forked from swiftwasm/JavaScriptKit
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathindex.js
More file actions
438 lines (428 loc) · 19.5 KB
/
index.js
File metadata and controls
438 lines (428 loc) · 19.5 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
(function (global, factory) {
typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
typeof define === 'function' && define.amd ? define(['exports'], factory) :
(global = typeof globalThis !== 'undefined' ? globalThis : global || self, factory(global.JavaScriptKit = {}));
})(this, (function (exports) { 'use strict';
/// Memory lifetime of closures in Swift are managed by Swift side
class SwiftClosureDeallocator {
constructor(exports) {
if (typeof FinalizationRegistry === "undefined") {
throw new Error("The Swift part of JavaScriptKit was configured to require " +
"the availability of JavaScript WeakRefs. Please build " +
"with `-Xswiftc -DJAVASCRIPTKIT_WITHOUT_WEAKREFS` to " +
"disable features that use WeakRefs.");
}
this.functionRegistry = new FinalizationRegistry((id) => {
exports.swjs_free_host_function(id);
});
}
track(func, func_ref) {
this.functionRegistry.register(func, func_ref);
}
}
function assertNever(x, message) {
throw new Error(message);
}
const decode = (kind, payload1, payload2, memory) => {
switch (kind) {
case 0 /* Boolean */:
switch (payload1) {
case 0:
return false;
case 1:
return true;
}
case 2 /* Number */:
return payload2;
case 1 /* String */:
case 3 /* Object */:
case 6 /* Function */:
case 7 /* Symbol */:
case 8 /* BigInt */:
return memory.getObject(payload1);
case 4 /* Null */:
return null;
case 5 /* Undefined */:
return undefined;
default:
assertNever(kind, `JSValue Type kind "${kind}" is not supported`);
}
};
// Note:
// `decodeValues` assumes that the size of RawJSValue is 16.
const decodeArray = (ptr, length, memory) => {
// fast path for empty array
if (length === 0) {
return [];
}
let result = [];
// It's safe to hold DataView here because WebAssembly.Memory.buffer won't
// change within this function.
const view = memory.dataView();
for (let index = 0; index < length; index++) {
const base = ptr + 16 * index;
const kind = view.getUint32(base, true);
const payload1 = view.getUint32(base + 4, true);
const payload2 = view.getFloat64(base + 8, true);
result.push(decode(kind, payload1, payload2, memory));
}
return result;
};
// A helper function to encode a RawJSValue into a pointers.
// Please prefer to use `writeAndReturnKindBits` to avoid unnecessary
// memory stores.
// This function should be used only when kind flag is stored in memory.
const write = (value, kind_ptr, payload1_ptr, payload2_ptr, is_exception, memory) => {
const kind = writeAndReturnKindBits(value, payload1_ptr, payload2_ptr, is_exception, memory);
memory.writeUint32(kind_ptr, kind);
};
const writeAndReturnKindBits = (value, payload1_ptr, payload2_ptr, is_exception, memory) => {
const exceptionBit = (is_exception ? 1 : 0) << 31;
if (value === null) {
return exceptionBit | 4 /* Null */;
}
const writeRef = (kind) => {
memory.writeUint32(payload1_ptr, memory.retain(value));
return exceptionBit | kind;
};
const type = typeof value;
switch (type) {
case "boolean": {
memory.writeUint32(payload1_ptr, value ? 1 : 0);
return exceptionBit | 0 /* Boolean */;
}
case "number": {
memory.writeFloat64(payload2_ptr, value);
return exceptionBit | 2 /* Number */;
}
case "string": {
return writeRef(1 /* String */);
}
case "undefined": {
return exceptionBit | 5 /* Undefined */;
}
case "object": {
return writeRef(3 /* Object */);
}
case "function": {
