diff --git a/libr3.worker.js b/libr3.worker.js deleted file mode 100644 index 8041df4..0000000 --- a/libr3.worker.js +++ /dev/null @@ -1,196 +0,0 @@ -// Copyright 2015 The Emscripten Authors. All rights reserved. -// Emscripten is available under two separate licenses, the MIT license and the -// University of Illinois/NCSA Open Source License. Both these licenses can be -// found in the LICENSE file. - -// Pthread Web Worker startup routine: -// This is the entry point file that is loaded first by each Web Worker -// that executes pthreads on the Emscripten application. - -// Thread-local: -var threadInfoStruct = 0; // Info area for this thread in Emscripten HEAP (shared). If zero, this worker is not currently hosting an executing pthread. -var selfThreadId = 0; // The ID of this thread. 0 if not hosting a pthread. -var parentThreadId = 0; // The ID of the parent pthread that launched this thread. -var tempDoublePtr = 0; // A temporary memory area for global float and double marshalling operations. - -// Thread-local: Each thread has its own allocated stack space. -var STACK_BASE = 0; -var STACKTOP = 0; -var STACK_MAX = 0; - -// These are system-wide memory area parameters that are set at main runtime startup in main thread, and stay constant throughout the application. -var buffer; // All pthreads share the same Emscripten HEAP as SharedArrayBuffer with the main execution thread. -var DYNAMICTOP_PTR = 0; -var TOTAL_MEMORY = 0; -var DYNAMIC_BASE = 0; - -var ENVIRONMENT_IS_PTHREAD = true; -var PthreadWorkerInit = {}; - -// performance.now() is specced to return a wallclock time in msecs since that Web Worker/main thread launched. However for pthreads this can cause -// subtle problems in emscripten_get_now() as this essentially would measure time from pthread_create(), meaning that the clocks between each threads -// would be wildly out of sync. Therefore sync all pthreads to the clock on the main browser thread, so that different threads see a somewhat -// coherent clock across each of them (+/- 0.1msecs in testing) -var __performance_now_clock_drift = 0; - -// Cannot use console.log or console.error in a web worker, since that would risk a browser deadlock! https://bugzilla.mozilla.org/show_bug.cgi?id=1049091 -// Therefore implement custom logging facility for threads running in a worker, which queue the messages to main thread to print. -var Module = {}; - -function assert(condition, text) { - if (!condition) abort('Assertion failed: ' + text); -} - -// When error objects propagate from Web Worker to main thread, they lose helpful call stack and thread ID information, so print out errors early here, -// before that happens. -this.addEventListener('error', function(e) { - if (e.message.indexOf('SimulateInfiniteLoop') != -1) return e.preventDefault(); - - var errorSource = ' in ' + e.filename + ':' + e.lineno + ':' + e.colno; - console.error('Pthread ' + selfThreadId + ' uncaught exception' + (e.filename || e.lineno || e.colno ? errorSource : "") + ': ' + e.message + '. Error object:'); - console.error(e.error); -}); - -function threadPrint() { - var text = Array.prototype.slice.call(arguments).join(' '); - console.log(text); -} -function threadPrintErr() { - var text = Array.prototype.slice.call(arguments).join(' '); - console.error(text); - console.error(new Error().stack); -} -function threadAlert() { - var text = Array.prototype.slice.call(arguments).join(' '); - postMessage({cmd: 'alert', text: text, threadId: selfThreadId}); -} -out = threadPrint; -err = threadPrintErr; -this.alert = threadAlert; - -Module['instantiateWasm'] = function(info, receiveInstance) { - // Instantiate from the module posted from the main thread. - // We can just use sync instantiation in the worker. - instance = new WebAssembly.Instance(wasmModule, info); - // We don't need the module anymore; new threads will be spawned from the main thread. - wasmModule = null; - receiveInstance(instance); // The second 'module' parameter is intentionally null here, we don't need to keep a ref to the Module object from here. - return instance.exports; -} - -var wasmModule; -var wasmMemory; - -this.onmessage = function(e) { - try { - if (e.data.cmd === 'load') { // Preload command that is called once per worker to parse and load the Emscripten code. - // Initialize the thread-local field(s): - tempDoublePtr = e.data.tempDoublePtr; - - // Initialize the global "process"-wide fields: - TOTAL_MEMORY = e.data.TOTAL_MEMORY; - DYNAMIC_BASE = e.data.DYNAMIC_BASE; - DYNAMICTOP_PTR = e.data.DYNAMICTOP_PTR; - - // The Wasm module will have import fields for STACKTOP and STACK_MAX. At 'load' stage of Worker startup, we are just - // spawning this Web Worker to act as a host for future created pthreads, i.e. we do not have a pthread to start up here yet. - // (A single Worker can also host multiple pthreads throughout its lifetime, shutting down a pthread will not shut down its hosting Worker, - // but the Worker is reused for later spawned pthreads). The 