On Fri, Aug 6, 2021 at 2:41 PM J <zon8resea...@gmail.com> wrote:
>
> Using embedded v8, I'm trying to clear the current variables and functions.
>
> I've found that in order to save having to recreate the isolate, which can be
> quite slow, I can just create a new context from the isolate. However, the
> old context still exists in memory and its not needed.
>
> How can I delete an old context now that I don't need it?
>
> Example code snippet:
>
> ```
> // Creates a new execution environment containing the built-in
> // functions.
> v8::Local<v8::Context> CreateShellContext(v8::Isolate* isolate) {
> // Create a template for the global object.
> v8::Local<v8::ObjectTemplate> global = v8::ObjectTemplate::New(isolate);
> // Bind the global 'print' function to the C++ Print callback.
> global->Set(isolate, "print", v8::FunctionTemplate::New(isolate, Print));
> // Bind the global 'read' function to the C++ Read callback.
> global->Set(isolate, "read", v8::FunctionTemplate::New(isolate, Read));
> // Bind the global 'load' function to the C++ Load callback.
> global->Set(isolate, "load", v8::FunctionTemplate::New(isolate, Load));
> // Bind the 'quit' function
> global->Set(isolate, "quit", v8::FunctionTemplate::New(isolate, Quit));
> // Bind the 'version' function
> global->Set(isolate, "version", v8::FunctionTemplate::New(isolate,
> Version));
> return v8::Context::New(isolate, NULL, global);
> }
> ```
>
> ```
> v8::Local<v8::Context> context = CreateShellContext(isolate);
> if (context.IsEmpty()) {
> fprintf(stderr, "Error creating context\n");
> return 1;
> }
> if (run_shell) RunShell(context, platform.get());
> ```
This question comes up every six months or so. If you search the
archives, you can probably find a longer discussion, but the short
answer is that you don't, it gets garbage collected when there are no
more references to it.
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