emscripten/src/embind/emval.js at universal-python · JavaScriptIOT/emscripten · GitHub

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/*global Module:true, Runtime*/

/*global HEAP32*/

/*global new_*/

/*global createNamedFunction*/

/*global readLatin1String, writeStringToMemory*/

/*global requireRegisteredType, throwBindingError, runDestructors*/

/*jslint sub:true*/ /* The symbols 'fromWireType' and 'toWireType' must be accessed via array notation to be closure-safe since craftInvokerFunction crafts functions as strings that can't be closured. */

// -- jshint doesn't understand library syntax, so we need to mark the symbols exposed here

/*global getStringOrSymbol, emval_handle_array, __emval_register, __emval_unregister, requireHandle, count_emval_handles, emval_symbols, emval_free_list, get_first_emval, __emval_decref, emval_newers*/

/*global craftEmvalAllocator, __emval_addMethodCaller, emval_methodCallers, LibraryManager, mergeInto, __emval_allocateDestructors, global, __emval_lookupTypes, makeLegalFunctionName*/

/*global emval_get_global*/

var LibraryEmVal = {

$emval_handle_array: [{},

{value: undefined},{value: null},

{value: true},{value: false}], // reserve zero and special values

$emval_free_list: [],

$emval_symbols: {}, // address -> string

$init_emval__deps: ['$count_emval_handles', '$get_first_emval'],

$init_emval__postset: 'init_emval();',

$init_emval: function() {

Module['count_emval_handles'] = count_emval_handles;

Module['get_first_emval'] = get_first_emval;

$count_emval_handles__deps: ['$emval_handle_array'],

$count_emval_handles: function() {

var count = 0;

for (var i = 5; i < emval_handle_array.length; ++i) {

if (emval_handle_array[i] !== undefined) {

++count;

}

return count;

$get_first_emval__deps: ['$emval_handle_array'],

$get_first_emval: function() {

for (var i = 5; i < emval_handle_array.length; ++i) {

if (emval_handle_array[i] !== undefined) {

return emval_handle_array[i];

}

return null;

_emval_register_symbol__deps: ['$emval_symbols', '$readLatin1String'],

_emval_register_symbol: function(address) {

emval_symbols[address] = readLatin1String(address);

$getStringOrSymbol__deps: ['$emval_symbols', '$readLatin1String'],

$getStringOrSymbol: function(address) {

var symbol = emval_symbols[address];

if (symbol === undefined) {

return readLatin1String(address);

} else {

return symbol;

}

$requireHandle__deps: ['$emval_handle_array', '$throwBindingError'],

$requireHandle: function(handle) {

if (!handle) {

throwBindingError('Cannot use deleted val. handle = ' + handle);

}

return emval_handle_array[handle].value;

_emval_register__deps: ['$emval_free_list', '$emval_handle_array', '$init_emval'],

_emval_register: function(value) {

switch(value){

case undefined :{ return 1; }

case null :{ return 2; }

case true :{ return 3; }

case false :{ return 4; }

default:{

var handle = emval_free_list.length ?

emval_free_list.pop() :

emval_handle_array.length;

emval_handle_array[handle] = {refcount: 1, value: value};

return handle;

}

_emval_incref__deps: ['$emval_handle_array'],

_emval_incref: function(handle) {

if (handle > 4) {

emval_handle_array[handle].refcount += 1;

}

_emval_decref__deps: ['$emval_free_list', '$emval_handle_array'],

_emval_decref: function(handle) {

if (handle > 4 && 0 === --emval_handle_array[handle].refcount) {

emval_handle_array[handle] = undefined;

emval_free_list.push(handle);

}

_emval_run_destructors__deps: ['_emval_decref', '$emval_handle_array', '$runDestructors'],

_emval_run_destructors: function(handle) {

var destructors = emval_handle_array[handle].value;

runDestructors(destructors);

__emval_decref(handle);

_emval_new_array__deps: ['_emval_register'],

_emval_new_array: function() {

return __emval_register([]);

_emval_new_object__deps: ['_emval_register'],

_emval_new_object: function() {

return __emval_register({});

_emval_new_cstring__deps: ['$getStringOrSymbol', '_emval_register'],

_emval_new_cstring: function(v) {

return __emval_register(getStringOrSymbol(v));

