9  * A simple mutex wrapper, supporting locks and read-write locks.
28 #include <mutex>
29 typedef std::mutex MutexType;
34 class Mutex {
36   inline Mutex();
37   inline ~Mutex();
45   inline void ReaderUnlock(); // Release a read share of this Mutex
52   // Catch the error of writing Mutex when intending MutexLock.
53   Mutex(Mutex *ignored);
55   Mutex(const Mutex&) = delete;
56   Mutex& operator=(const Mutex&) = delete;
66 Mutex::Mutex()             { SAFE_PTHREAD(pthread_rwlock_init(&mutex_, NULL)); }  in Mutex()  function
67 Mutex::~Mutex()            { SAFE_PTHREAD(pthread_rwlock_destroy(&mutex_)); }  in ~Mutex()
68 void Mutex::Lock()         { SAFE_PTHREAD(pthread_rwlock_wrlock(&mutex_)); }  in Lock()
69 void Mutex::Unlock()       { SAFE_PTHREAD(pthread_rwlock_unlock(&mutex_)); }  in Unlock()
70 void Mutex::ReaderLock()   { SAFE_PTHREAD(pthread_rwlock_rdlock(&mutex_)); }  in ReaderLock()
71 void Mutex::ReaderUnlock() { SAFE_PTHREAD(pthread_rwlock_unlock(&mutex_)); }  in ReaderUnlock()
77 Mutex::Mutex()             { }  in Mutex()  function
78 Mutex::~Mutex()            { }  in ~Mutex()
79 void Mutex::Lock()         { mutex_.lock(); }  in Lock()
80 void Mutex::Unlock()       { mutex_.unlock(); }  in Unlock()
81 void Mutex::ReaderLock()   { Lock(); }  // C++11 doesn't have std::shared_mutex.  in ReaderLock()
82 void Mutex::ReaderUnlock() { Unlock(); }  in ReaderUnlock()
92   explicit MutexLock(Mutex *mu) : mu_(mu) { mu_->Lock(); }  in MutexLock()
95   Mutex * const mu_;
104   explicit ReaderMutexLock(Mutex *mu) : mu_(mu) { mu_->ReaderLock(); }  in ReaderMutexLock()
107   Mutex * const mu_;
115   explicit WriterMutexLock(Mutex *mu) : mu_(mu) { mu_->WriterLock(); }  in WriterMutexLock()
118   Mutex * const mu_;