mirror of https://github.com/pvnis/srsRAN_4G.git
You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
76 lines
2.0 KiB
C++
76 lines
2.0 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/.
|
|
*
|
|
*/
|
|
|
|
#include <assert.h>
|
|
#include <condition_variable>
|
|
#include <deque>
|
|
#include <inttypes.h>
|
|
#include <mutex>
|
|
|
|
#ifndef SRSLTE_TTI_SEMPAHORE_H_
|
|
#define SRSLTE_TTI_SEMPAHORE_H_
|
|
|
|
namespace srslte {
|
|
template <class T>
|
|
class tti_semaphore
|
|
{
|
|
private:
|
|
const uint32_t max_timeout_ms = 60000; // 1 minute
|
|
std::mutex mutex;
|
|
std::condition_variable cvar;
|
|
std::deque<T> fifo;
|
|
|
|
public:
|
|
void wait(T id)
|
|
{
|
|
bool expired = false;
|
|
std::unique_lock<std::mutex> lock(mutex);
|
|
std::chrono::system_clock::time_point expire_time = std::chrono::system_clock::now();
|
|
expire_time += std::chrono::milliseconds(max_timeout_ms);
|
|
|
|
while (!fifo.empty() && fifo.front() != id && !expired) {
|
|
expired = (cvar.wait_until(lock, expire_time) == std::cv_status::timeout);
|
|
}
|
|
|
|
if (expired) {
|
|
perror("TTI semaphore wait timeout");
|
|
}
|
|
}
|
|
|
|
void push(T id)
|
|
{
|
|
std::unique_lock<std::mutex> lock(mutex);
|
|
fifo.push_back(id);
|
|
}
|
|
|
|
void release()
|
|
{
|
|
std::unique_lock<std::mutex> lock(mutex);
|
|
fifo.pop_front();
|
|
cvar.notify_all();
|
|
}
|
|
|
|
void wait_all() { wait(-1); }
|
|
};
|
|
} // namespace srslte
|
|
|
|
#endif // SRSLTE_TTI_SEMPAHORE_H_
|