diff --git a/targets/RT/USER/lte-ue.c b/targets/RT/USER/lte-ue.c
index 7f94d6054c67fdcbb4b52c1610909a1b88a7a851..d6eb39e09c1fd127910338131df73605e553334b 100644
--- a/targets/RT/USER/lte-ue.c
+++ b/targets/RT/USER/lte-ue.c
@@ -634,38 +634,36 @@ static void *UE_thread_tx(void *arg)
return(0);
}
-//! \brief .
-//! This is a pthread.
-//! \param arg expects a pointer to \ref PHY_VARS_UE.
+/*!
+ * \brief This is the UE receive thread.
+ * This thread performs the phy_procedures_UE_RX() on every received slot.
+ * \param arg is a pointer to a \ref PHY_VARS_UE structure.
+ * \returns a pointer to an int. The storage is not on the heap and must not be freed.
+ */
static void *UE_thread_rx(void *arg)
{
-
+ static int UE_thread_rx_retval;
PHY_VARS_UE *UE = (PHY_VARS_UE*)arg;
int i;
int ret;
-#ifdef LOWLATENCY
- struct sched_attr attr;
- unsigned int flags = 0;
-#endif
-#ifdef RTAI
- RT_TASK *task;
-#endif
-
UE->instance_cnt_rx=-1;
#ifdef RTAI
- task = rt_task_init_schmod(nam2num("UE RX Thread"), 0, 0, 0, SCHED_FIFO, 0xF);
+ RT_TASK *task = rt_task_init_schmod(nam2num("UE RX Thread"), 0, 0, 0, SCHED_FIFO, 0xF);
if (task==NULL) {
LOG_E(PHY,"[SCHED][UE] Problem starting UE RX thread!!!!\n");
- return 0;
+ return &UE_thread_rx_retval;
}
LOG_D(HW,"Started UE RX thread (id %p)\n",task);
#else
#ifdef LOWLATENCY
+ struct sched_attr attr;
+ unsigned int flags = 0;
+
attr.size = sizeof(attr);
attr.sched_flags = 0;
attr.sched_nice = 0;
@@ -679,12 +677,13 @@ static void *UE_thread_rx(void *arg)
if (sched_setattr(0, &attr, flags) < 0 ) {
perror("[SCHED] eNB tx thread: sched_setattr failed\n");
- exit(-1);
+ return &UE_thread_rx_retval;
}
#endif
#endif
+ // Lock memory from swapping. This is a process wide call (not constraint to this thread).
mlockall(MCL_CURRENT | MCL_FUTURE);
printf("waiting for sync (UE_thread_rx)\n");
@@ -701,32 +700,32 @@ static void *UE_thread_rx(void *arg)
printf("Starting UE RX thread\n");
while (!oai_exit) {
- // printf("UE_thread_rx: locking UE RX mutex\n");
if (pthread_mutex_lock(&UE->mutex_rx) != 0) {
- LOG_E(PHY,"[SCHED][eNB] error locking mutex for UE RX\n");
+ LOG_E( PHY, "[SCHED][UE] error locking mutex for UE RX\n" );
exit_fun("nothing to add");
- break;
+ return &UE_thread_rx_retval;
}
while (UE->instance_cnt_rx < 0) {
- pthread_cond_wait(&UE->cond_rx,&UE->mutex_rx);
+ // most of the time, the thread is waiting here
+ pthread_cond_wait( &UE->cond_rx, &UE->mutex_rx );
}
if (pthread_mutex_unlock(&UE->mutex_rx) != 0) {
- LOG_E(PHY,"[SCHED][eNB] error unlocking mutex for UE RX\n");
+ LOG_E( PHY, "[SCHED][UE] error unlocking mutex for UE RX\n" );
exit_fun("nothing to add");
- break;
+ return &UE_thread_rx_retval;
}
for (i=0; i<2; i++) {
- if ((subframe_select(&UE->lte_frame_parms,UE->slot_rx>>1)==SF_DL) |
+ if ((subframe_select( &UE->lte_frame_parms, UE->slot_rx>>1 ) == SF_DL) ||
(UE->lte_frame_parms.frame_type == FDD)) {
- phy_procedures_UE_RX(UE,0,0,UE->mode,no_relay,NULL);
