fdref LogStr
msg IO () -> IO Bool -> IO Bool
forall a b. IO a -> IO b -> IO b
forall (m :: * -> *) a b. Monad m => m a -> m b -> m b
>> Q -> IO Bool
go Q
msgs
| Bool
otherwise = IORef FD -> LogStr -> IO ()
writeBigLogStr IORef FD
fdref LogStr
msg IO () -> IO Bool -> IO Bool
forall a b. IO a -> IO b -> IO b
forall (m :: * -> *) a b. Monad m => m a -> m b -> m b
>> Q -> IO Bool
go Q
msgs
newSingleLogger :: BufSize -> IORef FD -> IO SingleLogger
newSingleLogger :: Int -> IORef FD -> IO SingleLogger
newSingleLogger Int
bufsize IORef FD
fdref = do
tvar <- Int -> IO (TVar Int)
forall a. a -> IO (TVar a)
newTVarIO Int
0
ref <- newIORef (mempty, [])
buf <- getBuffer bufsize
_ <- forkIO $ writer bufsize buf fdref tvar ref
let wakeup = STM () -> IO ()
forall a. STM a -> IO a
atomically (STM () -> IO ()) -> STM () -> IO ()
forall a b. (a -> b) -> a -> b
$ TVar Int -> (Int -> Int) -> STM ()
forall a. TVar a -> (a -> a) -> STM ()
modifyTVar' TVar Int
tvar (Int -> Int -> Int
forall a. Num a => a -> a -> a
+ Int
1)
flush Bool
cont = do
mvar <- IO (MVar ())
forall a. IO (MVar a)
newEmptyMVar
let fin = MVar () -> Bool -> Ent
F MVar ()
mvar Bool
cont
atomicModifyIORef' ref (\(LogStr
old, Q
q) -> ((LogStr
forall a. Monoid a => a
mempty, Ent
fin Ent -> Q -> Q
forall a. a -> [a] -> [a]
: LogStr -> Ent
L LogStr
old Ent -> Q -> Q
forall a. a -> [a] -> [a]
: Q
q), ()))
wakeup
takeMVar mvar
return $
SingleLogger
{ slgrRef = ref
, slgrFlush = flush
, slgrWakeup = wakeup
, slgrBuffer = buf
, slgrBufSize = bufsize
, slgrFdRef = fdref
}
pushLog :: SingleLogger -> LogStr -> IO ()
pushLog :: SingleLogger -> LogStr -> IO ()
pushLog SingleLogger{Int
IO ()
Buffer
IORef (LogStr, Q)
IORef FD
Bool -> IO ()
slgrRef :: SingleLogger -> IORef (LogStr, Q)
slgrFlush :: SingleLogger -> Bool -> IO ()
slgrWakeup :: SingleLogger -> IO ()
slgrBuffer :: SingleLogger -> Buffer
slgrBufSize :: SingleLogger -> Int
slgrFdRef :: SingleLogger -> IORef FD
slgrRef :: IORef (LogStr, Q)
slgrFlush :: Bool -> IO ()
slgrWakeup :: IO ()
slgrBuffer :: Buffer
slgrBufSize :: Int
slgrFdRef :: IORef FD
..} nlogmsg :: LogStr
nlogmsg@(LogStr Int
nlen Builder
_)
| Int
nlen Int -> Int -> Bool
forall a. Ord a => a -> a -> Bool
> Int
slgrBufSize = do
IORef (LogStr, Q) -> ((LogStr, Q) -> ((LogStr, Q), ())) -> IO ()
forall a b. IORef a -> (a -> (a, b)) -> IO b
atomicModifyIORef' IORef (LogStr, Q)
slgrRef (\(LogStr
old, Q
q) -> ((LogStr
forall a. Monoid a => a
mempty, LogStr -> Ent
L LogStr
nlogmsg Ent -> Q -> Q
forall a. a -> [a] -> [a]
: LogStr -> Ent
L LogStr
old Ent -> Q -> Q
forall a. a -> [a] -> [a]
: Q
q), ()))
IO ()
slgrWakeup
| Bool
otherwise = do
wake <- IORef (LogStr, Q)
-> ((LogStr, Q) -> ((LogStr, Q), Bool)) -> IO Bool
forall a b. IORef a -> (a -> (a, b)) -> IO b
atomicModifyIORef' IORef (LogStr, Q)
slgrRef (LogStr, Q) -> ((LogStr, Q), Bool)
checkBuf
when wake slgrWakeup
where
checkBuf :: (LogStr, Q) -> ((LogStr, Q), Bool)
checkBuf (ologmsg :: LogStr
ologmsg@(LogStr Int
olen Builder
_), Q
q)
| Int
slgrBufSize Int -> Int -> Bool
forall a. Ord a => a -> a -> Bool
< Int
olen Int -> Int -> Int
forall a. Num a => a -> a -> a
+ Int
nlen = ((LogStr
nlogmsg, LogStr -> Ent
L LogStr
ologmsg Ent -> Q -> Q
forall a. a -> [a] -> [a]
: Q
q), Bool
True)
| Bool
otherwise = ((LogStr
ologmsg LogStr -> LogStr -> LogStr
forall a. Semigroup a => a -> a -> a
<> LogStr
nlogmsg, Q
q), Bool
False)
flushAllLog :: SingleLogger -> IO ()
flushAllLog :: SingleLogger -> IO ()
flushAllLog SingleLogger{Int
IO ()
Buffer
IORef (LogStr, Q)
IORef FD
Bool -> IO ()
slgrRef :: SingleLogger -> IORef (LogStr, Q)
slgrFlush :: SingleLogger -> Bool -> IO ()
slgrWakeup :: SingleLogger -> IO ()
slgrBuffer :: SingleLogger -> Buffer
slgrBufSize :: SingleLogger -> Int
slgrFdRef :: SingleLogger -> IORef FD
slgrRef :: IORef (LogStr, Q)
slgrFlush :: Bool -> IO ()
slgrWakeup :: IO ()
slgrBuffer :: Buffer
slgrBufSize :: Int
slgrFdRef :: IORef FD
..} = do
IORef (LogStr, Q) -> ((LogStr, Q) -> ((LogStr, Q), ())) -> IO ()
forall a b. IORef a -> (a -> (a, b)) -> IO b
atomicModifyIORef' IORef (LogStr, Q)
slgrRef (\(LogStr
old, Q
q) -> ((LogStr
forall a. Monoid a => a
mempty, LogStr -> Ent
L LogStr
old Ent -> Q -> Q
forall a. a -> [a] -> [a]
: Q
q), ()))
Bool -> IO ()
slgrFlush Bool
True
stopLoggers :: SingleLogger -> IO ()
stopLoggers :: SingleLogger -> IO ()
stopLoggers SingleLogger{Int
IO ()
Buffer
IORef (LogStr, Q)
IORef FD
Bool -> IO ()
slgrRef :: SingleLogger -> IORef (LogStr, Q)
slgrFlush :: SingleLogger -> Bool -> IO ()
slgrWakeup :: SingleLogger -> IO ()
slgrBuffer :: SingleLogger -> Buffer
slgrBufSize :: SingleLogger -> Int
slgrFdRef :: SingleLogger -> IORef FD
slgrRef :: IORef (LogStr, Q)
slgrFlush :: Bool -> IO ()
slgrWakeup :: IO ()
slgrBuffer :: Buffer
slgrBufSize :: Int
slgrFdRef :: IORef FD
..} = do
Bool -> IO ()
slgrFlush Bool
False
Buffer -> IO ()
freeBuffer Buffer
slgrBuffer