Re: threads memory access

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#6286

From: Oliver Rutsch
Date: Mon, 23 May 2005 11:59

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Hi Jonathan Benedicto,

> 
> Now, when they need a buffer, they just loop through the vector, 
> finding one with its Locked == false, and then set the Locked to true, 
> fill the char* and int, and then send a pointer to it to the 3rd 
> thread. Once the 3rd thread is finished with it, it just sets the 
> Locked to false.

I would never use boolean locks "by hand". Use instead a critical 
section for your structure. When we come to hyper threading and 
dual/multi core systems even a bool-write is not an atomic operation 
anymore. And what do you do if one thread finds the structure locked? It 
polls the bool and consumes time. A critical section manages this all 
for you.

Bye, Oliver

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