return writeRef(6 /* Function */);
}
case "symbol": {
return writeRef(7 /* Symbol */);
}
case "bigint": {
return writeRef(8 /* BigInt */);
}
default:
assertNever(type, `Type "${type}" is not supported yet`);
}
throw new Error("Unreachable");
};
let globalVariable;
if (typeof globalThis !== "undefined") {
globalVariable = globalThis;
}
else if (typeof window !== "undefined") {
globalVariable = window;
}
else if (typeof global !== "undefined") {
globalVariable = global;
}
else if (typeof self !== "undefined") {
globalVariable = self;
}
class SwiftRuntimeHeap {
constructor() {
this._heapValueById = new Map();
this._heapValueById.set(0, globalVariable);
this._heapEntryByValue = new Map();
this._heapEntryByValue.set(globalVariable, { id: 0, rc: 1 });
// Note: 0 is preserved for global
this._heapNextKey = 1;
}
retain(value) {
const entry = this._heapEntryByValue.get(value);
if (entry) {
entry.rc++;
return entry.id;
}
const id = this._heapNextKey++;
this._heapValueById.set(id, value);
this._heapEntryByValue.set(value, { id: id, rc: 1 });
return id;
}
release(ref) {
const value = this._heapValueById.get(ref);
const entry = this._heapEntryByValue.get(value);
entry.rc--;
if (entry.rc != 0)
return;
this._heapEntryByValue.delete(value);
this._heapValueById.delete(ref);
}
referenceHeap(ref) {
const value = this._heapValueById.get(ref);
if (value === undefined) {
throw new ReferenceError("Attempted to read invalid reference " + ref);
}
return value;
}
}
class Memory {
constructor(exports) {
this.heap = new SwiftRuntimeHeap();
this.retain = (value) => this.heap.retain(value);
this.getObject = (ref) => this.heap.referenceHeap(ref);
this.release = (ref) => this.heap.release(ref);
this.bytes = () => new Uint8Array(this.rawMemory.buffer);
this.dataView = () => new DataView(this.rawMemory.buffer);
this.writeBytes = (ptr, bytes) => this.bytes().set(bytes, ptr);
this.readUint32 = (ptr) => this.dataView().getUint32(ptr, true);
this.readUint64 = (ptr) => this.dataView().getBigUint64(ptr, true);
this.readInt64 = (ptr) => this.dataView().getBigInt64(ptr, true);
this.readFloat64 = (ptr) => this.dataView().getFloat64(ptr, true);
this.writeUint32 = (ptr, value) => this.dataView().setUint32(ptr, value, true);
this.writeUint64 = (ptr, value) => this.dataView().setBigUint64(ptr, value, true);
this.writeInt64 = (ptr, value) => this.dataView().setBigInt64(ptr, value, true);
this.writeFloat64 = (ptr, value) => this.dataView().setFloat64(ptr, value, true);
this.rawMemory = exports.memory;
}
}
class SwiftRuntime {
constructor() {
this.version = 708;
this.textDecoder = new TextDecoder("utf-8");
this.textEncoder = new TextEncoder(); // Only support utf-8
/** @deprecated Use `wasmImports` instead */
this.importObjects = () => this.wasmImports;
this.wasmImports = {
swjs_set_prop: (ref, name, kind, payload1, payload2) => {
const memory = this.memory;
const obj = memory.getObject(ref);
const key = memory.getObject(name);
const value = decode(kind, payload1, payload2, memory);
obj[key] = value;
},
swjs_get_prop: (ref, name, payload1_ptr, payload2_ptr) => {
const memory = this.memory;
const obj = memory.getObject(ref);
const key = memory.getObject(name);
const result = obj[key];
return writeAndReturnKindBits(result, payload1_ptr, payload2_ptr, false, memory);
},
swjs_set_subscript: (ref, index, kind, payload1, payload2) => {
const memory = this.memory;
const obj = memory.getObject(ref);
const value = decode(kind, payload1, payload2, memory);
obj[index] = value;
},
swjs_get_subscript: (ref, index, payload1_ptr, payload2_ptr) => {
