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View Code? Open in Web Editor NEWjs::bind makes any C++ function, member function or lambda as a Javascript callback.
License: Boost Software License 1.0
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Error When bind function with 0 args.
Hello.
I convert LoadScript function from Js to C++, set events onload and onerror all ok , but I get following error when onload event is launched.
Summary: Script is loaded but when onload is executed get error.
C++ Function
emscripten::val LoadScript(emscripten::val scriptpath)
{
using namespace emscripten;
String hash = scriptpath.as<String>();
if(!val::global("VMain")["Loaded"][hash].isUndefined())
{
auto promiseCallback = [&](val resolve, val reject){
resolve(hash);
};
return val::global("Promise").new_(js::bind(promiseCallback, std::placeholders::_1, std::placeholders::_2));
}
auto promiseCallback = [&](val resolve, val reject) -> void{
resolve();
val script = val::global("document").call<val>("createElement", val("script"));
auto onloadCallback = [&]() -> void{ //NOT EXECUTED - check errors
emscripten_console_log("On load");
resolve(hash);
};
script.set("onload", js::bind(onloadCallback)); //No errors here
auto onerrorCallback = [&]() -> void{ //NOT EXECUTED - check errors
emscripten_console_log("On error");
reject(hash);
};
script.set("onerror", js::bind(onerrorCallback)); //No errors here
script.set("src",scriptpath);
script.set("type", val("text/javascript"));
val::global("VMain")["Loaded"].set(hash, val(true));
val::global("document")["body"].call<val>("appendChild", script);
};
return val::global("window")["Promise"].new_(js::bind(promiseCallback, std::placeholders::_1, std::placeholders::_2));
}
Original JS Code.
window.VMain = {};
window.VMain.Loaded = [];
window.VMain.LoadScript = function (scriptPath) {
if (window.VMain.Loaded[scriptPath]) {
return new this.Promise(function (resolve, reject) {
resolve();
});
}
return new Promise(function (resolve, reject) {
var script = document.createElement("script");
script.src = scriptPath;
script.type = "text/javascript";
window.VMain.Loaded[scriptPath] = true;
script.onload = function () {
resolve(scriptPath);
};
script.onerror = function () {
reject(scriptPath);
};
document["body"].appendChild(script);
});
};
Thanks for your help.
EXTRAS
Full error text
VModule.js:9 Uncaught BindingError {name: "BindingError", message: "function void0ArgsFunctor.opcall called with 1 arguments, expected 0 args!", stack: "BindingError: function void0ArgsFunctor.opcall cal…alhost:8082/VModule.js:9:95572), <anonymous>:5:1)"}
throwBindingError @ VModule.js:9
void0ArgsFunctor$opcall @ VM1906:5
load (asincrónico)
__emval_set_property @ VModule.js:9
(anónimo) @ VModule.wasm:1
ret.<computed> @ VModule.js:9
invoke_viii @ VModule.js:9
(anónimo) @ VModule.wasm:1
(anónimo) @ VModule.wasm:1
(anónimo) @ VModule.wasm:1
ret.<computed> @ VModule.js:9
invoke_viii @ VModule.js:9
(anónimo) @ VModule.wasm:1
(anónimo) @ VModule.wasm:1
ret.<computed> @ VModule.js:9
Module.dynCall_viiii @ VModule.js:9
dynCall_viiii_36 @ VM1759:4
void2ArgsFunctor$opcall @ VM1916:10
emval_allocator_1 @ VM1979:7
__emval_new @ VModule.js:9
(anónimo) @ VModule.wasm:1
ret.<computed> @ VModule.js:9
invoke_iiiii @ VModule.js:9
(anónimo) @ VModule.wasm:1
(anónimo) @ VModule.wasm:1
ret.<computed> @ VModule.js:9
invoke_vii @ VModule.js:9
(anónimo) @ VModule.wasm:1
(anónimo) @ VModule.wasm:1
(anónimo) @ VModule.wasm:1
ret.<computed> @ VModule.js:9
dynCall_iii_17 @ VM1744:4
Property @ VM1912:8
eval @ VM1976:3
_emscripten_run_script @ VModule.js:9
(anónimo) @ VModule.wasm:1
ret.<computed> @ VModule.js:9
Module._main @ VModule.js:9
callMain @ VModule.js:9
doRun @ VModule.js:9
run @ VModule.js:9
runCaller @ VModule.js:9
