I’ve been asked to look at cleaning up issues that concern the way the
native C++ code in one module interacts with the native C++ code in another
module.
The module dependency tree is like this:
App -> Module B -> Module A -> node.js
Module A has a standard C++ class with the normal V8 / node.js API bindings
so that JavaScript code in Module B can call it via the “require('foo')”
primitive etc.
My problem is that there is JavaScript code in Module B that calls native
code in Module A and native code in Module B. All this works fine, but
there is a very expensive conversion process when data from the native code
in A has to be supplied to the native code in B.
The crazy thing is that the data that needs to be transferred is actually
defined in the native code in node.js itself (a BIGNUM in the OpenSSL
crypto library). So the current process is to get the native code in Module
A to convert the BIGNUM to a Buffer, this is then passed to the native code
in Module B which immediately turns it back into a BIGNUM.
So I started to look at the how I could get the native code in Module B to
directly interact with the native code in Module A (in just the same as
both modules interact, for example, with the OpenSSL code in node.js).
I’m very new to all this, but it would seem that because of the way npm
builds things. The native code in the two modules end up being compiled
separately and placed in different “.node” files.
So my questions are:
1, Is there a way for the code in Module B to get at the run-time linkage
information after Module A has been loaded?
2, If not, what is the recommended way to sort his out. The only thing that
comes to my mind is to abandon the nice modularity, remove Module A
altogether, and cut/paste the code directly into Module B, which would be
rather sad.
Thanks in advance….
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