Re: Compiling shared example.

[Peter Sommerfeld]

Am 28.10.2012, 08:06 Uhr, schrieb Ali Çehreli <acehr...@yahoo.com>:

On 10/26/2012 02:22 PM, Peter Sommerfeld wrote:

To learn about shared attribute I've copied nearly verbatim an
example from Andreis book. The code:

import core.atomic;

struct Data{
int value;
}

shared struct SharedStack(T) {

private shared struct Node{
T data;
Node* next;
this(T value){data = value;};
}
private Node* root;

// push

void push(T value){
auto n = new Node(value);
shared(Node)* oldRoot;
do {
oldRoot = root;
n.next = oldRoot;
} while(!cas(&root,oldRoot,n)); // line 30
}
// ...
}

SharedStack!(Data) q;

void main(string[] args){

Data m;
q.push(m); // line 40
}

I got the following error (dmd 2.060 win):

(40) Error function main.SharedStack!(Data).SharedStack.push(Data value)
shared is not callable using argument types (Data)

(30) template core.atomic.cas does not match any function template
declaration

What is wrong here ?

Peter

The following two changes are the workaround at least for compilation:

         auto n = cast(shared)new Node(value);
// ...

shared SharedStack!(Data) q;

Ali

Thanks Ali, that keeps me going for now. But I wonder why I
have do declare the variables shared if the data are declared
to be shared. Is that a shortcoming of the current compiler ?
Anyway, I can continue ...

BTW: Thanks for your book! It is of great help for beginners
like me!

Peter