{"json_modified": "2016-03-28T08:15:17.910605", "uuid": "215710ca-5b84-4a56-83a4-3f92eee2f625", "title": "JS_AddExternalStringFinalizer", "url": "/en-US/docs/Mozilla/Projects/SpiderMonkey/JSAPI_reference/JS_AddExternalStringFinalizer", "tags": ["Obsolete", "SpiderMonkey", "JSAPI Reference"], "translations": [], "modified": "2015-10-03T16:02:52", "label": "JS_AddExternalStringFinalizer", "localization_tags": [], "locale": "en-US", "id": 17356, "last_edit": "2015-10-03T16:02:44", "summary": "Add a finalizer for external strings created by <a href=\"/en-US/docs/Mozilla/Projects/SpiderMonkey/JSAPI_reference/JS_NewExternalString\" title=\"JS_NewExternalString and JS_NewExternalStringWithClosure create a new JSString whose characters are stored in external memory, i.e., memory allocated by the application, not the JavaScript engine. Since the program allocated the memory, it will need to free it; this happens in an external string finalizer indicated by the type parameter.\"><code>JS_NewExternalString</code></a> using a type-code returned from this function, and that understands how to free or release the memory pointed at by <code><a href=\"/en-US/docs/Mozilla/Projects/SpiderMonkey/JSAPI_reference/JS_GetStringChars\" title=\"JS_GetStringChars\u00a0Obsolete since JavaScript 1.8.5 returns a pointer to the first element of an array of jschars. Warnings:\"><code>JS_GetStringChars</code></a>(str)</code>.", "sections": [{"id": "Quick_Links", "title": null}, {"id": "Syntax", "title": "Syntax"}, {"id": "Callback_syntax", "title": "Callback syntax"}, {"id": "Description", "title": "Description"}, {"id": "See_Also", "title": "See Also"}], "slug": "Mozilla/Projects/SpiderMonkey/JSAPI_reference/JS_AddExternalStringFinalizer", "review_tags": []}