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| Date | Wed, 06 Feb 2013 09:59:15 -0500 |
| From | Dave Angel <d@davea.name> |
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| Subject | Re: each process only has one main thread ,right ? |
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On 02/06/2013 06:52 AM, Steven D'Aprano wrote: > iMath wrote: > >> When a program starts up, one thread begins running immediately. This is >> usually called the main thread of the program ,so each process only has >> one main thread ,right ? > > I'm not sure if we should say "each process HAS one main thread" or "each > process IS one main thread", or whether there is in fact a difference. But, > yes, each process is equivalent to a single thread. > > Each process merely starts out as a single thread. If it creates other threads, they are usually not considered main threads. OP: But note that if a process is running under a debugger, or an IDE, that debugger may inject one or more threads into the process. The only place I now of where we care whether a particular thread in a process is "the main thread" is with a gui, which usually can only sit in a single, "main" thread. Any gui-related processing done in other threads must be done very carefully. -- DaveA
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each process only has one main thread ,right ? iMath <redstone-cold@163.com> - 2013-02-06 03:23 -0800
Re: each process only has one main thread ,right ? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-02-06 22:52 +1100
Re: each process only has one main thread ,right ? Dave Angel <d@davea.name> - 2013-02-06 09:59 -0500
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