void *
thread_func (void *arg)
{
int i = (int) (long) arg;
do
{
// 좌우 두개 젓가락 모두 사용가능 할 때만 젖가락을 집는다.
while(1)
{
if(tsem_try_wait(chopstick[i]) != 0)
{
continue;
}
if(tsem_try_wait(chopstick[(i + 1) % 5]) == 0)
{
break;
}
// 왼쪽 젖가락을 사용 할 수 없으면 오른쪽 젖가락을 내려 놓는다.
tsem_signal (chopstick[i]);
}
update_status (i, 1);
tsem_signal (chopstick[i]);
// 포크 하나를 내려놓고 다른 철학자가 포크를 하나 집을때 까지 기다린다.
while(tsem_try_wait(chopstick[i]) == 0)
{
tsem_signal (chopstick[i]);
}
tsem_signal (chopstick[(i + 1) % 5]);
update_status (i, 0);
}
while (1);
return NULL;
}
static void
update_status (int i,
int eating)
{
static int status[5] = { 0, };
int idx;
status[i] = eating;
tsem_wait (printing);
int sum = 0;
for (idx = 0; idx < 5; idx++)
{
fprintf (stdout, "%3s ", status[idx] ? "EAT" : "...");
sum += status[idx];
}
fprintf (stdout, "\n");
assert(sum > 0); // 항상 한명 이상이 식사중인지 체크
tsem_signal (printing);
}
/** @brief Releases buffers under processing.
* This function must be implemented in the derived classes, for the
* specific processing
*/
OMX_ERRORTYPE clocksrc_port_FlushProcessingBuffers(omx_base_PortType *openmaxStandPort) {
omx_clocksrc_component_PrivateType* omx_clocksrc_component_Private;
OMX_BUFFERHEADERTYPE* pBuffer;
int errQue;
DEBUG(DEB_LEV_FUNCTION_NAME, "In %s\n", __func__);
omx_clocksrc_component_Private = (omx_clocksrc_component_PrivateType*)openmaxStandPort->standCompContainer->pComponentPrivate;
pthread_mutex_lock(&omx_clocksrc_component_Private->flush_mutex);
openmaxStandPort->bIsPortFlushed=OMX_TRUE;
/*Signal the buffer management thread of port flush,if it is waiting for buffers*/
if(omx_clocksrc_component_Private->bMgmtSem->semval==0) {
tsem_up(omx_clocksrc_component_Private->bMgmtSem);
}
tsem_up(omx_clocksrc_component_Private->clockEventSem);
tsem_up(omx_clocksrc_component_Private->clockEventCompleteSem);
if(omx_clocksrc_component_Private->state==OMX_StatePause ) {
/*Waiting at paused state*/
tsem_signal(omx_clocksrc_component_Private->bStateSem);
}
DEBUG(DEB_LEV_FULL_SEQ, "In %s waiting for flush all condition port index =%d\n", __func__,(int)openmaxStandPort->sPortParam.nPortIndex);
/* Wait until flush is completed */
pthread_mutex_unlock(&omx_clocksrc_component_Private->flush_mutex);
tsem_down(omx_clocksrc_component_Private->flush_all_condition);
tsem_reset(omx_clocksrc_component_Private->bMgmtSem);
tsem_reset(omx_clocksrc_component_Private->clockEventSem);
/* Flush all the buffers not under processing */
while (openmaxStandPort->pBufferSem->semval > 0) {
DEBUG(DEB_LEV_FULL_SEQ, "In %s TFlag=%x Flusing Port=%d,Semval=%d Qelem=%d\n",
__func__,(int)openmaxStandPort->nTunnelFlags,(int)openmaxStandPort->sPortParam.nPortIndex,
(int)openmaxStandPort->pBufferSem->semval,(int)openmaxStandPort->pBufferQueue->nelem);
tsem_down(openmaxStandPort->pBufferSem);
pBuffer = dequeue(openmaxStandPort->pBufferQueue);
if (PORT_IS_TUNNELED(openmaxStandPort) && !PORT_IS_BUFFER_SUPPLIER(openmaxStandPort)) {
DEBUG(DEB_LEV_FULL_SEQ, "In %s: Comp %s is returning io:%d buffer\n",
__func__,omx_clocksrc_component_Private->name,(int)openmaxStandPort->sPortParam.nPortIndex);
if (openmaxStandPort->sPortParam.eDir == OMX_DirInput) {
((OMX_COMPONENTTYPE*)(openmaxStandPort->hTunneledComponent))->FillThisBuffer(openmaxStandPort->hTunneledComponent, pBuffer);
} else {
((OMX_COMPONENTTYPE*)(openmaxStandPort->hTunneledComponent))->EmptyThisBuffer(openmaxStandPort->hTunneledComponent, pBuffer);
}
} else if (PORT_IS_TUNNELED_N_BUFFER_SUPPLIER(openmaxStandPort)) {
errQue = queue(openmaxStandPort->pBufferQueue,pBuffer);
if (errQue) {
/* /TODO the queue is full. This can be handled in a fine way with
* some retrials, or other checking. For the moment this is a critical error
* and simply causes the failure of this call
*/
return OMX_ErrorInsufficientResources;
}
} else {
(*(openmaxStandPort->BufferProcessedCallback))(
openmaxStandPort->standCompContainer,
omx_clocksrc_component_Private->callbackData,
pBuffer);
}
}
/*Port is tunneled and supplier and didn't received all it's buffer then wait for the buffers*/
if (PORT_IS_TUNNELED_N_BUFFER_SUPPLIER(openmaxStandPort)) {
while(openmaxStandPort->pBufferQueue->nelem!= openmaxStandPort->nNumAssignedBuffers){
tsem_down(openmaxStandPort->pBufferSem);
DEBUG(DEB_LEV_PARAMS, "In %s Got a buffer qelem=%d\n",__func__,openmaxStandPort->pBufferQueue->nelem);
}
tsem_reset(openmaxStandPort->pBufferSem);
}
pthread_mutex_lock(&omx_clocksrc_component_Private->flush_mutex);
openmaxStandPort->bIsPortFlushed=OMX_FALSE;
pthread_mutex_unlock(&omx_clocksrc_component_Private->flush_mutex);
tsem_up(omx_clocksrc_component_Private->flush_condition);
DEBUG(DEB_LEV_FULL_SEQ, "Out %s Port Index=%d bIsPortFlushed=%d Component %s\n", __func__,
(int)openmaxStandPort->sPortParam.nPortIndex,(int)openmaxStandPort->bIsPortFlushed,omx_clocksrc_component_Private->name);
DEBUG(DEB_LEV_PARAMS, "In %s TFlag=%x Qelem=%d BSem=%d bMgmtsem=%d component=%s\n", __func__,
(int)openmaxStandPort->nTunnelFlags,
(int)openmaxStandPort->pBufferQueue->nelem,
(int)openmaxStandPort->pBufferSem->semval,
(int)omx_clocksrc_component_Private->bMgmtSem->semval,
omx_clocksrc_component_Private->name);
DEBUG(DEB_LEV_FUNCTION_NAME, "Out %s Port Index=%d\n", __func__,(int)openmaxStandPort->sPortParam.nPortIndex);
return OMX_ErrorNone;
}