Re: Thread safe, thread-local variable
TlsAlloc/TlsSetValue/TslGetValue ?
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"Bart Simpson" <123evergreen@terrace.com> wrote in message
news:vOOdndpXGKhSEqTbRVnyuAA@bt.com...
(please ignore previous post).
I am writing a class which is an analytic engine that traverses a MxN
matrix space and makes calculations at each point in the matrix. The
calculations involve calling "exposed" functions via callbacks.
In a nutshell, I need to be able to pass the current position in the grid
to the callback function, so I have somehing like this:
//'global' vars
namespace
{
Point mypoint ;
}
class MyEngine
{
public:
void WriteCurrentPointValue();
//...
};
//"registered" functions
int foo()
{
Point point = ReadCurrentPointValue();
return DoSomething(point);
}
However, this soln is not thread safe in that if I have multiple instances
of the engine running in different threads, all bets are off. My question
is this:
How can I provide threadsafe, threadlocal 'global' variable for use as
discussed above?
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