{"json_modified": "2016-03-28T08:40:46.165650", "uuid": "c7ec263f-c314-4664-9778-34e363c9359a", "title": "JSFreeOp", "url": "/en-US/docs/Mozilla/Projects/SpiderMonkey/JSAPI_reference/JSFreeOp", "tags": ["R\u00e9f\u00e9rence", "Reference", "SpiderMonkey", "JSAPI Reference"], "translations": [], "modified": "2015-01-18T15:52:42", "label": "JSFreeOp", "localization_tags": [], "locale": "en-US", "id": 132813, "last_edit": "2015-01-18T15:52:33", "summary": "Various finalization API takes not <a href=\"/en-US/docs/Mozilla/Projects/SpiderMonkey/JSAPI_reference/JSRuntime\" title=\"In the JSAPI, JSRuntime is the top-level object that represents an instance of the JavaScript engine. A program typically has only one JSRuntime, even if it has many threads. The JSRuntime is the universe in which JavaScript objects live; they can't travel to other JSRuntimes.\"><code>JSContext *</code></a> but rather either <code>JSFreeOp</code> structure or its library-private counterpart <code>FreeOp</code>. These structures wrap parameters that are passed to the finalizers removing most of explicit dependencies on <a href=\"/en-US/docs/Mozilla/Projects/SpiderMonkey/JSAPI_reference/JSRuntime\" title=\"In the JSAPI, JSRuntime is the top-level object that represents an instance of the JavaScript engine. A program typically has only one JSRuntime, even if it has many threads. The JSRuntime is the universe in which JavaScript objects live; they can't travel to other JSRuntimes.\"><code>JSContext</code></a> in the finalization code.", "sections": [{"id": "Quick_Links", "title": null}, {"id": "Syntax", "title": "Syntax"}, {"id": "Methods", "title": "Methods"}, {"id": "Description", "title": "Description"}, {"id": "See_Also", "title": "See Also"}], "slug": "Mozilla/Projects/SpiderMonkey/JSAPI_reference/JSFreeOp", "review_tags": ["technical"]}