A condition variable is a synchronization primitive used in concurrent programming to enable threads or processes to wait for a specific condition to occur before proceeding further. It allows threads to communicate and synchronize with each other by waiting for a certain condition to become true. When the condition changes, the variable is signaled, and waiting threads are awakened. Condition variables are often used in combination with mutexes to ensure that code sections that need to be executed exclusively by one thread are protected.
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