On 02 October 2004 13:04, Tomasz Zielonka wrote:
> On Fri, Oct 01, 2004 at 09:34:36PM +0100, Simon Marlow wrote:
>>
>> Not currently, but I could probably implement the equivalent
>> (hGetArrayNonBlocking).
>
> It is perhaps not closely related, but could we also have
> Network.Socket recvFrom / sendTo working on raw buffers?
>
> I've attached a proposed implementation. It moves most of code to
> recvBufFrom and sendBufTo, and changes recvFrom / sendTo to use the
> *Buf* functions.
Committed, thanks!
> It would be nice if these functions could be used to implement
> efficient recvFromArray / sendToArray (without copying), but I don't
> know if it's possible to get the pointer from MutableByteArray. Is
> there a danger that GC invalidates the pointer?
It is possible to get a Ptr from a MutableByteArray, but only if the
array was allocated pinned, and only if you make sure it lives across
any foreign calls (using touch#). This is how Foreign.alloca works, for
example.
Cheers,
Simon
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