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gnss-sdr/tests/system-tests/ttff.cc

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/*!
* \file ttff.cc
* \brief This class implements a test for measuring
* the Time-To-First-Fix
* \author Carles Fernandez-Prades, 2016. cfernandez(at)cttc.es
*
*
* -----------------------------------------------------------------------------
*
* GNSS-SDR is a Global Navigation Satellite System software-defined receiver.
* This file is part of GNSS-SDR.
*
* Copyright (C) 2010-2020 (see AUTHORS file for a list of contributors)
* SPDX-License-Identifier: GPL-3.0-or-later
*
* -----------------------------------------------------------------------------
*/
#include "concurrent_map.h"
#include "concurrent_queue.h"
#include "control_thread.h"
#include "file_configuration.h"
#include "gnss_flowgraph.h"
#include "gps_acq_assist.h"
#include "in_memory_configuration.h"
#include <boost/date_time/posix_time/posix_time.hpp>
#include <boost/exception/diagnostic_information.hpp>
#include <boost/exception/exception.hpp>
#include <gtest/gtest.h>
#include <cerrno>
#include <chrono>
#include <cmath>
#include <cstdint>
#include <limits>
#include <numeric>
#include <random>
#include <string>
#include <sys/ipc.h>
#include <sys/msg.h>
#include <sys/types.h>
#include <thread>
#if USE_GLOG_AND_GFLAGS
#include <gflags/gflags.h>
#include <glog/logging.h>
#if GFLAGS_OLD_NAMESPACE
namespace gflags
{
using namespace google;
}
#endif
#else
#include <absl/flags/flag.h>
#include <absl/flags/parse.h>
#include <absl/log/flags.h>
#include <absl/log/log.h>
#endif
#if USE_GLOG_AND_GFLAGS
DEFINE_int32(fs_in, 4000000, "Sampling rate, in Samples/s");
DEFINE_int32(max_measurement_duration, 90, "Maximum time waiting for a position fix, in seconds");
DEFINE_int32(num_measurements, 2, "Number of measurements");
DEFINE_string(device_address, "192.168.40.2", "USRP device IP address");
DEFINE_string(subdevice, "A:0", "USRP subdevice");
DEFINE_string(config_file_ttff, std::string(""), "File containing the configuration parameters for the TTFF test.");
#else
ABSL_FLAG(int32_t, fs_in, 4000000, "Sampling rate, in Samples/s");
ABSL_FLAG(int32_t, max_measurement_duration, 90, "Maximum time waiting for a position fix, in seconds");
ABSL_FLAG(int32_t, num_measurements, 2, "Number of measurements");
ABSL_FLAG(std::string, device_address, "192.168.40.2", "USRP device IP address");
ABSL_FLAG(std::string, subdevice, "A:0", "USRP subdevice");
ABSL_FLAG(std::string, config_file_ttff, std::string(""), "File containing the configuration parameters for the TTFF test.");
#endif
// For GPS NAVIGATION (L1)
Concurrent_Queue<Gps_Acq_Assist> global_gps_acq_assist_queue;
Concurrent_Map<Gps_Acq_Assist> global_gps_acq_assist_map;
std::vector<double> TTFF_v;
typedef struct
{
long mtype; // required by SysV message
double ttff;
} ttff_msgbuf;
class TtffTest : public ::testing::Test
{
public:
void config_1();
void config_2();
void print_TTFF_report(const std::vector<double> &ttff_v, const std::shared_ptr<ConfigurationInterface> &config_);
std::shared_ptr<InMemoryConfiguration> config;
std::shared_ptr<FileConfiguration> config2;
const double central_freq = 1575420000.0;
const double gain_dB = 40.0;
const int number_of_taps = 11;
const int number_of_bands = 2;
const float band1_begin = 0.0;
