On Saturday, 9 May 2015 at 18:41:59 UTC, bitwise wrote:
What does 'shared' do to member variables?
It makes sense to me to put it on a global variable, but what
sense does it make putting it on a member of a class? What
happens if you try to access a member of a class/struct
instance from another thread that is not marked 'shared'?
Also, I wasn't able to find any thorough documentation on
shared, so if someone has a link, that would be helpful.
Thanks
Bit
If a variable/class/struct etc is not shared, for variables and
struct, you find their initial value. For class, you get null.
For first timers (I started using shared keyword more than 2
years ago), do not forget that: a shared method is all about
saying that this method is defined for shared object. So, do not
get confused. It happened to me a lot.
Bad part of shared is that, you will be repeating it again, and
again, and again, and again, everywhere. So, try to be patient if
you are going to be using it for a long time.
Stupidly, shared variables' value cannot be increased/decreased
directly. Compiler says it is deprecated, and tells me to use
core.atomic.atomicop. You will see this as well. Hey compiler! I
know 100% that no other thing will be touching this variable.
