I am writing a GPU database and looking at using javascript as the language
to query data and node.js looks ideal for sending and receiving binary
data. I have been writing a node addon as I have written it in C++. However
I have problem with my node.js addon as my c++ objects are not being
destructed when I am not explicitly using the new operator. If I am using
the new operator, it's fine, it's just when a call a method that creates a
new method - like copy(), etc.
Please could I get some advice.
Let me show the code that frees GPU memory correctly, the code doesn't free
correctly and my node.js addon implementation so far.
1. Code that correctly frees GPU memory
This piece of code correctly frees the GPU memory by calling the object
destructor, which makes a call to free the GPU memory:
*var gpudb = require('./build/Release/gpudb');*
*var n = 1000000;*
*for (var i = 0; i < 10000; ++i) {*
* var col = new cream.GpuArray(n);*
*}*
However, this piece of code doesn't call the objects' destructor.
*var gpudb = require('./build/Release/gpudb');*
*var n = 1000000;*
*var col = new cream.GpuArray(n);*
*for (var i = 0; i < 10000; ++i) {*
* var copyOfCol = col.copy();*
*}*
Now, here's the functions for the constructor and copy function
respectively.
*Handle<Value> GpuVector::New(const Arguments& args) {*
* HandleScope scope;*
* if (args.IsConstructCall()) {*
* // Invoked as constructor: `new **GpuVector**(...)`*
* int value = args[0]->IsUndefined() ? 0 : args[0]->NumberValue();*
*GpuVector*** obj = new **GpuVector**(value);*
* obj->Wrap(args.This());*
* return args.This();*
* } else {*
* // Invoked as plain function `**GpuVector**(...)`, turn into construct
call.*
* const int argc = 1;*
* Local<Value> argv[argc] = { args[0] };*
* return scope.Close(constructor->NewInstance(argc, argv));*
* }*
*}*
*Handle<Value> GpuArray::Copy(const Arguments& args) {*
* HandleScope scope;*
* GpuArray* in = ObjectWrap::Unwrap<**GpuVector**>(args.This());*
* GpuArray* out = new GpuArray(in); // creates new gpu memory slot and
copies the data over*
* out->Wrap(args.This());*
* return args.This();*
*}*
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