f58aff630c
WaitSemaphore and PostSemaphore are used in the HybridMutex implementation. If HybridMutex did not have to call WaitSemaphore when acquired, then calling PostSemaphore would cause the internal count inside sem_t to slowly grow to large values and eventually cause overflow. Change-Id: I173fc17c874b49926e56991405e9086ea8c138fc