const float band1_end = 0.48;
const float band2_begin = 0.52;
const float band2_end = 1.0;
const float ampl1_begin = 1.0;
const float ampl1_end = 1.0;
const float ampl2_begin = 0.0;
const float ampl2_end = 0.0;
const float band1_error = 1.0;
const float band2_error = 1.0;
const int grid_density = 16;
const float zero = 0.0;
const int number_of_channels = 8;
const int in_acquisition = 1;
const float threshold = 0.01;
const float doppler_max = 8000.0;
const float doppler_step = 500.0;
const int max_dwells = 1;
const int tong_init_val = 2;
const int tong_max_val = 10;
const int tong_max_dwells = 30;
const int coherent_integration_time_ms = 1;
const float pll_bw_hz = 30.0;
const float dll_bw_hz = 4.0;
const float early_late_space_chips = 0.5;
const int display_rate_ms = 500;
const int output_rate_ms = 100;
const int averaging_depth = 10;
};
void TtffTest::config_1()
{
config = std::make_shared<InMemoryConfiguration>();
#if USE_GLOG_AND_GFLAGS
config->set_property("GNSS-SDR.internal_fs_sps", std::to_string(FLAGS_fs_in));
#else
#endif
// Set the assistance system parameters
config->set_property("GNSS-SDR.SUPL_gps_ephemeris_server", "supl.google.com");
config->set_property("GNSS-SDR.SUPL_gps_ephemeris_port", std::to_string(7275));
config->set_property("GNSS-SDR.SUPL_gps_acquisition_server", "supl.google.com");
config->set_property("GNSS-SDR.SUPL_gps_acquisition_port", std::to_string(7275));
config->set_property("GNSS-SDR.SUPL_MCC", std::to_string(244));
config->set_property("GNSS-SDR.SUPL_MNC", std::to_string(5));
config->set_property("GNSS-SDR.SUPL_LAC", "0x59e2");
config->set_property("GNSS-SDR.SUPL_CI", "0x31b0");
// Set the Signal Source
config->set_property("SignalSource.item_type", "cshort");
config->set_property("SignalSource.implementation", "UHD_Signal_Source");
config->set_property("SignalSource.freq", std::to_string(central_freq));
config->set_property("SignalSource.gain", std::to_string(gain_dB));
#if USE_GLOG_AND_GFLAGS
config->set_property("SignalSource.sampling_frequency", std::to_string(FLAGS_fs_in));
config->set_property("SignalSource.subdevice", FLAGS_subdevice);
config->set_property("SignalSource.samples", std::to_string(FLAGS_fs_in * FLAGS_max_measurement_duration));
config->set_property("SignalSource.device_address", FLAGS_device_address);
#else
#endif
// Set the Signal Conditioner
config->set_property("SignalConditioner.implementation", "Signal_Conditioner");
config->set_property("DataTypeAdapter.implementation", "Pass_Through");
config->set_property("DataTypeAdapter.item_type", "cshort");
config->set_property("InputFilter.implementation", "Fir_Filter");
config->set_property("InputFilter.dump", "false");
config->set_property("InputFilter.input_item_type", "cshort");
config->set_property("InputFilter.output_item_type", "gr_complex");
config->set_property("InputFilter.taps_item_type", "float");
config->set_property("InputFilter.number_of_taps", std::to_string(number_of_taps));
config->set_property("InputFilter.number_of_bands", std::to_string(number_of_bands));
config->set_property("InputFilter.band1_begin", std::to_string(band1_begin));
config->set_property("InputFilter.band1_end", std::to_string(band1_end));
config->set_property("InputFilter.band2_begin", std::to_string(band2_begin));
config->set_property("InputFilter.band2_end", std::to_string(band2_end));
