Shared memory allocation without use of SHMOP or OSSP MM

Well, thread subject says it all - but here is the twist. With the above two, it is possible to use shared memory within your applications - the only downfall is that niether works cross platform (*nix/win).

I am not sure if this can even be done, but is there a php extension floating around that anyone has come across that will enable the use of sm for cross platform implementation - and that is dynamically loadable (which I think may make it not possible).

If no one has come accross any such thing, is it possible to create a C++ extension for php that will enable this and with dynamic loading capabilities?

Moving to C forum...

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Since in C forum now, I will change the above a little -

Is it possible to create a C++ extension for php that will enable something that is close to the above libs and with dynamic loading capabilities or dynamically loadable by the zend engine?