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Merge pull request #793 from cwillisf/remove-threads-safely

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Make _removeThread safe during thread iteration
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Chris Willis-Ford 2017-12-06 17:18:10 -08:00 committed by GitHub
commit e7bbad60e8
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1 changed files with 12 additions and 16 deletions
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28
src/engine/runtime.js
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@ -806,17 +806,14 @@ class Runtime extends EventEmitter {
}
/**
* Remove a thread from the list of threads.
* @param {?Thread} thread Thread object to remove from actives
* Stop a thread: stop running it immediately, and remove it from the thread list later.
* @param {!Thread} thread Thread object to remove from actives
*/
_removeThread (thread) {
_stopThread (thread) {
// Mark the thread for later removal
thread.isKilled = true;
// Inform sequencer to stop executing that thread.
this.sequencer.retireThread(thread);
// Remove from the list.
const i = this.threads.indexOf(thread);
if (i > -1) {
this.threads.splice(i, 1);
}
}
/**
@ -879,7 +876,7 @@ class Runtime extends EventEmitter {
// edge activated hat thread that runs every frame
continue;
}
this._removeThread(this.threads[i]);
this._stopThread(this.threads[i]);
return;
}
}
@ -1055,8 +1052,7 @@ class Runtime extends EventEmitter {
continue;
}
if (this.threads[i].target === target) {
this.threads[i].isKilled = true;
this._removeThread(this.threads[i]);
this._stopThread(this.threads[i]);
}
}
}
@ -1096,11 +1092,7 @@ class Runtime extends EventEmitter {
}
this.targets = newTargets;
// Dispose all threads.
const threadsCopy = this.threads.slice();
while (threadsCopy.length > 0) {
const poppedThread = threadsCopy.pop();
this._removeThread(poppedThread);
}
this.threads.forEach(thread => this._stopThread(thread));
}
/**
@ -1114,6 +1106,10 @@ class Runtime extends EventEmitter {
}
this.profiler.start(stepProfilerId);
}
// Clean up threads that were told to stop during or since the last step
this.threads = this.threads.filter(thread => !thread.isKilled);
// Find all edge-activated hats, and add them to threads to be evaluated.
for (const hatType in this._hats) {
if (!this._hats.hasOwnProperty(hatType)) continue;