107 lines
2.8 KiB
C++
107 lines
2.8 KiB
C++
/*
|
|
* Copyright 2013-2019 Software Radio Systems Limited
|
|
*
|
|
* This file is part of srsLTE.
|
|
*
|
|
* srsLTE is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU Affero General Public License as
|
|
* published by the Free Software Foundation, either version 3 of
|
|
* the License, or (at your option) any later version.
|
|
*
|
|
* srsLTE is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU Affero General Public License for more details.
|
|
*
|
|
* A copy of the GNU Affero General Public License can be found in
|
|
* the LICENSE file in the top-level directory of this distribution
|
|
* and at http://www.gnu.org/licenses/.
|
|
*
|
|
*/
|
|
|
|
/******************************************************************************
|
|
* File: rlc_tx_queue.h
|
|
* Description: Queue used in RLC TM/UM/AM TX queues.
|
|
* Uses a blocking queue with bounded capacity to block higher layers
|
|
* when pushing Uplink traffic
|
|
* Reference:
|
|
*****************************************************************************/
|
|
|
|
#ifndef SRSLTE_MSG_QUEUE_H
|
|
#define SRSLTE_MSG_QUEUE_H
|
|
|
|
#include "srslte/common/block_queue.h"
|
|
#include "srslte/common/common.h"
|
|
#include <pthread.h>
|
|
|
|
namespace srslte {
|
|
|
|
class rlc_tx_queue : public block_queue<unique_byte_buffer>::call_mutexed_itf
|
|
{
|
|
public:
|
|
rlc_tx_queue(int capacity = 128) : queue(capacity) {
|
|
unread_bytes = 0;
|
|
queue.set_mutexed_itf(this);
|
|
}
|
|
// increase/decrease unread_bytes inside push/pop mutexed operations
|
|
void pushing(const unique_byte_buffer& msg) final { unread_bytes += msg->N_bytes; }
|
|
void popping(const unique_byte_buffer& msg) final
|
|
{
|
|
if (unread_bytes > msg->N_bytes) {
|
|
unread_bytes -= msg->N_bytes;
|
|
} else {
|
|
unread_bytes = 0;
|
|
}
|
|
}
|
|
void write(unique_byte_buffer msg) { queue.push(std::move(msg)); }
|
|
|
|
bool try_write(unique_byte_buffer msg) { return queue.try_push(std::move(msg)); }
|
|
|
|
void read(unique_byte_buffer* msg) { *msg = std::move(queue.wait_pop()); }
|
|
|
|
bool try_read(unique_byte_buffer* msg) { return queue.try_pop(msg); }
|
|
|
|
void resize(uint32_t capacity)
|
|
{
|
|
queue.resize(capacity);
|
|
}
|
|
uint32_t size()
|
|
{
|
|
return (uint32_t) queue.size();
|
|
}
|
|
|
|
uint32_t size_bytes()
|
|
{
|
|
return unread_bytes;
|
|
}
|
|
|
|
uint32_t size_tail_bytes()
|
|
{
|
|
if (!queue.empty()) {
|
|
unique_byte_buffer& m = queue.front();
|
|
if (m.get()) {
|
|
return m->N_bytes;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
// This is a hack to reset N_bytes counter when queue is corrupted (see line 89)
|
|
void reset() {
|
|
unread_bytes = 0;
|
|
}
|
|
|
|
bool is_empty() {
|
|
return queue.empty();
|
|
}
|
|
|
|
private:
|
|
block_queue<unique_byte_buffer> queue;
|
|
uint32_t unread_bytes;
|
|
};
|
|
|
|
} // namespace srslte
|
|
|
|
|
|
#endif // SRSLTE_MSG_QUEUE_H
|