'run' stage below will actually start running a pthread. - // The stack space for a pthread is allocated and deallocated when a pthread is actually run, not yet at Worker 'load' stage. - // However, the WebAssembly module we are loading up here has import fields for STACKTOP and STACK_MAX, which it needs to get filled in - // immediately at Wasm Module instantiation time. The values of these will not get used until pthread is actually running some code, so - // we'll proceed to set up temporary invalid values for these fields for import purposes. Then whenever a pthread is launched at 'run' stage - // below, these values are rewritten to establish proper stack area for the particular pthread. - Module['STACK_MAX'] = Module['STACKTOP'] = 0x7FFFFFFF; - - // Module and memory were sent from main thread - wasmModule = e.data.wasmModule; - wasmMemory = e.data.wasmMemory; - buffer = wasmMemory.buffer; - - PthreadWorkerInit = e.data.PthreadWorkerInit; - - if (typeof e.data.urlOrBlob === 'string') { - importScripts(e.data.urlOrBlob); - } else { - var objectUrl = URL.createObjectURL(e.data.urlOrBlob); - importScripts(objectUrl); - URL.revokeObjectURL(objectUrl); - } - - - if (typeof FS !== 'undefined' && typeof FS.createStandardStreams === 'function') FS.createStandardStreams(); - postMessage({ cmd: 'loaded' }); - } else if (e.data.cmd === 'objectTransfer') { - PThread.receiveObjectTransfer(e.data); - } else if (e.data.cmd === 'run') { // This worker was idle, and now should start executing its pthread entry point. - __performance_now_clock_drift = performance.now() - e.data.time; // Sync up to the clock of the main thread. - threadInfoStruct = e.data.threadInfoStruct; - __register_pthread_ptr(threadInfoStruct, /*isMainBrowserThread=*/0, /*isMainRuntimeThread=*/0); // Pass the thread address inside the asm.js scope to store it for fast access that avoids the need for a FFI out. - selfThreadId = e.data.selfThreadId; - parentThreadId = e.data.parentThreadId; - // Establish the stack frame for this thread in global scope - STACK_BASE = STACKTOP = e.data.stackBase; - STACK_MAX = STACK_BASE + e.data.stackSize; - assert(threadInfoStruct); - assert(selfThreadId); - assert(parentThreadId); - assert(STACK_BASE != 0); - assert(STACK_MAX > STACK_BASE); - // Call inside asm.js/wasm module to set up the stack frame for this pthread in asm.js/wasm module scope - Module['establishStackSpace'](e.data.stackBase, e.data.stackBase + e.data.stackSize); - writeStackCookie(); - - PThread.receiveObjectTransfer(e.data); - PThread.setThreadStatus(_pthread_self(), 1/*EM_THREAD_STATUS_RUNNING*/); - - try { - // pthread entry points are always of signature 'void *ThreadMain(void *arg)' - // Native codebases sometimes spawn threads with other thread entry point signatures, - // such as void ThreadMain(void *arg), void *ThreadMain(), or void ThreadMain(). - // That is not acceptable per C/C++ specification, but x86 compiler ABI extensions - // enable that to work. If you find the following line to crash, either change the signature - // to "proper" void *ThreadMain(void *arg) form, or try linking with the Emscripten linker - // flag -s EMULATE_FUNCTION_POINTER_CASTS=1 to add in emulation for this x86 ABI extension. - var result = Module['dynCall_ii'](e.data.start_routine, e.data.arg); - - checkStackCookie(); - - } catch(e) { - if (e === 'Canceled!') { - PThread.threadCancel(); - return; - } else if (e === 'SimulateInfiniteLoop' || e === 'pthread_exit') { - return; - } else { - Atomics.store(HEAPU32, (threadInfoStruct + 4 /*C_STRUCTS.pthread.threadExitCode*/ ) >> 2, (e instanceof ExitStatus) ? e.status : -2 /*A custom entry specific to Emscripten denoting that the thread crashed.*/); - Atomics.store(HEAPU32, (threadInfoStruct + 0 /*C_STRUCTS.pthread.threadStatus*/ ) >> 2, 1); // Mark the thread as no longer running. - _emscripten_futex_wake(threadInfoStruct + 0 /*C_STRUCTS.pthread.threadStatus*/, 0x7FFFFFFF/*INT_MAX*/); // Wake all threads waiting on this thread to finish. - if (!(e instanceof ExitStatus)) throw e; - } - } - // The thread might have finished without calling pthread_exit(). If so, then perform the exit operation ourselves. - // (This is a no-op if explicit pthread_exit() had been called prior.) - if (!Module['noExitRuntime']) PThread.threadExit(result); - } else if (e.data.cmd === 'cancel') { // Main thread is asking for a pthread_cancel() on this thread. - if (threadInfoStruct && PThread.thisThreadCancelState == 0/*PTHREAD_CANCEL_ENABLE*/) { - PThread.threadCancel(); - } - } else if (e.data.target === 'setimmediate') { - // no-op - } else if (e.data.cmd === 'processThreadQueue') { - if (threadInfoStruct) { // If this thread is actually running? - _emscripten_current_thread_process_queued_calls(); - } - } else { - err('worker.js received unknown command ' + e.data.cmd); - console.error(e.data); - } - } catch(e) { - console.error('worker.js onmessage() captured an uncaught exception: ' + e); - console.error(e.stack); - throw e; - } -} - -