[fpc-devel] volatile variables
mschnell at lumino.de
Thu Jun 30 10:38:18 CEST 2011
On 06/29/2011 09:00 PM, Vinzent Höfler wrote:
> POSIX: pthread_mutex_(un)lock() & Co.
> Or, maybe I didn't understand the question...
I suppose, you did understand what I intended to say.
Regarding FPC, TCriticalSection is a decent encapsulation for
pthread_mutex_... when used in this way.
But e.g. if you use a TThreadList instance "myList" with multiple
threads it can't be the way to go to include any occurrence of
myList.xxx by a critical section just to make sure that the cache
synchronization has happened and the instance variable itself in fact is
Moreover I don't think it can be the way to go to enforce the
application programmer to plan his software in a way that somehow else
he needs to make sure that such an instance variable arrives in the
appropriate CPU's cache.
So I do hope that the constructors of the hardware, the OS and the
libraries already somehow did take care of this issue O:-) ,
More information about the fpc-devel