-- GENERATED by C->Haskell Compiler, version 0.20.1 The shapeless maps, 31 Oct 2014 (Haskell)
-- Edit the ORIGNAL .chs file instead!


{-# LINE 1 "./Foreign/CUDA/Driver/Event.chs" #-}
{-# LANGUAGE BangPatterns             #-}
{-# LANGUAGE CPP                      #-}
{-# LANGUAGE EmptyCase                #-}
{-# LANGUAGE EmptyDataDecls           #-}
{-# LANGUAGE ForeignFunctionInterface #-}
--------------------------------------------------------------------------------
-- |
-- Module    : Foreign.CUDA.Driver.Event
-- Copyright : [2009..2014] Trevor L. McDonell
-- License   : BSD
--
-- Event management for low-level driver interface
--
--------------------------------------------------------------------------------

module Foreign.CUDA.Driver.Event (

  -- * Event Management
  Event(..), EventFlag(..), WaitFlag,
  create, destroy, elapsedTime, query, record, wait, block

) where



{-# LINE 25 "./Foreign/CUDA/Driver/Event.chs" #-}


-- Friends
import Foreign.CUDA.Types
import Foreign.CUDA.Internal.C2HS
import Foreign.CUDA.Driver.Error

-- System
import Foreign
import Foreign.C
import Data.Maybe
import Control.Monad                                    ( liftM )
import Control.Exception                                ( throwIO )


--------------------------------------------------------------------------------
-- Event management
--------------------------------------------------------------------------------

-- |
-- Create a new event
--
{-# INLINEABLE create #-}
create :: [EventFlag] -> IO Event
create !flags = resultIfOk =<< cuEventCreate flags

{-# INLINE cuEventCreate #-}
cuEventCreate :: ([EventFlag]) -> IO ((Status), (Event))
cuEventCreate a2 =
  alloca $ \a1' -> 
  let {a2' = combineBitMasks a2} in 
  cuEventCreate'_ a1' a2' >>= \res ->
  let {res' = cToEnum res} in
  peekEvt  a1'>>= \a1'' -> 
  return (res', a1'')

{-# LINE 54 "./Foreign/CUDA/Driver/Event.chs" #-}

  where peekEvt = liftM Event . peek


-- |
-- Destroy an event
--
{-# INLINEABLE destroy #-}
destroy :: Event -> IO ()
destroy !ev = nothingIfOk =<< cuEventDestroy ev

{-# INLINE cuEventDestroy #-}
cuEventDestroy :: (Event) -> IO ((Status))
cuEventDestroy a1 =
  let {a1' = useEvent a1} in 
  cuEventDestroy'_ a1' >>= \res ->
  let {res' = cToEnum res} in
  return (res')

{-# LINE 67 "./Foreign/CUDA/Driver/Event.chs" #-}



-- |
-- Determine the elapsed time (in milliseconds) between two events
--
{-# INLINEABLE elapsedTime #-}
elapsedTime :: Event -> Event -> IO Float
elapsedTime !ev1 !ev2 = resultIfOk =<< cuEventElapsedTime ev1 ev2

{-# INLINE cuEventElapsedTime #-}
cuEventElapsedTime :: (Event) -> (Event) -> IO ((Status), (Float))
cuEventElapsedTime a2 a3 =
  alloca $ \a1' -> 
  let {a2' = useEvent a2} in 
  let {a3' = useEvent a3} in 
  cuEventElapsedTime'_ a1' a2' a3' >>= \res ->
  let {res' = cToEnum res} in
  peekFloatConv  a1'>>= \a1'' -> 
  return (res', a1'')

{-# LINE 81 "./Foreign/CUDA/Driver/Event.chs" #-}



-- |
-- Determines if a event has actually been recorded
--
{-# INLINEABLE query #-}
query :: Event -> IO Bool
query !ev =
  cuEventQuery ev >>= \rv ->
  case rv of
    Success  -> return True
    NotReady -> return False
    _        -> throwIO (ExitCode rv)

{-# INLINE cuEventQuery #-}
cuEventQuery :: (Event) -> IO ((Status))
cuEventQuery a1 =
  let {a1' = useEvent a1} in 
  cuEventQuery'_ a1' >>= \res ->
  let {res' = cToEnum res} in
  return (res')

