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102 lines
3.1 KiB
C++
102 lines
3.1 KiB
C++
/**
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* Copyright 2013-2021 Software Radio Systems Limited
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*
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* This file is part of srsRAN.
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*
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* srsRAN is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as
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* published by the Free Software Foundation, either version 3 of
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* the License, or (at your option) any later version.
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*
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* srsRAN is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* A copy of the GNU Affero General Public License can be found in
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* the LICENSE file in the top-level directory of this distribution
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* and at http://www.gnu.org/licenses/.
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*
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*/
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#ifndef SRSRAN_PHY_COMMON_INTERFACE_H
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#define SRSRAN_PHY_COMMON_INTERFACE_H
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#include "../radio/rf_buffer.h"
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#include "../radio/rf_timestamp.h"
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namespace srsran {
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/**
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* @brief Describes a physical layer common interface
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*/
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class phy_common_interface
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{
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private:
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std::mutex tx_mutex; ///< Protect Tx attributes
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std::condition_variable tx_cvar; ///< Tx condition variable
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bool tx_hold = false; ///< Hold threads until the signal is transmitted
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protected:
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void reset_last_worker()
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{
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std::unique_lock<std::mutex> lock(tx_mutex);
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tx_hold = true;
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}
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/**
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* @brief Waits for the last worker to call `last_worker()` to prevent that the current SF worker is released and
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* overwrites the transmit signal prior transmission
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*/
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void wait_last_worker()
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{
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std::unique_lock<std::mutex> lock(tx_mutex);
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while (tx_hold) {
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tx_cvar.wait(lock);
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}
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}
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/**
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* @brief Notifies the last SF worker transmitted the baseband and all the workers waiting are released
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*/
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void last_worker()
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{
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std::unique_lock<std::mutex> lock(tx_mutex);
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tx_hold = false;
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tx_cvar.notify_all();
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}
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public:
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/**
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* @brief Describes a worker context
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*/
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struct worker_context_t {
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uint32_t sf_idx = 0; ///< Subframe index
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void* worker_ptr = nullptr; ///< Worker pointer for wait/release semaphore
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bool last = false; ///< Indicates this worker is the last one in the sub-frame processing
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srsran::rf_timestamp_t tx_time = {}; ///< Transmit time, used only by last worker
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void copy(const worker_context_t& other)
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{
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sf_idx = other.sf_idx;
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worker_ptr = other.worker_ptr;
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last = other.last;
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tx_time.copy(other.tx_time);
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}
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worker_context_t() = default;
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worker_context_t(const worker_context_t& other) { copy(other); }
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};
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/**
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* @brief Common PHY interface for workers to indicate they ended
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* @param w_ctx Worker context
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* @param tx_enable Indicates whether the buffer has baseband samples to transmit
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* @param buffer Baseband buffer
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*/
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virtual void worker_end(const worker_context_t& w_ctx, const bool& tx_enable, srsran::rf_buffer_t& buffer) = 0;
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};
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} // namespace srsran
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#endif // SRSRAN_PHY_COMMON_INTERFACE_H
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