config->set_property("InputFilter.ampl1_begin", std::to_string(ampl1_begin));
config->set_property("InputFilter.ampl1_end", std::to_string(ampl1_end));
config->set_property("InputFilter.ampl2_begin", std::to_string(ampl2_begin));
config->set_property("InputFilter.ampl2_end", std::to_string(ampl2_end));
config->set_property("InputFilter.band1_error", std::to_string(band1_error));
config->set_property("InputFilter.band2_error", std::to_string(band2_error));
config->set_property("InputFilter.filter_type", "bandpass");
config->set_property("InputFilter.grid_density", std::to_string(grid_density));
#if USE_GLOG_AND_GFLAGS
config->set_property("InputFilter.sampling_frequency", std::to_string(FLAGS_fs_in));
#else
#endif
config->set_property("InputFilter.IF", std::to_string(zero));
config->set_property("Resampler.implementation", "Pass_Through");
config->set_property("Resampler.dump", "false");
config->set_property("Resampler.item_type", "gr_complex");
#if USE_GLOG_AND_GFLAGS
config->set_property("Resampler.sample_freq_in", std::to_string(FLAGS_fs_in));
config->set_property("Resampler.sample_freq_out", std::to_string(FLAGS_fs_in));
#else
#endif
// Set the number of Channels
config->set_property("Channels_1C.count", std::to_string(number_of_channels));
config->set_property("Channels.in_acquisition", std::to_string(in_acquisition));
config->set_property("Channel.signal", "1C");
// Set Acquisition
config->set_property("Acquisition_1C.implementation", "GPS_L1_CA_PCPS_Tong_Acquisition");
config->set_property("Acquisition_1C.item_type", "gr_complex");
config->set_property("Acquisition_1C.coherent_integration_time_ms", std::to_string(coherent_integration_time_ms));
config->set_property("Acquisition_1C.threshold", std::to_string(threshold));
config->set_property("Acquisition_1C.doppler_max", std::to_string(doppler_max));
config->set_property("Acquisition_1C.doppler_step", std::to_string(doppler_step));
config->set_property("Acquisition_1C.bit_transition_flag", "false");
config->set_property("Acquisition_1C.max_dwells", std::to_string(max_dwells));
config->set_property("Acquisition_1C.tong_init_val", std::to_string(tong_init_val));
config->set_property("Acquisition_1C.tong_max_val", std::to_string(tong_max_val));
config->set_property("Acquisition_1C.tong_max_dwells", std::to_string(tong_max_dwells));
// Set Tracking
config->set_property("Tracking_1C.implementation", "GPS_L1_CA_DLL_PLL_Tracking");
config->set_property("Tracking_1C.item_type", "gr_complex");
config->set_property("Tracking_1C.dump", "false");
config->set_property("Tracking_1C.dump_filename", "./tracking_ch_");
config->set_property("Tracking_1C.pll_bw_hz", std::to_string(pll_bw_hz));
config->set_property("Tracking_1C.dll_bw_hz", std::to_string(dll_bw_hz));
config->set_property("Tracking_1C.early_late_space_chips", std::to_string(early_late_space_chips));
// Set Telemetry
config->set_property("TelemetryDecoder_1C.implementation", "GPS_L1_CA_Telemetry_Decoder");
config->set_property("TelemetryDecoder_1C.dump", "false");
// Set Observables
config->set_property("Observables.implementation", "Hybrid_Observables");
config->set_property("Observables.dump", "false");
config->set_property("Observables.dump_filename", "./observables.dat");
// Set PVT
config->set_property("PVT.implementation", "RTKLIB_PVT");