{-# LINE 98 "./Foreign/CUDA/Driver/Event.chs" #-}



-- |
-- Record an event once all operations in the current context (or optionally
-- specified stream) have completed. This operation is asynchronous.
--
{-# INLINEABLE record #-}
record :: Event -> Maybe Stream -> IO ()
record !ev !mst =
  nothingIfOk =<< cuEventRecord ev (fromMaybe defaultStream mst)

{-# INLINE cuEventRecord #-}
cuEventRecord :: (Event) -> (Stream) -> IO ((Status))
cuEventRecord a1 a2 =
  let {a1' = useEvent a1} in 
  let {a2' = useStream a2} in 
  cuEventRecord'_ a1' a2' >>= \res ->
  let {res' = cToEnum res} in
  return (res')

{-# LINE 113 "./Foreign/CUDA/Driver/Event.chs" #-}



-- |
-- Makes all future work submitted to the (optional) stream wait until the given
-- event reports completion before beginning execution. Synchronisation is
-- performed on the device, including when the event and stream are from
-- different device contexts. Requires cuda-3.2.
--
{-# INLINEABLE wait #-}
wait :: Event -> Maybe Stream -> [WaitFlag] -> IO ()
wait !ev !mst !flags =
  nothingIfOk =<< cuStreamWaitEvent (fromMaybe defaultStream mst) ev flags

{-# INLINE cuStreamWaitEvent #-}
cuStreamWaitEvent :: (Stream) -> (Event) -> ([WaitFlag]) -> IO ((Status))
cuStreamWaitEvent a1 a2 a3 =
  let {a1' = useStream a1} in 
  let {a2' = useEvent a2} in 
  let {a3' = combineBitMasks a3} in 
  cuStreamWaitEvent'_ a1' a2' a3' >>= \res ->
  let {res' = cToEnum res} in
  return (res')

{-# LINE 135 "./Foreign/CUDA/Driver/Event.chs" #-}


-- |
-- Wait until the event has been recorded
--
{-# INLINEABLE block #-}
block :: Event -> IO ()
block !ev = nothingIfOk =<< cuEventSynchronize ev

{-# INLINE cuEventSynchronize #-}
cuEventSynchronize :: (Event) -> IO ((Status))
cuEventSynchronize a1 =
  let {a1' = useEvent a1} in 
  cuEventSynchronize'_ a1' >>= \res ->
  let {res' = cToEnum res} in
  return (res')

{-# LINE 146 "./Foreign/CUDA/Driver/Event.chs" #-}



foreign import ccall unsafe "Foreign/CUDA/Driver/Event.chs.h cuEventCreate"
  cuEventCreate'_ :: ((Ptr (Ptr ())) -> (CUInt -> (IO CInt)))

foreign import ccall unsafe "Foreign/CUDA/Driver/Event.chs.h cuEventDestroy"
  cuEventDestroy'_ :: ((Ptr ()) -> (IO CInt))

foreign import ccall unsafe "Foreign/CUDA/Driver/Event.chs.h cuEventElapsedTime"
  cuEventElapsedTime'_ :: ((Ptr CFloat) -> ((Ptr ()) -> ((Ptr ()) -> (IO CInt))))

foreign import ccall unsafe "Foreign/CUDA/Driver/Event.chs.h cuEventQuery"
  cuEventQuery'_ :: ((Ptr ()) -> (IO CInt))

foreign import ccall unsafe "Foreign/CUDA/Driver/Event.chs.h cuEventRecord"
  cuEventRecord'_ :: ((Ptr ()) -> ((Ptr ()) -> (IO CInt)))

foreign import ccall unsafe "Foreign/CUDA/Driver/Event.chs.h cuStreamWaitEvent"
  cuStreamWaitEvent'_ :: ((Ptr ()) -> ((Ptr ()) -> (CUInt -> (IO CInt))))

foreign import ccall safe "Foreign/CUDA/Driver/Event.chs.h cuEventSynchronize"
  cuEventSynchronize'_ :: ((Ptr ()) -> (IO CInt))