Am Mittwoch, 15. März 2006 18:16 schrieb Duncan Coutts:
On Wed, 2006-03-15 at 17:01 +, Brian Hulley wrote:
The above two things were what I was expecting the compiler to do for me
instead of me having to manually write a wrapper function in Haskell
using withForeignPtr for each wrapper
Hi -
I've got the beginnings of an API for a GUI system as follows:
data DWindow a
data DEdit a
type Window = DWindow
type Edit a = DWindow (DEdit a)
foreign import ccall duma_init :: IO ()
foreign import ccall duma_run :: IO ()
foreign import ccall duma_release :: FunPtr (Ptr (Window a) - IO
Brian Hulley wrote:
I've got the beginnings of an API for a GUI system as follows:
...
addTop :: ForeignPtr (Window a) - IO ()
addTop w = withForeignPtr w duma_addTop
This works, but it seems a bit of a pain to have to manually convert
between ForeignPtr's and Ptr's all the time.
In
Esa Ilari Vuokko wrote:
On 3/15/06, Brian Hulley [EMAIL PROTECTED] wrote:
[snip]
(Not directly related, but maybe useful to know)
Stricly speaking, asynchronous exception may occur in between, and
this
code should in fact be surrounded by block to prevent resource
leaks.
createEdit = block $
Simon Marlow wrote:
Brian Hulley wrote:
I've got the beginnings of an API for a GUI system as follows:
...
addTop :: ForeignPtr (Window a) - IO ()
addTop w = withForeignPtr w duma_addTop
This works, but it seems a bit of a pain to have to manually convert
between ForeignPtr's and Ptr's all
On Wed, 2006-03-15 at 17:01 +, Brian Hulley wrote:
Simon Marlow wrote:
This is the way it used to be in GHC before the FFI. In the FFI we
moved to withForeignPtr instead. IIRC, the motivation was something
along these lines:
- allowing ForeignPtr to be passed directly to a