config->set_property("PVT.positioning_mode", "Single");
config->set_property("PVT.output_rate_ms", std::to_string(output_rate_ms));
config->set_property("PVT.display_rate_ms", std::to_string(display_rate_ms));
config->set_property("PVT.dump_filename", "./PVT");
config->set_property("PVT.nmea_dump_filename", "./gnss_sdr_pvt.nmea");
config->set_property("PVT.flag_nmea_tty_port", "false");
config->set_property("PVT.nmea_dump_devname", "/dev/pts/4");
config->set_property("PVT.flag_rtcm_server", "false");
config->set_property("PVT.flag_rtcm_tty_port", "false");
config->set_property("PVT.rtcm_dump_devname", "/dev/pts/1");
config->set_property("PVT.dump", "false");
}
void TtffTest::config_2()
{
#if USE_GLOG_AND_GFLAGS
if (FLAGS_config_file_ttff.empty())
{
std::string path = std::string(TEST_PATH);
std::string filename = path + "../../conf/gnss-sdr_GPS_L1_USRP_X300_realtime.conf";
config2 = std::make_shared<FileConfiguration>(filename);
}
else
{
config2 = std::make_shared<FileConfiguration>(FLAGS_config_file_ttff);
}
int d_sampling_rate;
d_sampling_rate = config2->property("GNSS-SDR.internal_fs_sps", FLAGS_fs_in);
config2->set_property("SignalSource.samples", std::to_string(d_sampling_rate * FLAGS_max_measurement_duration));
#else
#endif
}
void receive_msg()
{
ttff_msgbuf msg;
ttff_msgbuf msg_stop;
msg_stop.mtype = 1;
msg_stop.ttff = -200.0;
double ttff_msg = 0.0;
int msgrcv_size = sizeof(msg.ttff);
int msqid;
int msqid_stop = -1;
key_t key = 1101;
key_t key_stop = 1102;
bool leave = false;
while (!leave)
{
// wait for the queue to be created
while ((msqid = msgget(key, 0644)) == -1)
{
}
if (msgrcv(msqid, &msg, msgrcv_size, 1, 0) != -1)
{
ttff_msg = msg.ttff;
if ((ttff_msg != 0) && (ttff_msg != -1))
{
TTFF_v.push_back(ttff_msg);
LOG(INFO) << "Valid Time-To-First-Fix: " << ttff_msg << "[s]";
// Stop the receiver
while (((msqid_stop = msgget(key_stop, 0644))) == -1)
{
}
double msgsend_size = sizeof(msg_stop.ttff);
msgsnd(msqid_stop, &msg_stop, msgsend_size, IPC_NOWAIT);
}
if (std::abs(ttff_msg - (-1.0)) < 10 * std::numeric_limits<double>::epsilon())
{
leave = true;
}
}
}
}
void TtffTest::print_TTFF_report(const std::vector<double> &ttff_v, const std::shared_ptr<ConfigurationInterface> &config_)
{
std::ofstream ttff_report_file;
std::string filename = "ttff_report";
std::string filename_;
boost::posix_time::ptime pt = boost::posix_time::second_clock::local_time();
tm timeinfo = boost::posix_time::to_tm(pt);
std::stringstream strm0;
const int year = timeinfo.tm_year - 100;
strm0 << year;
const int month = timeinfo.tm_mon + 1;
if (month < 10)
{
strm0 << "0";
}
strm0 << month;
const int day = timeinfo.tm_mday;
if (day < 10)
{
strm0 << "0";
}
strm0 << day << "_";
const int hour = timeinfo.tm_hour;
if (hour < 10)
{
strm0 << "0";
}
strm0 << hour;
const int min = timeinfo.tm_min;
if (min < 10)
{
strm0 << "0";
}
strm0 << min;
const int sec = timeinfo.tm_sec;
if (sec < 10)
{
strm0 << "0";
}
strm0 << sec;
filename_ = filename + "_" + strm0.str() + ".txt";
ttff_report_file.open(filename_.c_str());
std::vector<double> ttff = ttff_v;
bool read_ephemeris;
bool false_bool = false;
read_ephemeris = config_->property("GNSS-SDR.SUPL_read_gps_assistance_xml", false_bool);
bool agnss;
agnss = config_->property("GNSS-SDR.SUPL_gps_enabled", false_bool);
double sum = std::accumulate(ttff.begin(), ttff.end(), 0.0);
