Commit 6711398b authored by Simon Marlow's avatar Simon Marlow

add a raw callback performance benchmark

parent 0dd1973a
{-# OPTIONS_GHC -fffi #-}
-- Measure raw callback performance.
module Main where
import Control.Concurrent
import Control.Monad
import Foreign
import Foreign.C
import Data.IORef
import System.Environment
import System.IO
main = do
[s] <- getArgs
poke pcount (fromIntegral (read s))
callC =<< mkFunc (return ())
type FUNC = IO ()
foreign import ccall "&count" pcount :: Ptr CInt
foreign import ccall unsafe "wrapper"
mkFunc :: FUNC -> IO (FunPtr FUNC)
foreign import ccall threadsafe "cbits.h callC"
callC:: FunPtr FUNC -> IO ()
TOP = ../..
include $(TOP)/mk/
FAST_OPTS = 300000
NORM_OPTS = 3000000
SLOW_OPTS = 30000000
OBJS += Main_stub.o
include $(TOP)/mk/
#include "cbits.h"
int count;
void callC( FUNC* f) {
int i;
for(i=0;i<count;i++) f();
typedef void FUNC();
void callC( FUNC* f);
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