void Mutex::unlock()
{
if (!is_held_by_current_thread()) {
throw MutexError("thread does not own mutex");
}
_tid = INVALID_ID;
_lock_depth -= 1;
_real_mutex.unlock();
}
void Mutex::lock()
{
if (is_held_by_current_thread()) {
throw MutexError("thread already owns mutex");
}
_real_mutex.lock();
_tid = boost::this_thread::get_id();
_lock_depth += 1;
}
Mutex::Mutex(void)
{
#if defined(DUNE_SYS_HAS_PTHREAD_MUTEX)
int rv = 0;
if ((rv = pthread_mutexattr_init(&m_attr)) != 0)
throw MutexError(rv);
// Enable priority inheritance if supported.
# if (_POSIX_THREAD_PRIO_INHERIT != -1) && defined(PTHREAD_PRIO_INHERIT)
if ((rv = pthread_mutexattr_setprotocol(&m_attr, PTHREAD_PRIO_INHERIT)) != 0)
throw MutexError(rv);
# endif
if ((rv = pthread_mutex_init(&m_mutex, &m_attr)) != 0)
throw MutexError(rv);
#endif
}
void Mutex::Init(MutexType _type)
{
mutex = (pthread_mutex_t*) new pthread_mutex_t;
type = _type;
pthread_mutexattr_t attr;
if(pthread_mutexattr_init(&attr) != 0)
{
std::cerr << "pthread_attr_init: " << strerror(errno);
throw MutexError();
}
switch(type)
{
case NORMAL_MUTEX:
//#ifdef DEBUG
if(pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_ERRORCHECK) != 0)
{
std::cerr << "pthread_mutexattr_settype: " << strerror(errno) << std::endl;
throw MutexError();
}
//#else
// pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_NORMAL);
//#endif
break;
case RECURSIVE_MUTEX:
if(pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE) != 0)
{
std::cerr << "pthread_mutexattr_settype: " << strerror(errno) << std::endl;
throw MutexError();
}
break;
default:
assert(false);
}
if(pthread_mutex_init(mutex, &attr) != 0)
{
std::cerr << "pthread_mutex_init: " << strerror(errno) << std::endl;
throw MutexError();
}
pthread_mutexattr_destroy(&attr);
}
void
Mutex::tryLock(void)
{
#if defined(DUNE_SYS_HAS_PTHREAD_MUTEX)
int rv = pthread_mutex_trylock(&m_mutex);
if (rv != 0)
throw MutexError("tryLock", rv);
#endif
}
void
Mutex::destroy(void)
{
#if defined(DUNE_SYS_HAS_PTHREAD_MUTEX)
int rv = pthread_mutex_destroy(&m_mutex);
if (rv != 0)
throw MutexError("destroy", rv);
#endif
}
