Re: TCriticalSection between 2 threads

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#2770

From: Eelke
Date: Tue, 28 Nov 2006 10:18

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Tumurbaatar S. wrote:
> To communicate and pass data (several integers and AnsiString's) between 2 
> threads,
> I use TCriticalSection object. The first thread only writes/modifies the 
> protected section and
> the second one only reads. Of course, read/write operations are executed 
> within TCriticalSection's
> Enter/Leave(). My question: do I need to use Enter/Leave() if the writing 
> thread (the 1st one)
> needs to _read_ data that it modified? 
> 
> 
No you don't have to as problems can only arise when data is written 
while it is being read.

Actually for trivial data like a single integer no critical section is 
needed because the assignment of an int is an atomic operation.

Eelke

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