The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 26, 2021
Filed:
Apr. 10, 2019
Apple Inc., Cupertino, CA (US);
Jainam A. Shah, San Jose, CA (US);
Jeremy C. Andrus, Sunnyvale, CA (US);
Daniel A. Chimene, San Francisco, CA (US);
Kushal Dalmia, Santa Clara, CA (US);
Pierre Habouzit, San Jose, CA (US);
James M. Magee, Orlando, FL (US);
Marina Sadini, Cupertino, CA (US);
Daniel A. Steffen, San Francisco, CA (US);
Apple Inc., Cupertino, CA (US);
Abstract
One embodiment provides for a computer-implemented method comprising instantiating a synchronization primitive to control access to a resource, acquiring the synchronization primitive at a first thread, the first thread having a first priority, associating a turnstile with the synchronization primitive, setting an inheritor of the turnstile to the first thread, attempting to acquire the synchronization primitive at a second thread while the synchronization primitive is held by the first thread, the second thread having a second priority, adding the second thread to a wait queue of the turnstile; and in response to determining that the second priority is higher than the first priority, increasing the priority of the first thread to the second priority.