Problems with Mutex

[ketmar via Digitalmars-d-learn]

On Sun, 26 Oct 2014 22:53:07 +0000
Neven via Digitalmars-d-learn <digitalmars-d-learn at puremagic.com> wrote:

> Why cannot I globally have auto mutex = new Mutex? And why it 
> works now when I put __gshared?
this is because 'auto mutex = new Mutex' is not a global declaration,
it's thread-local declaration. all D variables are thread-locals by
default.

i.e. you have one indepented Mutex for each thread. and you initialized
it only in one thread, all other threads got unitialized Mutex objects.

having thread-locals instead of globals by default can be confusing if
you missed that in documentation. just use 'shared' or '__gshared' to
get "real" globals.
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