const obj = this.memory.getObject(ref);
const result = obj[index];
return writeAndReturnKindBits(result, payload1_ptr, payload2_ptr, false, this.memory);
},
swjs_encode_string: (ref, bytes_ptr_result) => {
const memory = this.memory;
const bytes = this.textEncoder.encode(memory.getObject(ref));
const bytes_ptr = memory.retain(bytes);
memory.writeUint32(bytes_ptr_result, bytes_ptr);
return bytes.length;
},
swjs_decode_string: (bytes_ptr, length) => {
const memory = this.memory;
const bytes = memory
.bytes()
.subarray(bytes_ptr, bytes_ptr + length);
const string = this.textDecoder.decode(bytes);
return memory.retain(string);
},
swjs_load_string: (ref, buffer) => {
const memory = this.memory;
const bytes = memory.getObject(ref);
memory.writeBytes(buffer, bytes);
},
swjs_call_function: (ref, argv, argc, payload1_ptr, payload2_ptr) => {
const memory = this.memory;
const func = memory.getObject(ref);
let result = undefined;
try {
const args = decodeArray(argv, argc, memory);
result = func(...args);
}
catch (error) {
return writeAndReturnKindBits(error, payload1_ptr, payload2_ptr, true, this.memory);
}
return writeAndReturnKindBits(result, payload1_ptr, payload2_ptr, false, this.memory);
},
swjs_call_function_no_catch: (ref, argv, argc, payload1_ptr, payload2_ptr) => {
const memory = this.memory;
const func = memory.getObject(ref);
const args = decodeArray(argv, argc, memory);
const result = func(...args);
return writeAndReturnKindBits(result, payload1_ptr, payload2_ptr, false, this.memory);
},
swjs_call_function_with_this: (obj_ref, func_ref, argv, argc, payload1_ptr, payload2_ptr) => {
const memory = this.memory;
const obj = memory.getObject(obj_ref);
const func = memory.getObject(func_ref);
let result;
try {
const args = decodeArray(argv, argc, memory);
result = func.apply(obj, args);
}
catch (error) {
return writeAndReturnKindBits(error, payload1_ptr, payload2_ptr, true, this.memory);
}
return writeAndReturnKindBits(result, payload1_ptr, payload2_ptr, false, this.memory);
},
swjs_call_function_with_this_no_catch: (obj_ref, func_ref, argv, argc, payload1_ptr, payload2_ptr) => {
const memory = this.memory;
const obj = memory.getObject(obj_ref);
const func = memory.getObject(func_ref);
let result = undefined;
const args = decodeArray(argv, argc, memory);
result = func.apply(obj, args);
return writeAndReturnKindBits(result, payload1_ptr, payload2_ptr, false, this.memory);
},
swjs_call_new: (ref, argv, argc) => {
const memory = this.memory;
const constructor = memory.getObject(ref);
const args = decodeArray(argv, argc, memory);
const instance = new constructor(...args);
return this.memory.retain(instance);
},
swjs_call_throwing_new: (ref, argv, argc, exception_kind_ptr, exception_payload1_ptr, exception_payload2_ptr) => {
let memory = this.memory;
const constructor = memory.getObject(ref);
let result;
try {
const args = decodeArray(argv, argc, memory);
result = new constructor(...args);
}
catch (error) {
write(error, exception_kind_ptr, exception_payload1_ptr, exception_payload2_ptr, true, this.memory);
return -1;
}
memory = this.memory;
write(null, exception_kind_ptr, exception_payload1_ptr, exception_payload2_ptr, false, memory);
return memory.retain(result);
},
swjs_instanceof: (obj_ref, constructor_ref) => {
const memory = this.memory;
const obj = memory.getObject(obj_ref);
const constructor = memory.getObject(constructor_ref);
return obj instanceof constructor;
},
swjs_create_function: (host_func_id, line, file) => {
var _a;
const fileString = this.memory.getObject(file);
