Mallocator

[Erik Smith via Digitalmars-d]

On Thursday, 3 March 2016 at 19:32:40 UTC, Brian Schott wrote:
> On Thursday, 3 March 2016 at 19:01:52 UTC, Erik Smith wrote:
>> I get the error "allocate is not callable using a non-shared 
>> object" and I'm not sure how to resolve it.
>
> Are you calling `Mallocator.allocate()` or 
> `Mallocator.instance.allocate()`?

The later works and qualifying the allocator member variable 
shared seems to solve the issue.  Example:

struct A(T) {
     alias Allocator = T;
     shared Allocator allocator;
     this(string url="") {
         allocator = Allocator();
         void *p1 = cast(void*)(allocator.allocate(1024));
         //void p2[] = allocator.allocate(1024); // ICE
     }
}

A!Mallocator a;


However, this seems bad because it assumes that all allocators 
are shared.  It appears, however that the qualifier can be 
attached to the type so maybe there is some meta-programming 
tricks that can be used:

alias Allocator = shared T;

I'm not sure if I'm on the right track.  Note also the ICE in the 
example above.

erik