/*
* Thread beginning
*/
static void *ProxyFunc( void *arg )
{
CPThread *parent = (CPThread*)arg;
// Set this thread's thread specific storage to IThread instance pointer
if(pthread_setspecific(threadSpecificKey, parent) != 0)
throw EThread("cannot set thread ptr in thread specific storage.");
// Allow to terminate the thread without cancellation point
pthread_setcanceltype(PTHREAD_CANCEL_ASYNCHRONOUS, 0);
// Run the code of the thread
parent->Runnable->run();
{
pthread_t thread_self = pthread_self();
// Make sure the parent still cares
// If this thread was replaced with a new thread (which should not happen),
// and the IThread object has been deleted, this will likely crash.
if (parent->_ThreadHandle == thread_self)
parent->_State = CPThread::ThreadStateFinished;
else
throw EThread("Thread ended after being detached, this should not happen");
}
// Allow some clean
// pthread_exit(0);
return NULL;
}
CPMainThread() : CPThread(NULL, 0)
{
if(pthread_key_create(&threadSpecificKey, NULL) != 0)
throw EThread("cannot create thread specific storage key.");
if(pthread_setspecific(threadSpecificKey, this) != 0)
throw EThread("cannot set main thread ptr in thread specific storage.");
}
void CWinThread::start ()
{
if (isRunning())
throw EThread("Starting a thread that is already started, existing thread will continue running, this should not happen");
// ThreadHandle = (void *) ::CreateThread (NULL, _StackSize, ProxyFunc, this, 0, (DWORD *)&ThreadId);
ThreadHandle = (void *) ::CreateThread (NULL, 0, ProxyFunc, this, 0, (DWORD *)&ThreadId);
// nldebug("NLMISC: thread %x started for runnable '%x'", typeid( Runnable ).name());
// OutputDebugString(toString(NL_LOC_MSG " NLMISC: thread %x started for runnable '%s'\n", ThreadId, typeid( *Runnable ).name()).c_str());
SetThreadPriorityBoost (ThreadHandle, TRUE); // FALSE == Enable Priority Boost
if (ThreadHandle == NULL)
{
throw EThread ( "Cannot create new thread" );
}
_SuspendCount = 0;
}
/*
* start
*/
void CPThread::start()
{
pthread_attr_t tattr;
int ret;
if (_StackSize != 0)
{
/* initialized with default attributes */
ret = pthread_attr_init(&tattr);
/* setting the size of the stack also */
ret = pthread_attr_setstacksize(&tattr, _StackSize);
}
bool detach_old_thread = false;
pthread_t old_thread_handle;
if (_State != ThreadStateNone)
{
if (_State == ThreadStateRunning)
{
// I don't know if this behaviour is allowed, but neither thread implementations
// check the start function, and both simply let the existing running thread for what it is...
// From now on, this is not allowed.
throw EThread("Starting a thread that is already started, existing thread will continue running, this should not happen");
}
detach_old_thread = true;
old_thread_handle = _ThreadHandle;
}
if (pthread_create(&_ThreadHandle, _StackSize != 0 ? &tattr : NULL, ProxyFunc, this) != 0)
{
throw EThread("Cannot start new thread");
}
_State = ThreadStateRunning;
if (detach_old_thread)
{
// Docs don't say anything about what happens when pthread_create is called with existing handle referenced.
if (old_thread_handle == _ThreadHandle)
throw EThread("Thread handle did not change, this should not happen");
// Don't care about old thread, free resources when it terminates.
pthread_detach(old_thread_handle);
}
}
/*
* wait
*/
void CPThread::wait ()
{
if(_State == 1)
{
if(pthread_join(_ThreadHandle, 0) != 0)
{
throw EThread( "Cannot join with thread" );
}
_State = 2; // set to finished
}
}
/*
* wait
*/
void CPThread::wait ()
{
if (_State == ThreadStateRunning)
{
int error = pthread_join(_ThreadHandle, 0);
switch (error)
{
case 0:
break;
case EINVAL:
throw EThread("Thread is not joinable");
case ESRCH:
throw EThread("No thread found with this id");
case EDEADLK:
throw EThread("Deadlock detected or calling thread waits for itself");
default:
throw EThread("Unknown thread join error");
}
if(_State != ThreadStateFinished)
throw EThread("Thread did not finish, this should not happen");
}
}
/*
* start
*/
void CPThread::start()
{
pthread_attr_t tattr;
pthread_t tid;
int ret;
/* initialized with default attributes */
ret = pthread_attr_init(&tattr);
/* setting the size of the stack also */
ret = pthread_attr_setstacksize(&tattr, _StackSize);
if(pthread_create(&_ThreadHandle, _StackSize != 0 ? &tattr : 0, ProxyFunc, this) != 0)
{
throw EThread("Cannot start new thread");
}
_State = 1;
}
~CPMainThread()
{
if(pthread_key_delete(threadSpecificKey) != 0)
throw EThread("cannot delete thread specific storage key.");
}
