Tag: locking
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Deadlock
A deadlock occurs when two or more processes each hold a resource the other needs — both wait forever. Prevention requires consistent lock ordering or timeouts.
2mo ago
concurrency intermediate
Mutex & Locking
A mutex (mutual exclusion lock) ensures only one thread/process can access a critical section at a time — the fundamental primitive for preventing race conditions.
2mo ago
concurrency intermediate
Race Condition
A race condition occurs when the outcome of a program depends on the relative timing of concurrent operations — two threads reading and writing shared state without coordination.
2mo ago
concurrency intermediate
Database Deadlocks PHP 5.0+ A situation where two or more transactions hold locks the other needs, each waiting indefinitely — resolved by the database killing one transaction.
2mo ago
database advanced