double mean = sum / ttff.size();
double sq_sum = std::inner_product(ttff.begin(), ttff.end(), ttff.begin(), 0.0);
double stdev = std::sqrt(sq_sum / ttff.size() - mean * mean);
auto max_ttff = std::max_element(std::begin(ttff), std::end(ttff));
auto min_ttff = std::min_element(std::begin(ttff), std::end(ttff));
std::string source;
std::string default_str = "default";
source = config_->property("SignalSource.implementation", default_str);
std::stringstream stm;
stm << "---------------------------\n";
stm << " Time-To-First-Fix Report\n";
stm << "---------------------------\n";
stm << "Initial receiver status: ";
if (read_ephemeris)
{
stm << "Hot start.\n";
}
else
{
stm << "Cold start.\n";
}
stm << "A-GNSS: ";
if (agnss && read_ephemeris)
{
stm << "Enabled.\n";
}
else
{
stm << "Disabled.\n";
}
#if USE_GLOG_AND_GFLAGS
stm << "Valid measurements (" << ttff.size() << "/" << FLAGS_num_measurements << "): ";
#else
stm << "Valid measurements (" << ttff.size() << "/" << absl::GetFlag(FLAGS_num_measurements) << "): ";
#endif
for (double ttff_ : ttff)
{
stm << ttff_ << " ";
}
stm << '\n';
stm << "TTFF mean: " << mean << " [s]\n";
if (!ttff.empty())
{
stm << "TTFF max: " << *max_ttff << " [s]\n";
stm << "TTFF min: " << *min_ttff << " [s]\n";
}
stm << "TTFF stdev: " << stdev << " [s]\n";
stm << "Operating System: " << std::string(HOST_SYSTEM) << '\n';
stm << "Navigation mode: "
<< "3D\n";
if (source != "UHD_Signal_Source")
{
stm << "Source: File\n";
}
else
{
stm << "Source: Live\n";
}
stm << "---------------------------\n";
std::cout << stm.rdbuf();
if (ttff_report_file.is_open())
{
ttff_report_file << stm.str();
ttff_report_file.close();
}
}
TEST_F(TtffTest /*unused*/, ColdStart /*unused*/)
{
unsigned int num_measurements = 0;
config_1();
// Ensure Cold Start
config->set_property("GNSS-SDR.SUPL_gps_enabled", "false");
config->set_property("GNSS-SDR.SUPL_read_gps_assistance_xml", "false");
config_2();
// Ensure Cold Start
config2->set_property("GNSS-SDR.SUPL_gps_enabled", "false");
config2->set_property("GNSS-SDR.SUPL_read_gps_assistance_xml", "false");
config2->set_property("PVT.flag_rtcm_server", "false");
#if USE_GLOG_AND_GFLAGS
for (int n = 0; n < FLAGS_num_measurements; n++)
#else
for (int n = 0; n < absl::GetFlag(FLAGS_num_measurements); n++)
#endif
{
// Create a new ControlThread object with a smart pointer
std::shared_ptr<ControlThread> control_thread;
#if USE_GLOG_AND_GFLAGS
if (FLAGS_config_file_ttff.empty())
#else
if (absl::GetFlag(FLAGS_config_file_ttff).empty())
#endif
{
control_thread = std::make_shared<ControlThread>(config);
}
else
{
control_thread = std::make_shared<ControlThread>(config2);
}
// record startup time
#if USE_GLOG_AND_GFLAGS
std::cout << "Starting measurement " << num_measurements + 1 << " / " << FLAGS_num_measurements << '\n';
#else
std::cout << "Starting measurement " << num_measurements + 1 << " / " << absl::GetFlag(FLAGS_num_measurements) << '\n';
#endif
std::chrono::time_point<std::chrono::system_clock> start;
std::chrono::time_point<std::chrono::system_clock> end;
start = std::chrono::system_clock::now();
// start receiver
try
{
control_thread->run();
}
catch (const boost::exception &e)
{
std::cout << "Boost exception: " << boost::diagnostic_information(e);
}
catch (const std::exception &ex)
{
std::cout << "STD exception: " << ex.what();
