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Re: [charm] Pb with inheritance


Chronological Thread 
  • From: Christian Perez <christian.perez AT inria.fr>
  • To: Aaron Becker <abecker3 AT illinois.edu>
  • Cc: "charm AT cs.uiuc.edu" <charm AT cs.uiuc.edu>, Gengbin Zheng <zhenggb AT gmail.com>
  • Subject: Re: [charm] Pb with inheritance
  • Date: Tue, 01 Jun 2010 13:49:15 +0200
  • List-archive: <http://lists.cs.uiuc.edu/pipermail/charm>
  • List-id: CHARM parallel programming system <charm.cs.uiuc.edu>
  • Organization: INRIA/LIP

In the ci file, A inherits from I1 and I2.
So, I guess I should be able to invoke foo1 or foo2 on
CProxy_A.

It is basically the same example as in
http://charm.cs.uiuc.edu/manuals/html/charm++/4_1.html
but with multiple inheritance.

Christian

On 06/01/2010 01:45 PM, Aaron Becker wrote:
Notice that in your example code you are invoking foo1 and foo2 on an
object of type CProxy_A, not type A. You can't invoke non-entry
methods of an object through its proxy, except by calling ckLocal if
it's a local chare. Otherwise you could call non-entry methods on
remote objects, which will never work. The name resolution for
CProxy_A finds the entry methods in the base classes because CProxy_A
has no foo1 and foo2 methods of its own.

Aaron

On Tue, Jun 1, 2010 at 3:54 AM, Christian Perez
<christian.perez AT inria.fr>
wrote:
Hello,

please consider the attached example, where a chare A inherits from 2 others
chare I1& I2:

chare I1
{
entry void foo1();
};

chare I2
{
entry void foo2();
};


chare A : I1, I2
{
entry A();
};

When invoking foo2 on A, either foo2 of the class I2 is called (not A::foo2
!) if methods foo1& foo2 are not virtual
or foo1 on A (vtable issue?) is invoked if they are virtual. Though class
inheritance is not virtual, can it be the same issue?

Any help is welcome.

Christian

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