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This compliant solution uses Standard Template Library facilities to ensure that deadlock does not occur due to circular wait conditions. The std::lock() function takes a variable number of lockable objects and attempts to lock them such that deadlock does not occur [ISO/IEC 14882-2014]. In typical implementations, this is done by using a combination of lock(), try_lock(), and unlock() to attempt to lock the object and backing off if the lock is not acquired, which may have worse performance than a solution that locks in predefined order explicitly.
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| CERT Oracle Secure Coding Standard for Java | LCK07-J. Avoid deadlock by requesting and releasing locks in the same order |
| MITRE CWE | CWE-764, Multiple Locks of a Critical Resource |
Bibliography
| [ISO/IEC 14882-2014] | Subclause 30.4, "Mutual Exclusion" |
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