Mutexes - POSIX Implementation

Really there isn't much to say, here. The POSIX version of our mutex is nothing more than a thin wrapper around a pthread_mutex, with profuse use of our verify macro.

class CCondition; // Circular reference incoming. We don't have any choice but to forward declare it. class CMutex // POSIX version of CMutex: pthread_mutex (fast?) { private: pthread_mutex_t m_mutex; inline pthread_mutex_t &GetMutex() { return m_mutex; } public: // Compatible prototype, even though the spin count is unused inline CMutex(unsigned int nSpinCount = 0) { if (pthread_mutex_init(&m_mutex) != 0) throw bad_alloc("Unable to create mutex"); } inline ~CMutex() { verify(pthread_mutex_destroy(&m_mutex) == 0); } inline bool TryEnter() { return (pthread_mutex_trylock(&m_mutex) == 0); } inline void Enter() { verify(pthread_mutex_lock(&m_mutex) == 0); } inline void Leave() { verify(pthread_mutex_unlock(&m_mutex) == 0); } // Allow CCondition to access the mutex directly friend class CCondition; };