removeRunDependency @ VModule.js:9
receiveInstance @ VModule.js:9
receiveInstantiatedSource @ VModule.js:9
Promise.then (asincrónico)
(anónimo) @ VModule.js:9
Promise.then (asincrónico)
instantiateAsync @ VModule.js:9
createWasm @ VModule.js:9
(anónimo) @ VModule.js:9
(anónimo) @ Instance.js:1
Mostrar 14 fotogramas más del código de biblioteca
VModule.js:9 Uncaught BindingError {name: "BindingError", message: "function void0ArgsFunctor.opcall called with 1 arguments, expected 0 args!", stack: "BindingError: function void0ArgsFunctor.opcall cal…alhost:8082/VModule.js:9:95572), <anonymous>:5:1)"}message: "function void0ArgsFunctor.opcall called with 1 arguments, expected 0 args!"name: "BindingError"stack: "BindingError: function void0ArgsFunctor.opcall called with 1 arguments, expected 0 args!↵ at BindingError.<anonymous> (http://localhost:8082/VModule.js:9:75971)↵ at new BindingError (eval at createNamedFunction (http://localhost:8082/VModule.js:9:75680), <anonymous>:4:34)↵ at throwBindingError (http://localhost:8082/VModule.js:9:76412)↵ at void0ArgsFunctor$opcall [as opcall] (eval at new_ (http://localhost:8082/VModule.js:9:95572), <anonymous>:5:1)"__proto__: Errorconstructor: ƒ BindingError()arguments: (...)caller: (...)length: 0name: "BindingError"prototype: Error {constructor: ƒ, toString: ƒ}__proto__: ƒ ()[[FunctionLocation]]: VM1735:3[[Scopes]]: Scopes[2]toString: ƒ ()arguments: nullcaller: nulllength: 0name: ""prototype: {constructor: ƒ}__proto__: ƒ ()[[FunctionLocation]]: VModule.js:9[[Scopes]]: Scopes[4]__proto__: constructor: ƒ Error()message: ""name: "Error"toString: ƒ toString()arguments: (...)caller: (...)length: 0name: "toString"__proto__: ƒ ()[[Scopes]]: Scopes[0]__proto__: Object
throwBindingError @ VModule.js:9
void0ArgsFunctor$opcall @ VM1906:5
load (asincrónico)
__emval_set_property @ VModule.js:9
(anónimo) @ VModule.wasm:1
ret.<computed> @ VModule.js:9
invoke_viii @ VModule.js:9
(anónimo) @ VModule.wasm:1
(anónimo) @ VModule.wasm:1
(anónimo) @ VModule.wasm:1
ret.<computed> @ VModule.js:9
invoke_viii @ VModule.js:9
(anónimo) @ VModule.wasm:1
(anónimo) @ VModule.wasm:1
ret.<computed> @ VModule.js:9
Module.dynCall_viiii @ VModule.js:9
dynCall_viiii_36 @ VM1759:4
void2ArgsFunctor$opcall @ VM1916:10
emval_allocator_1 @ VM1979:7
__emval_new @ VModule.js:9
(anónimo) @ VModule.wasm:1
ret.<computed> @ VModule.js:9
invoke_iiiii @ VModule.js:9
(anónimo) @ VModule.wasm:1
(anónimo) @ VModule.wasm:1
ret.<computed> @ VModule.js:9
invoke_vii @ VModule.js:9
(anónimo) @ VModule.wasm:1
(anónimo) @ VModule.wasm:1
(anónimo) @ VModule.wasm:1
ret.<computed> @ VModule.js:9
dynCall_iii_17 @ VM1744:4
Property @ VM1912:8
eval @ VM1976:8
Promise.then (asincrónico)
eval @ VM1976:7
_emscripten_run_script @ VModule.js:9
(anónimo) @ VModule.wasm:1
ret.<computed> @ VModule.js:9
Module._main @ VModule.js:9
callMain @ VModule.js:9
doRun @ VModule.js:9
run @ VModule.js:9
runCaller @ VModule.js:9
removeRunDependency @ VModule.js:9
receiveInstance @ VModule.js:9
receiveInstantiatedSource @ VModule.js:9
Promise.then (asincrónico)
(anónimo) @ VModule.js:9
Promise.then (asincrónico)
instantiateAsync @ VModule.js:9
createWasm @ VModule.js:9
(anónimo) @ VModule.js:9
(anónimo) @ Instance.js:1
VModule.js:9 Uncaught BindingError {name: "BindingError", message: "function void0ArgsFunctor.opcall called with 1 arguments, expected 0 args!", stack: "BindingError: function void0ArgsFunctor.opcall cal…alhost:8082/VModule.js:9:95572), <anonymous>:5:1)"}
Memory management
What is the memory management approach of this library? Are the C++ callbacks freed? Can I free them explicitly? This is important because they might be holding onto e. g. heavyweight objects through capture.
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