Re: [boost] [lock-free] CDS -yet another lock-free library

Subject: Re: [boost] [lock-free] CDS -yet another lock-free library
From: Helge Bahmann (hcb_at_[hidden])
Date: 2010-03-30 04:47:43

On Tue, 30 Mar 2010, Khiszinsky, Maxim wrote:

> Another example of MSVC optimization error for x86 - see my class 
> cds::lock::RecursiveSpinT:
> void acquireLock()
> {
>   // TATAS algorithm
>   while ( !tryAcquireLock() ) {
> 	while ( m_spin.template load<membar_relaxed>() ) {
> 	   backoff()	;
>         // VC++ 2008 bug: the compiler generates infinite loop for int64 m_spin.

this is not a bug; the compiler is simply allowed to assume that the value 
of a variable does not change intermittently

Regards
Helge