A Thread Using POSIX Condition Variables, a Thread

question 24

Multiple Choice

A thread using POSIX condition variables, a thread

• A) must lock the associated mutex lock before calling pthread_cond_wait( ) and unlock it after calling pthread_cond_signal( ).
• B) must lock the associated mutex lock before calling pthread_cond_wait( ), but doesn't need to unlock it after calling pthread_cond_signal( ).
• C) doesn't need to lock the associated mutex lock before calling pthread_cond_wait( ), but must unlock it after calling pthread_cond_signal( ).
• D) doesn't need to lock the associated mutex lock before calling pthread_cond_wait( ) and doesn't need to unlock it after calling pthread_cond_signal( ).

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Definitions:

Heartbeat

The rhythmic contraction and relaxation of the heart muscle, resulting in the pumping of blood through the body.

Diastole

The phase of the cardiac cycle during which the heart relaxes and fills with blood.

Heart Cycle

The sequence of events that occur in the heart during one heartbeat, encompassing both the contraction (systole) and relaxation (diastole) phases.

Relaxation

The act or process of becoming less tense, stressed, or anxious, often involving techniques or activities that promote this state.