src/postamble_minimal.js

/**
 * @license
 * Copyright 2019 The Emscripten Authors
 * SPDX-License-Identifier: MIT
 */

// === Auto-generated postamble setup entry stuff ===
{{{ exportRuntime() }}}

#if HAS_MAIN // Only if user is exporting a C main(), we will generate a run() function that can be used to launch main.
function run() {
#if MEMORYPROFILER
  emscriptenMemoryProfiler.onPreloadComplete();
#endif

  <<< ATMAINS >>>

#if PROXY_TO_PTHREAD
  // User requested the PROXY_TO_PTHREAD option, so call a stub main which
  // pthread_create()s a new thread that will call the user's real main() for
  // the application.
  var ret = __emscripten_proxy_main();
#else
  var ret = _main();

#if EXIT_RUNTIME
  callRuntimeCallbacks(__ATEXIT__);
  <<< ATEXITS >>>
#if PTHREADS
  PThread.terminateAllThreads();
#endif

#endif

#if EXIT_RUNTIME

#if ASSERTIONS
  runtimeExited = true;
#endif

  _proc_exit(ret);
#endif
#endif // PROXY_TO_PTHREAD

#if STACK_OVERFLOW_CHECK
  checkStackCookie();
#endif
}
#endif

function initRuntime(asm) {
#if ASSERTIONS || SAFE_HEAP || USE_ASAN
  runtimeInitialized = true;
#endif

#if PTHREADS
  if (ENVIRONMENT_IS_PTHREAD) {
    // Export needed variables that worker.js needs to Module.
    Module['HEAPU32'] = HEAPU32;
    Module['__emscripten_thread_init'] = __emscripten_thread_init;
    Module['__emscripten_thread_exit'] = __emscripten_thread_exit;
    Module['_pthread_self'] = _pthread_self;
    return;
  }
#endif

#if WASM_WORKERS
  if (ENVIRONMENT_IS_WASM_WORKER) return _wasmWorkerInitializeRuntime();
#endif

#if STACK_OVERFLOW_CHECK
  _emscripten_stack_init();
  writeStackCookie();
#if STACK_OVERFLOW_CHECK >= 2
  setStackLimits();
#endif
#endif

#if PTHREADS
  PThread.tlsInitFunctions.push(asm['_emscripten_tls_init']);
#endif

#if hasExportedSymbol('__wasm_call_ctors')
  asm['__wasm_call_ctors']();
#endif

  <<< ATINITS >>>
}

// Initialize wasm (asynchronous)

var imports = {
#if MINIFY_WASM_IMPORTED_MODULES
  'a': wasmImports,
#else // MINIFY_WASM_IMPORTED_MODULES
  'env': wasmImports,
  '{{{ WASI_MODULE_NAME }}}': wasmImports,
#endif // MINIFY_WASM_IMPORTED_MODULES
};

// In non-fastcomp non-asm.js builds, grab wasm exports to outer scope
// for emscripten_get_exported_function() to be able to access them.
#if LibraryManager.has('library_exports.js')
var asm;
#endif

#if PTHREADS
var wasmModule;
#endif

#if DECLARE_ASM_MODULE_EXPORTS
<<< WASM_MODULE_EXPORTS_DECLARES >>>
#endif

#if MINIMAL_RUNTIME_STREAMING_WASM_INSTANTIATION
// https://caniuse.com/#feat=wasm and https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/WebAssembly/instantiateStreaming
// Firefox 52 added Wasm support, but only Firefox 58 added instantiateStreaming.
// Chrome 57 added Wasm support, but only Chrome 61 added instantiateStreaming.
// Node.js and Safari do not support instantiateStreaming.
#if MIN_FIREFOX_VERSION < 58 || MIN_CHROME_VERSION < 61 || ENVIRONMENT_MAY_BE_NODE || MIN_SAFARI_VERSION != TARGET_NOT_SUPPORTED
#if ASSERTIONS && !WASM2JS
// Module['wasm'] should contain a typed array of the Wasm object data, or a
// precompiled WebAssembly Module.
if (!WebAssembly.instantiateStreaming && !Module['wasm']) throw 'Must load WebAssembly Module in to variable Module.wasm before adding compiled output .js script to the DOM';
#endif
(WebAssembly.instantiateStreaming
  ? WebAssembly.instantiateStreaming(fetch('{{{ TARGET_BASENAME }}}.wasm'), imports)
  : WebAssembly.instantiate(Module['wasm'], imports)).then((output) => {
#else
WebAssembly.instantiateStreaming(fetch('{{{ TARGET_BASENAME }}}.wasm'), imports).then((output) => {
#endif

#else // Non-streaming instantiation
#if ASSERTIONS && !WASM2JS
// Module['wasm'] should contain a typed array of the Wasm object data, or a
// precompiled WebAssembly Module.
if (!Module['wasm']) throw 'Must load WebAssembly Module in to variable Module.wasm before adding compiled output .js script to the DOM';
#endif