const func = (...args) => this.callHostFunction(host_func_id, line, fileString, args);
const func_ref = this.memory.retain(func);
(_a = this.closureDeallocator) === null || _a === void 0 ? void 0 : _a.track(func, func_ref);
return func_ref;
},
swjs_create_typed_array: (constructor_ref, elementsPtr, length) => {
const ArrayType = this.memory.getObject(constructor_ref);
const array = new ArrayType(this.memory.rawMemory.buffer, elementsPtr, length);
// Call `.slice()` to copy the memory
return this.memory.retain(array.slice());
},
swjs_load_typed_array: (ref, buffer) => {
const memory = this.memory;
const typedArray = memory.getObject(ref);
const bytes = new Uint8Array(typedArray.buffer);
memory.writeBytes(buffer, bytes);
},
swjs_release: (ref) => {
this.memory.release(ref);
},
swjs_i64_to_bigint: (value, signed) => {
return this.memory.retain(signed ? value : BigInt.asUintN(64, value));
},
swjs_bigint_to_i64: (ref, signed) => {
const object = this.memory.getObject(ref);
if (typeof object !== "bigint") {
throw new Error(`Expected a BigInt, but got ${typeof object}`);
}
if (signed) {
return object;
}
else {
if (object < BigInt(0)) {
return BigInt(0);
}
return BigInt.asIntN(64, object);
}
},
swjs_i64_to_bigint_slow: (lower, upper, signed) => {
const value = BigInt.asUintN(32, BigInt(lower)) +
(BigInt.asUintN(32, BigInt(upper)) << BigInt(32));
return this.memory.retain(signed ? BigInt.asIntN(64, value) : BigInt.asUintN(64, value));
},
};
this._instance = null;
this._memory = null;
this._closureDeallocator = null;
}
setInstance(instance) {
this._instance = instance;
if (typeof this.exports._start === "function") {
throw new Error(`JavaScriptKit supports only WASI reactor ABI.
Please make sure you are building with:
-Xswiftc -Xclang-linker -Xswiftc -mexec-model=reactor
`);
}
if (this.exports.swjs_library_version() != this.version) {
throw new Error(`The versions of JavaScriptKit are incompatible.
WebAssembly runtime ${this.exports.swjs_library_version()} != JS runtime ${this.version}`);
}
}
get instance() {
if (!this._instance)
throw new Error("WebAssembly instance is not set yet");
return this._instance;
}
get exports() {
return this.instance.exports;
}
get memory() {
if (!this._memory) {
this._memory = new Memory(this.instance.exports);
}
return this._memory;
}
get closureDeallocator() {
if (this._closureDeallocator)
return this._closureDeallocator;
const features = this.exports.swjs_library_features();
const librarySupportsWeakRef = (features & 1 /* WeakRefs */) != 0;
if (librarySupportsWeakRef) {
this._closureDeallocator = new SwiftClosureDeallocator(this.exports);
}
return this._closureDeallocator;
}
callHostFunction(host_func_id, line, file, args) {
const argc = args.length;
const argv = this.exports.swjs_prepare_host_function_call(argc);
const memory = this.memory;
for (let index = 0; index < args.length; index++) {
const argument = args[index];
const base = argv + 16 * index;
write(argument, base, base + 4, base + 8, false, memory);
}
let output;
// This ref is released by the swjs_call_host_function implementation
const callback_func_ref = memory.retain((result) => {
output = result;
});
const alreadyReleased = this.exports.swjs_call_host_function(host_func_id, argv, argc, callback_func_ref);
if (alreadyReleased) {
throw new Error(`The JSClosure has been already released by Swift side. The closure is created at ${file}:${line}`);
}
this.exports.swjs_cleanup_host_function_call(argv);
return output;
}
}
exports.SwiftRuntime = SwiftRuntime;
Object.defineProperty(exports, '__esModule', { value: true });
}));