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authorraysan5 <[email protected]>2017-07-24 20:04:54 +0200
committerraysan5 <[email protected]>2017-07-24 20:04:54 +0200
commit072684d276373b58ddf7203e34b66a14f6e0c848 (patch)
tree64dd10af55f0602864ce79eb9c46a23531341059 /docs/examples/web/physac/pthread-main.js
parentb2712b6db7c184aff47436f387f2012cf77f4f67 (diff)
downloadraylib-072684d276373b58ddf7203e34b66a14f6e0c848.tar.gz
raylib-072684d276373b58ddf7203e34b66a14f6e0c848.zip
Removed webpage from raylib repo
Moved to own repo at @raysan5/raylib.com
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-// 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 STATICTOP = 0;
-var staticSealed = true; // When threads are being initialized, the static memory area has been already sealed a long time ago.
-var DYNAMIC_BASE = 0;
-
-var ENVIRONMENT_IS_PTHREAD = true;
-
-// 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 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);
-}
-function threadAlert() {
- var text = Array.prototype.slice.call(arguments).join(' ');
- postMessage({cmd: 'alert', text: text, threadId: selfThreadId});
-}
-Module['print'] = threadPrint;
-Module['printErr'] = threadPrintErr;
-this.alert = threadAlert;
-
-this.onmessage = function(e) {
- 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:
- buffer = e.data.buffer;
- Module['TOTAL_MEMORY'] = TOTAL_MEMORY = e.data.TOTAL_MEMORY;
- STATICTOP = e.data.STATICTOP;
- DYNAMIC_BASE = e.data.DYNAMIC_BASE;
- DYNAMICTOP_PTR = e.data.DYNAMICTOP_PTR;
-
- PthreadWorkerInit = e.data.PthreadWorkerInit;
- importScripts(e.data.url);
- if (typeof FS !== 'undefined') 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.
- 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.
- assert(threadInfoStruct);
- selfThreadId = e.data.selfThreadId;
- parentThreadId = e.data.parentThreadId;
- assert(selfThreadId);
- assert(parentThreadId);
- // TODO: Emscripten runtime has these variables twice(!), once outside the asm.js module, and a second time inside the asm.js module.
- // Review why that is? Can those get out of sync?
- STACK_BASE = STACKTOP = e.data.stackBase;
- STACK_MAX = STACK_BASE + e.data.stackSize;
- assert(STACK_BASE != 0);
- assert(STACK_MAX > STACK_BASE);
- Runtime.establishStackSpace(e.data.stackBase, e.data.stackBase + e.data.stackSize);
- var result = 0;
-
- PThread.receiveObjectTransfer(e.data);
-
- PThread.setThreadStatus(_pthread_self(), 1/*EM_THREAD_STATUS_RUNNING*/);
-
- try {
- // HACK: Some code in the wild has instead signatures of form 'void *ThreadMain()', which seems to be ok in native code.
- // To emulate supporting both in test suites, use the following form. This is brittle!
- if (typeof asm['dynCall_ii'] !== 'undefined') {
- result = asm.dynCall_ii(e.data.start_routine, e.data.arg); // pthread entry points are always of signature 'void *ThreadMain(void *arg)'
- } else {
- result = asm.dynCall_i(e.data.start_routine); // as a hack, try signature 'i' as fallback.
- }
- } catch(e) {
- if (e === 'Canceled!') {
- PThread.threadCancel();
- return;
- } else {
- Atomics.store(HEAPU32, (threadInfoStruct + 4 /*{{{ C_STRUCTS.pthread.threadExitCode }}}*/ ) >> 2, -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
- 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 console.log('pthread noExitRuntime: not quitting.');
- } 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 {
- Module['printErr']('pthread-main.js received unknown command ' + e.data.cmd);
- }
-}