_emval_take_value__deps: ['_emval_register', '$requireRegisteredType'],

_emval_take_value: function(type, argv) {

type = requireRegisteredType(type, '_emval_take_value');

var v = type['readValueFromPointer'](argv);

return __emval_register(v);

$emval_newers: {}, // arity -> function

$craftEmvalAllocator__deps: ['_emval_register', '$requireRegisteredType'],

$craftEmvalAllocator: function(argCount) {

/*This function returns a new function that looks like this:

function emval_allocator_3(constructor, argTypes, args) {

var argType0 = requireRegisteredType(HEAP32[(argTypes >> 2)], "parameter 0");

var arg0 = argType0.readValueFromPointer(args);

var argType1 = requireRegisteredType(HEAP32[(argTypes >> 2) + 1], "parameter 1");

var arg1 = argType1.readValueFromPointer(args + 8);

var argType2 = requireRegisteredType(HEAP32[(argTypes >> 2) + 2], "parameter 2");

var arg2 = argType2.readValueFromPointer(args + 16);

var obj = new constructor(arg0, arg1, arg2);

return __emval_register(obj);

} */

var argsList = "";

for(var i = 0; i < argCount; ++i) {

argsList += (i!==0?", ":"")+"arg"+i; // 'arg0, arg1, ..., argn'

}

var functionBody =

"return function emval_allocator_"+argCount+"(constructor, argTypes, args) {\n";

for(var i = 0; i < argCount; ++i) {

functionBody +=

"var argType"+i+" = requireRegisteredType(HEAP32[(argTypes >> 2) + "+i+"], \"parameter "+i+"\");\n" +

"var arg"+i+" = argType"+i+".readValueFromPointer(args);\n" +

"args += argType"+i+"['argPackAdvance'];\n";

}

functionBody +=

"var obj = new constructor("+argsList+");\n" +

"return __emval_register(obj);\n" +

"}\n";

/*jshint evil:true*/

return (new Function("requireRegisteredType", "HEAP32", "__emval_register", functionBody))(

requireRegisteredType, HEAP32, __emval_register);

_emval_new__deps: ['$craftEmvalAllocator', '$emval_newers', '$requireHandle'],

_emval_new: function(handle, argCount, argTypes, args) {

handle = requireHandle(handle);

var newer = emval_newers[argCount];

if (!newer) {

newer = craftEmvalAllocator(argCount);

emval_newers[argCount] = newer;

}

return newer(handle, argTypes, args);

// appease jshint (technically this code uses eval)

$emval_get_global: function() { return (function(){return Function;})()('return this')(); },

_emval_get_global__deps: ['_emval_register', '$getStringOrSymbol', '$emval_get_global'],

_emval_get_global: function(name) {

if(name===0){

return __emval_register(emval_get_global());

} else {

name = getStringOrSymbol(name);

return __emval_register(emval_get_global()[name]);

}

_emval_get_module_property__deps: ['$getStringOrSymbol', '_emval_register'],

_emval_get_module_property: function(name) {

name = getStringOrSymbol(name);

return __emval_register(Module[name]);

_emval_get_property__deps: ['_emval_register', '$requireHandle'],

_emval_get_property: function(handle, key) {

handle = requireHandle(handle);

key = requireHandle(key);

return __emval_register(handle[key]);

_emval_set_property__deps: ['$requireHandle'],

_emval_set_property: function(handle, key, value) {

handle = requireHandle(handle);

key = requireHandle(key);

value = requireHandle(value);

handle[key] = value;

_emval_as__deps: ['_emval_register', '$requireHandle', '$requireRegisteredType'],

_emval_as: function(handle, returnType, destructorsRef) {

handle = requireHandle(handle);

returnType = requireRegisteredType(returnType, 'emval::as');

var destructors = [];

var rd = __emval_register(destructors);

HEAP32[destructorsRef >> 2] = rd;

return returnType['toWireType'](destructors, handle);

_emval_equals__deps: ['_emval_register', '$requireHandle'],

_emval_equals: function(first, second ){

first = requireHandle(first);

second = requireHandle(second);

return first==second;

_emval_strictly_equals__deps: ['_emval_register', '$requireHandle'],

_emval_strictly_equals: function(first, second ){

first = requireHandle(first);

second = requireHandle(second);

return first===second;

