diff options
Diffstat (limited to 'examples/web/physics/physics_friction.worker.js')
| -rw-r--r-- | examples/web/physics/physics_friction.worker.js | 199 |
1 files changed, 1 insertions, 198 deletions
diff --git a/examples/web/physics/physics_friction.worker.js b/examples/web/physics/physics_friction.worker.js index 1686ce5..26455f5 100644 --- a/examples/web/physics/physics_friction.worker.js +++ b/examples/web/physics/physics_friction.worker.js @@ -1,198 +1 @@ -// 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 DYNAMIC_BASE = 0; - -var noExitRuntime; - -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 = {}; - -// These modes need to assign to these variables because of how scoping works in them. - - -// 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 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}); -} -var err = threadPrintErr; -this.alert = threadAlert; - -// When using postMessage to send an object, it is processed by the structured clone algorithm. -// The prototype, and hence methods, on that object is then lost. This function adds back the lost prototype. -// This does not work with nested objects that has prototypes, but it suffices for WasmSourceMap and WasmOffsetConverter. -function resetPrototype(constructor, attrs) { - var object = Object.create(constructor.prototype); - for (var key in attrs) { - if (attrs.hasOwnProperty(key)) { - object[key] = attrs[key]; - } - } - return object; -} - -Module['instantiateWasm'] = function(info, receiveInstance) { - // Instantiate from the module posted from the main thread. - // We can just use sync instantiation in the worker. - var 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: - 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; - Module['ENVIRONMENT_IS_PTHREAD'] = true; - - 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 - var max = e.data.stackBase + e.data.stackSize; - var top = e.data.stackBase; - STACK_BASE = top; - STACKTOP = top; - STACK_MAX = max; - // 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); - - 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); - - - } 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 (!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; - } -}; - - +var Module={};function threadPrintErr(){var text=Array.prototype.slice.call(arguments).join(" ");console.error(text)}function threadAlert(){var text=Array.prototype.slice.call(arguments).join(" ");postMessage({cmd:"alert",text:text,threadId:Module["_pthread_self"]()})}var err=threadPrintErr;this.alert=threadAlert;Module["instantiateWasm"]=function(info,receiveInstance){var instance=new WebAssembly.Instance(Module["wasmModule"],info);Module["wasmModule"]=null;receiveInstance(instance);return instance.exports};function moduleLoaded(){}this.onmessage=function(e){try{if(e.data.cmd==="load"){Module["wasmModule"]=e.data.wasmModule;Module["wasmMemory"]=e.data.wasmMemory;Module["buffer"]=Module["wasmMemory"].buffer;Module["ENVIRONMENT_IS_PTHREAD"]=true;if(typeof e.data.urlOrBlob==="string"){importScripts(e.data.urlOrBlob)}else{var objectUrl=URL.createObjectURL(e.data.urlOrBlob);importScripts(objectUrl);URL.revokeObjectURL(objectUrl)}moduleLoaded()}else if(e.data.cmd==="objectTransfer"){Module["PThread"].receiveObjectTransfer(e.data)}else if(e.data.cmd==="run"){Module["__performance_now_clock_drift"]=performance.now()-e.data.time;Module["__emscripten_thread_init"](e.data.threadInfoStruct,0,0);var max=e.data.stackBase;var top=e.data.stackBase+e.data.stackSize;Module["establishStackSpace"](top,max);Module["_emscripten_tls_init"]();Module["PThread"].receiveObjectTransfer(e.data);Module["PThread"].setThreadStatus(Module["_pthread_self"](),1);try{var result=Module["invokeEntryPoint"](e.data.start_routine,e.data.arg);if(!Module["getNoExitRuntime"]())Module["PThread"].threadExit(result)}catch(ex){if(ex==="Canceled!"){Module["PThread"].threadCancel()}else if(ex!="unwind"){if(ex instanceof Module["ExitStatus"]){if(Module["getNoExitRuntime"]()){}else{Module["PThread"].threadExit(ex.status)}}else{Module["PThread"].threadExit(-2);throw ex}}}}else if(e.data.cmd==="cancel"){if(Module["_pthread_self"]()){Module["PThread"].threadCancel()}}else if(e.data.target==="setimmediate"){}else if(e.data.cmd==="processThreadQueue"){if(Module["_pthread_self"]()){Module["_emscripten_current_thread_process_queued_calls"]()}}else{err("worker.js received unknown command "+e.data.cmd);err(e.data)}}catch(ex){err("worker.js onmessage() captured an uncaught exception: "+ex);if(ex&&ex.stack)err(ex.stack);throw ex}};if(typeof process==="object"&&typeof process.versions==="object"&&typeof process.versions.node==="string"){self={location:{href:__filename}};var onmessage=this.onmessage;var nodeWorkerThreads=require("worker_threads");global.Worker=nodeWorkerThreads.Worker;var parentPort=nodeWorkerThreads.parentPort;parentPort.on("message",function(data){onmessage({data:data})});var nodeFS=require("fs");var nodeRead=function(filename){return nodeFS.readFileSync(filename,"utf8")};function globalEval(x){global.require=require;global.Module=Module;eval.call(null,x)}importScripts=function(f){globalEval(nodeRead(f))};postMessage=function(msg){parentPort.postMessage(msg)};if(typeof performance==="undefined"){performance={now:function(){return Date.now()}}}} |