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Dev Checkpoint 201906252113

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Chris Walker 2019-06-25 21:13:49 -06:00
commit e7993dca97
3 changed files with 79 additions and 107 deletions
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119
Examples/javascript/native/example.i
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@ -4,100 +4,37 @@
%wrapper
%{
#include <cstring>
#include <string>
#if (V8_MAJOR_VERSION-0) < 4 && (SWIG_V8_VERSION < 0x031903)
typedef v8::Handle<v8::Value> V8ReturnValue;
typedef v8::Arguments V8Arguments;
# define V8_RETURN(val) return scope.Close(val)
#else
typedef void V8ReturnValue;
typedef v8::FunctionCallbackInfo<v8::Value> V8Arguments;
# define V8_RETURN(val) args.GetReturnValue().Set(val); return
#endif
#if (V8_MAJOR_VERSION-0) < 4 && (SWIG_V8_VERSION < 0x032318)
# define V8_UNDEFINED() v8::Undefined()
#else
# define V8_UNDEFINED() v8::Undefined(v8::Isolate::GetCurrent())
#endif
#if (V8_MAJOR_VERSION-0) < 4 && (SWIG_V8_VERSION < 0x032117)
# define V8_HANDLESCOPE() v8::HandleScope scope
#elif (V8_MAJOR_VERSION-0) < 4 && (SWIG_V8_VERSION < 0x032224)
# define V8_HANDLESCOPE() v8::HandleScope scope(v8::Isolate::GetCurrent());
#else
# define V8_HANDLESCOPE() v8::HandleScope scope(v8::Isolate::GetCurrent());
#endif
// 'unused' attribute only necessary for GNUC < v3.4
static /* __attribute__ ((__unused__)) */ V8ErrorHandler V8_ErrorHandler;
typedef struct worker_packet {
// -- basic --
uv_work_t request;
v8::Persistent<v8::Function> callback;
// -- persistent variables --
std::string result;
// -- async operation --
void (*execute)(std::string&);
} worker_packet;
// async process - parallel with node thread
static void work_async(uv_work_t* request) {
worker_packet* packet = static_cast<worker_packet*>(request->data);
packet->execute(packet->result);
// add a delay for dramatic effect - not necessary
}
// send async result back to node's thread
static void work_complete(uv_work_t* request, int status) {
V8_HANDLESCOPE();
v8::Isolate* iso = v8::Isolate::GetCurrent();
worker_packet* packet = static_cast<worker_packet*>(request->data);
const int argc = 1;
v8::Handle<v8::Value> argv[] = {
v8::String::NewFromUtf8(iso, packet->result.c_str())
};
v8::Local<v8::Function>::New(iso, packet->callback)->Call
(iso->GetCurrentContext()->Global(), argc, argv);
packet->callback.Reset();
delete work;
}
static void entry(const V8Arguments& args) {
v8::Isolate* iso = v8::Isolate::GetCurrent();
v8::Local<v8::Value> value = args[0];
if (!value->IsFunction()) {
V8_ErrorHandler.error((-1), "Invalid parameter type.");
return;
#ifdef SWIG_V8_VERSION /* Engine: Node || V8 */
static SwigV8ReturnValue JavaScript_do_work(const SwigV8Arguments &args) {
SWIGV8_HANDLESCOPE();
const int MY_MAGIC_NUMBER = 5;
v8::Handle<v8::Value> jsresult =
SWIG_From_int(static_cast< int >(MY_MAGIC_NUMBER));
if (args.Length() != 0)
SWIG_exception_fail(SWIG_ERROR, "Illegal number of arguments.");
SWIGV8_RETURN(jsresult);
fail:
SWIGV8_RETURN(SWIGV8_UNDEFINED());
}
worker_packet* packet = new worker_packet();
packet->request.data = packet;
packet->execute = [](std::string& res) { res = "My delayed message."; };
v8::Local<v8::Function> callback = v8::Local<v8::Function>::Cast(value);
packet->callback.Reset(iso, callback);
uv_queue_work(uv_default_loop(), &packet->request,
work_async, work_complete);
args.GetReturnValue().Set(Undefined(iso));
}
#else /* Engine: JavaScriptCore */
V8ReturnValue JavaScript_exampleV8_callback_function(const V8Arguments& args) {
V8_HANDLESCOPE();
if (args.Length() != 1) {
V8_ErrorHandler.error((-1), "Illegal number of arguments.");
V8_RETURN(V8_UNDEFINED());
}
entry(args);
v8::Handle<v8::Value> jsresult = V8_UNDEFINED();
V8_RETURN(jsresult);
}
static JSValueRef JavaScript_do_work(JSContextRef context,
JSObjectRef function, JSObjectRef thisObject, size_t argc,
const JSValueRef argv[], JSValueRef* exception) {
const int MY_MAGIC_NUMBER = 5;
JSValueRef jsresult =
SWIG_From_int SWIG_JSC_FROM_CALL_ARGS(
static_cast< int >(MY_MAGIC_NUMBER));
if (argc != 0)
SWIG_exception_fail(SWIG_ERROR, "Illegal number of arguments.");
return jsresult;
fail:
return JSValueMakeUndefined(context);
}
#endif
%}