WebAssembly.instantiate(Module['wasm'], imports).then((output) => {
#endif

#if !LibraryManager.has('library_exports.js') && !EMBIND
  // If not using the emscripten_get_exported_function() API or embind, keep the
  // 'asm' exports variable in local scope to this instantiate function to save
  // code size.  (otherwise access it without to export it to outer scope)
  var
#endif
  // WebAssembly instantiation API gotcha: if Module['wasm'] above was a typed
  // array, then the output object will have an output.instance and
  // output.module objects. But if Module['wasm'] is an already compiled
  // WebAssembly module, then output is the WebAssembly instance itself.
  // Depending on the build mode, Module['wasm'] can mean a different thing.
#if MINIMAL_RUNTIME_STREAMING_WASM_COMPILATION || MINIMAL_RUNTIME_STREAMING_WASM_INSTANTIATION || PTHREADS
  // https://caniuse.com/#feat=wasm and https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/WebAssembly/instantiateStreaming
  // Firefox 52 added Wasm support, but only Firefox 58 added compileStreaming &
  // instantiateStreaming.
  // Chrome 57 added Wasm support, but only Chrome 61 added compileStreaming &
  // instantiateStreaming.
  // Node.js and Safari do not support compileStreaming or instantiateStreaming.
#if MIN_FIREFOX_VERSION < 58 || MIN_CHROME_VERSION < 61 || ENVIRONMENT_MAY_BE_NODE || MIN_SAFARI_VERSION != TARGET_NOT_SUPPORTED || PTHREADS
  // In pthreads, Module['wasm'] is an already compiled WebAssembly.Module. In
  // that case, 'output' is a WebAssembly.Instance.
  // In main thread, Module['wasm'] is either a typed array or a fetch stream.
  // In that case, 'output.instance' is the WebAssembly.Instance.
  asm = (output.instance || output).exports;
#else
  asm = output.exports;
#endif
#else
  asm = output.instance.exports;
#endif

#if MEMORY64
  asm = instrumentWasmExportsForMemory64(asm);
#endif

#if USE_OFFSET_CONVERTER
#if PTHREADS
  if (!ENVIRONMENT_IS_PTHREAD)
#endif
    wasmOffsetConverter = new WasmOffsetConverter(Module['wasm'], output.module);
#endif

#if !DECLARE_ASM_MODULE_EXPORTS
  exportAsmFunctions(asm);
#else
  <<< WASM_MODULE_EXPORTS >>>
#endif
  wasmTable = asm['__indirect_function_table'];
#if ASSERTIONS
  assert(wasmTable);
#endif

#if AUDIO_WORKLET
  // If we are in the audio worklet environment, we can only access the Module object
  // and not the global scope of the main JS script. Therefore we need to export
  // all functions that the audio worklet scope needs onto the Module object.
  Module['wasmTable'] = wasmTable;
#if ASSERTIONS
  // In ASSERTIONS-enabled builds, the following symbols have gotten read-only getters
  // saved to the Module. Remove those getters so we can manually export the stack
  // functions here.
  delete Module['stackSave'];
  delete Module['stackAlloc'];
  delete Module['stackRestore'];
#endif
  Module['stackSave'] = stackSave;
  Module['stackAlloc'] = stackAlloc;
  Module['stackRestore'] = stackRestore;
#endif

#if !IMPORTED_MEMORY
  wasmMemory = asm['memory'];
#if ASSERTIONS
  assert(wasmMemory);
  assert(wasmMemory.buffer.byteLength === {{{ INITIAL_MEMORY }}});
#endif
  updateMemoryViews();
#endif

#if !MEM_INIT_IN_WASM && !SINGLE_FILE
#if ASSERTIONS
  if (!Module['mem']) throw 'Must load memory initializer as an ArrayBuffer in to variable Module.mem before adding compiled output .js script to the DOM';
#endif
  HEAPU8.set(new Uint8Array(Module['mem']), {{{ GLOBAL_BASE }}});
#endif

  initRuntime(asm);
#if PTHREADS
  // Export Wasm module for pthread creation to access.
  wasmModule = output.module || Module['wasm'];
  PThread.loadWasmModuleToAllWorkers(ready);
#else
  ready();
#endif
}

#if ASSERTIONS || WASM == 2
, (error) => {
#if ASSERTIONS
  console.error(error);
#endif

#if WASM == 2
#if ENVIRONMENT_MAY_BE_NODE || ENVIRONMENT_MAY_BE_SHELL
  if (typeof location != 'undefined') {
#endif
    // WebAssembly compilation failed, try running the JS fallback instead.
    var search = location.search;
    if (search.indexOf('_rwasm=0') < 0) {
      location.href += (search ? search + '&' : '?') + '_rwasm=0';
    }
#if ENVIRONMENT_MAY_BE_NODE || ENVIRONMENT_MAY_BE_SHELL
  }
#endif
#endif // WASM == 2
}
#endif // ASSERTIONS || WASM == 2
);