[Lazarus] thread safe
Henry Vermaak
henry.vermaak at gmail.com
Tue Jun 28 12:13:42 CEST 2011
On 27/06/11 23:31, Andrew Brunner wrote:
> AMD vs Intel. Kernels Linux vs Windows. The only way to make sure
How does the kernel matter?
Other than the cpu, compilers can also reorder instructions. You can
use __asm__ __volatile__("": : :"memory") in c to stop gcc from screwing
around with the order, for example. This is of course if a hardware
memory barrier isn't necessary.
> you can get code in proper order with regard to memory assignments (
> specifically variables) is to use Interlocked methods. This is why
> they were designed.
No. You have to use memory barriers for this. Atomic operations are
only useful for single data elements.
Read Paul McKenney's excellent book:
http://kernel.org/pub/linux/kernel/people/paulmck/perfbook/perfbook.html
Henry
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