+ phy_procedures_UE_RX( UE, 0, 0, UE->mode, no_relay, NULL );
}
- if ((subframe_select(&UE->lte_frame_parms,UE->slot_rx>>1)==SF_S) &&
- ((UE->slot_rx&1)==0)) {
- phy_procedures_UE_RX(UE,0,0,UE->mode,no_relay,NULL);
+ if ((subframe_select( &UE->lte_frame_parms, UE->slot_rx>>1 ) == SF_S) &&
+ ((UE->slot_rx&1) == 0)) {
+ phy_procedures_UE_RX( UE, 0, 0, UE->mode, no_relay, NULL );
}
#ifdef OPENAIR2
@@ -740,19 +739,16 @@ static void *UE_thread_rx(void *arg)
0/*FIXME CC_id*/);
if (ret == CONNECTION_LOST) {
- LOG_E(PHY,"[UE %d] Frame %d, subframe %d RRC Connection lost, returning to PRACH\n",UE->Mod_id,
- UE->frame_rx,UE->slot_tx>>1);
+ LOG_E( PHY, "[UE %"PRIu8"] Frame %"PRIu32", subframe %u RRC Connection lost, returning to PRACH\n",
+ UE->Mod_id, UE->frame_rx, UE->slot_tx>>1 );
UE->UE_mode[0] = PRACH;
- // mac_xface->macphy_exit("Connection lost");
} else if (ret == PHY_RESYNCH) {
- LOG_E(PHY,"[UE %d] Frame %d, subframe %d RRC Connection lost, trying to resynch\n",
- UE->Mod_id,
- UE->frame_rx,UE->slot_tx>>1);
+ LOG_E( PHY, "[UE %"PRIu8"] Frame %"PRIu32", subframe %u RRC Connection lost, trying to resynch\n",
+ UE->Mod_id, UE->frame_rx, UE->slot_tx>>1 );
UE->UE_mode[0] = RESYNCH;
- // mac_xface->macphy_exit("Connection lost");
} else if (ret == PHY_HO_PRACH) {
- LOG_I(PHY,"[UE %d] Frame %d, subframe %d, return to PRACH and perform a contention-free access\n",
- UE->Mod_id,UE->frame_rx,UE->slot_tx>>1);
+ LOG_I( PHY, "[UE %"PRIu8"] Frame %"PRIu32", subframe %u, return to PRACH and perform a contention-free access\n",
+ UE->Mod_id, UE->frame_rx, UE->slot_tx>>1 );
UE->UE_mode[0] = PRACH;
}
}
@@ -760,31 +756,32 @@ static void *UE_thread_rx(void *arg)
#endif
UE->slot_rx++;
- if (UE->slot_rx==20) {
- UE->slot_rx=0;
+ if (UE->slot_rx == 20) {
+ UE->slot_rx = 0;
UE->frame_rx++;
- VCD_SIGNAL_DUMPER_DUMP_VARIABLE_BY_NAME(VCD_SIGNAL_DUMPER_VARIABLES_FRAME_NUMBER_RX_UE, UE->frame_rx);
+ VCD_SIGNAL_DUMPER_DUMP_VARIABLE_BY_NAME( VCD_SIGNAL_DUMPER_VARIABLES_FRAME_NUMBER_RX_UE, UE->frame_rx );
}
- VCD_SIGNAL_DUMPER_DUMP_VARIABLE_BY_NAME(VCD_SIGNAL_DUMPER_VARIABLES_SUBFRAME_NUMBER_RX_UE, UE->slot_rx>>1);
-
+ VCD_SIGNAL_DUMPER_DUMP_VARIABLE_BY_NAME( VCD_SIGNAL_DUMPER_VARIABLES_SUBFRAME_NUMBER_RX_UE, UE->slot_rx>>1 );
}
if (pthread_mutex_lock(&UE->mutex_rx) != 0) {
- printf("[openair][SCHED][eNB] error locking mutex for UE RX\n");
- } else {
- UE->instance_cnt_rx--;
-
- if (pthread_mutex_unlock(&UE->mutex_rx) != 0) {
- printf("[openair][SCHED][eNB] error unlocking mutex for UE RX\n");
- }
+ LOG_E( PHY, "[SCHED][UE] error locking mutex for UE RX\n" );
+ exit_fun("noting to add");
+ return &UE_thread_rx_retval;
}
- // printf("UE_thread_rx done\n");
+ UE->instance_cnt_rx--;
+
+ if (pthread_mutex_unlock(&UE->mutex_rx) != 0) {
+ LOG_E( PHY, "[SCHED][UE] error unlocking mutex for UE RX\n" );
+ exit_fun("noting to add");
+ return &UE_thread_rx_retval;
+ }
}
// thread finished
- return 0;
+ return &UE_thread_rx_retval;
}