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async/threaded calls to natives - Printable Version

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+--- Thread: async/threaded calls to natives (/showthread.php?tid=557333)


async/threaded calls to natives - ikkentim - 13.01.2015

Hi,

I'm working on my plugin, SampSharp and I was working some threading related stuff. In this threaded function I use calls to sampgdk_logprintf. This seems to work fine. I also tried calling the SendClientMessage native. This seems to work fine as well.

My question is: Is calling natives from different threads bad and could calling natives from different threads cause issues/crashes?

my only guess would by that pawn's stack might corrupt at simultaneous calls but I'm not even sure that the machine touches the stack when calling natives trough sampgdk.

Re: async/threaded calls to natives - nGen.SoNNy - 13.01.2015

Wrong section dude

Re: async/threaded calls to natives - maddinat0r - 13.01.2015

Quote:
Originally Posted by nGen.SoNNy
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Wrong section dude
Yeah, no, not really.

@OP:
Yes, calling natives outside the PAWN thread is bad and will lead you sooner or later to a crash. Even if none of the AMX-stuff would be touched, there are still the underlying network functions and you can't know if they are implemented thread-safe or not.

Re: async/threaded calls to natives - ikkentim - 13.01.2015

Quote:
Originally Posted by maddinat0r
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Yeah, no, not really.

@OP:
Yes, calling natives outside the PAWN thread is bad and will lead you sooner or later to a crash. Even if none of the AMX-stuff would be touched, there are still the underlying network functions and you can't know if they are implemented thread-safe or not.
Hmm.. I guess you are right. Would you think printing to the log (trough sampgdk, sampgdk_logprintf) alone would be safe to use? It's quite a fundamental function

Re: async/threaded calls to natives - maddinat0r - 13.01.2015

I'd add a mutex to be 100%ly sure, but IMHO (and by experience) logprintf is working fine when called from multiple threads.

Re: async/threaded calls to natives - ikkentim - 13.01.2015

Thanks you all for the info!

Re: async/threaded calls to natives - ][Noname][ - 14.01.2015

logprintf (printf in pawn) are multithread safe, but whats happen?
logprintf("111") in 1'st thread
logprintf("222") in 2'nd
you can find - 112122