On 22 June 2004 12:24, Volker Stolz wrote:

In local.glasgow-haskell-users, you wrote:

...

On 22 June 2004 10:39, Bernard James POPE wrote:

...

Supposing that such a thing is indeed possible is there any chance that it could be folded into GHC? (Then I wouldn't have to ship my own variant of the runtime with buddha.)

Certainly, I don't see any reason why not. It looks like a bolt-on extension rather than a global change.

A similar feature has been *removed* from Java recently for a good reason (rule of thumb: "If you used it, you did something wrong"). OTOH I see that it's handy for debuggers.

I bet the reason was that they don't have a good handle on asynchronous exceptions. But that raises a good point: it shouldn't be possible to stop a thread inside a block (i.e. Control.Exception.block). So stopThread should block until the target thread has actually stopped. This means adding the source thread to the blocked_exceptions list of the target thread. Cheers, Simon