_emval_call__deps: ['_emval_lookupTypes', '_emval_register', '$requireHandle'],

_emval_call: function(handle, argCount, argTypes, argv) {

handle = requireHandle(handle);

var types = __emval_lookupTypes(argCount, argTypes);

var args = new Array(argCount);

for (var i = 0; i < argCount; ++i) {

var type = types[i];

args[i] = type['readValueFromPointer'](argv);

argv += type['argPackAdvance'];

}

var rv = handle.apply(undefined, args);

return __emval_register(rv);

_emval_lookupTypes__deps: ['$requireRegisteredType'],

_emval_lookupTypes: function(argCount, argTypes, argWireTypes) {

var a = new Array(argCount);

for (var i = 0; i < argCount; ++i) {

a[i] = requireRegisteredType(

HEAP32[(argTypes >> 2) + i],

"parameter " + i);

}

return a;

_emval_allocateDestructors__deps: ['_emval_register'],

_emval_allocateDestructors: function(destructorsRef) {

var destructors = [];

HEAP32[destructorsRef >> 2] = __emval_register(destructors);

return destructors;

// Leave id 0 undefined. It's not a big deal, but might be confusing

// to have null be a valid method caller.

$emval_methodCallers: [undefined],

_emval_addMethodCaller__deps: ['$emval_methodCallers'],

_emval_addMethodCaller: function(caller) {

var id = emval_methodCallers.length;

emval_methodCallers.push(caller);

return id;

_emval_get_method_caller__deps: ['_emval_addMethodCaller', '_emval_lookupTypes', '$new_', '$makeLegalFunctionName'],

_emval_get_method_caller: function(argCount, argTypes) {

var types = __emval_lookupTypes(argCount, argTypes);

var retType = types[0];

var signatureName = retType.name + "_$" + types.slice(1).map(function (t) { return t.name; }).join("_") + "$";

var params = ["retType"];

var args = [retType];

var argsList = ""; // 'arg0, arg1, arg2, ... , argN'

for (var i = 0; i < argCount - 1; ++i) {

argsList += (i !== 0 ? ", " : "") + "arg" + i;

params.push("argType" + i);

args.push(types[1 + i]);

}

var functionName = makeLegalFunctionName("methodCaller_" + signatureName);

var functionBody =

"return function " + functionName + "(handle, name, destructors, args) {\n";

var offset = 0;

for (var i = 0; i < argCount - 1; ++i) {

functionBody +=

" var arg" + i + " = argType" + i + ".readValueFromPointer(args" + (offset ? ("+"+offset) : "") + ");\n";

offset += types[i + 1]['argPackAdvance'];

}

functionBody +=

" var rv = handle[name](" + argsList + ");\n";

for (var i = 0; i < argCount - 1; ++i) {

if (types[i + 1]['deleteObject']) {

functionBody +=

" argType" + i + ".deleteObject(arg" + i + ");\n";

}

if (!retType.isVoid) {

functionBody +=

" return retType.toWireType(destructors, rv);\n";

}

functionBody +=

"};\n";

params.push(functionBody);

var invokerFunction = new_(Function, params).apply(null, args);

return __emval_addMethodCaller(invokerFunction);

_emval_call_method__deps: ['_emval_allocateDestructors', '$getStringOrSymbol', '$emval_methodCallers', '$requireHandle'],

_emval_call_method: function(caller, handle, methodName, destructorsRef, args) {

caller = emval_methodCallers[caller];

handle = requireHandle(handle);

methodName = getStringOrSymbol(methodName);

return caller(handle, methodName, __emval_allocateDestructors(destructorsRef), args);

_emval_call_void_method__deps: ['_emval_allocateDestructors', '$getStringOrSymbol', '$emval_methodCallers', '$requireHandle'],

_emval_call_void_method: function(caller, handle, methodName, args) {

caller = emval_methodCallers[caller];

handle = requireHandle(handle);

methodName = getStringOrSymbol(methodName);

caller(handle, methodName, null, args);

_emval_typeof__deps: ['_emval_register', '$requireHandle'],

_emval_typeof: function(handle) {

handle = requireHandle(handle);

return __emval_register(typeof handle);

};

mergeInto(LibraryManager.library, LibraryEmVal);

emscripten/src/embind/emval.js at universal-python · JavaScriptIOT/emscripten · GitHub

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