[Haskell-cafe] How does RTS judge that a STM transaction is blocked?

[Magicloud Magiclouds]

Sorry, where should I put your code?

On Wed, Feb 4, 2015 at 9:42 PM, Robin Palotai <palotai.robin at gmail.com>
wrote:

> More detail would be helpful, but sounds like an infinite (Async?) thread.
> Try
>
>     bracket (newStablePtr a) freeStablePtr (const $ wait a)
>
> +google to find out why.
>
> 2015-02-04 13:59 GMT+01:00 Magicloud Magiclouds <
> magicloud.magiclouds at gmail.com>:
>
>> Hi,
>>
>>   I met an issue while I was using xhb. When a certain property of root
>> window being changed, it was supposed to give me an AccessError. But
>> actually I got "thread blocked indefinitely in an STM transaction" when
>> I waitForEvent.
>>
>>   AFAIK, in xhb, it forks a thread to read what X server sends. Then
>> parse and put it into a TChan. waitForEvent reads from the TChan.
>>
>>   It is reasonable to me that if X server did not send anything, then
>> waitForEvent would be blocked. But apparently there are some other policies
>> in RTS.
>>
>>   So what is that? And how should I debug it?
>>
>> --
>> 竹密岂妨流水过
>> 山高哪阻野云飞
>>
>> And for G+, please use magiclouds#gmail.com.
>>
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>>
>


-- 
竹密岂妨流水过
山高哪阻野云飞

And for G+, please use magiclouds#gmail.com.
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