[Haskell-cafe] Re: Hugs vs GHC (again)

[Gracjan Polak]

Marcin 'Qrczak' Kowalczyk wrote:
 >
 > "fileRead :: File -> FileOffset -> Integer -> Buffer -> IO ()"
 >
 > This is unimplementable safely if the descriptor is read concurrently
 > by different processes. The current position is shared.
 >

UNIX98 defines function:

extern ssize_t pread (int __fd, void *__buf, size_t __nbytes,
                       __off_t __offset);

Windows has:

BOOL ReadFile(
   HANDLE hFile,
   LPVOID lpBuffer,
   DWORD nNumberOfBytesToRead,
   LPDWORD lpNumberOfBytesRead,
   LPOVERLAPPED lpOverlapped
);

Where that OVERLAPPED structure contains information where to start read.

Seems implementable to me, or am I wrong?

-- 
Gracjan