}
// stop clock
end = std::chrono::system_clock::now();
std::chrono::duration<double> elapsed_seconds = end - start;
double ttff = elapsed_seconds.count();
std::shared_ptr<GNSSFlowgraph> flowgraph = control_thread->flowgraph();
EXPECT_FALSE(flowgraph->running());
num_measurements = num_measurements + 1;
std::cout << "Just finished measurement " << num_measurements << ", which took " << ttff << " seconds.\n";
#if USE_GLOG_AND_GFLAGS
if (n < FLAGS_num_measurements - 1)
#else
if (n < absl::GetFlag(FLAGS_num_measurements) - 1)
#endif
{
std::random_device r;
std::default_random_engine e1(r());
std::uniform_real_distribution<float> uniform_dist(0, 1);
float random_variable_0_1 = uniform_dist(e1);
int random_delay_s = static_cast<int>(random_variable_0_1 * 25.0);
std::cout << "Waiting a random amount of time (from 5 to 30 s) to start a new measurement... \n";
std::cout << "This time will wait " << random_delay_s + 5 << " s.\n"
<< '\n';
std::this_thread::sleep_until(std::chrono::system_clock::now() + std::chrono::seconds(5) + std::chrono::seconds(random_delay_s));
}
}
// Print TTFF report
#if USE_GLOG_AND_GFLAGS
if (FLAGS_config_file_ttff.empty())
#else
if (absl::GetFlag(FLAGS_config_file_ttff).empty())
#endif
{
print_TTFF_report(TTFF_v, config);
}
else
{
print_TTFF_report(TTFF_v, config2);
}
std::this_thread::sleep_until(std::chrono::system_clock::now() + std::chrono::seconds(5)); // let the USRP some time to rest before the next test
}
TEST_F(TtffTest /*unused*/, HotStart /*unused*/)
{
unsigned int num_measurements = 0;
TTFF_v.clear();
config_1();
// Ensure Hot Start
config->set_property("GNSS-SDR.SUPL_gps_enabled", "true");
config->set_property("GNSS-SDR.SUPL_read_gps_assistance_xml", "true");
config_2();
// Ensure Hot Start
config2->set_property("GNSS-SDR.SUPL_gps_enabled", "true");
config2->set_property("GNSS-SDR.SUPL_read_gps_assistance_xml", "true");
config2->set_property("PVT.flag_rtcm_server", "false");
#if USE_GLOG_AND_GFLAGS
for (int n = 0; n < FLAGS_num_measurements; n++)
#else
for (int n = 0; n < absl::GetFlag(FLAGS_num_measurements); n++)
#endif
{
// Create a new ControlThread object with a smart pointer
std::shared_ptr<ControlThread> control_thread;
#if USE_GLOG_AND_GFLAGS
if (FLAGS_config_file_ttff.empty())
#else
if (absl::GetFlag(FLAGS_config_file_ttff).empty())
#endif
{
control_thread = std::make_shared<ControlThread>(config);
}
else
{
control_thread = std::make_shared<ControlThread>(config2);
}
// record startup time
#if USE_GLOG_AND_GFLAGS
std::cout << "Starting measurement " << num_measurements + 1 << " / " << FLAGS_num_measurements << '\n';
#else
std::cout << "Starting measurement " << num_measurements + 1 << " / " << absl::GetFlag(FLAGS_num_measurements) << '\n';
#endif
std::chrono::time_point<std::chrono::system_clock> start;
std::chrono::time_point<std::chrono::system_clock> end;
start = std::chrono::system_clock::now();
// start receiver
try
{
control_thread->run();
}
catch (const boost::exception &e)
{
std::cout << "Boost exception: " << boost::diagnostic_information(e);
}
catch (const std::exception &ex)
{
std::cout << "STD exception: " << ex.what();
}
// stop clock
end = std::chrono::system_clock::now();
std::chrono::duration<double> elapsed_seconds = end - start;
double ttff = elapsed_seconds.count();
std::shared_ptr<GNSSFlowgraph> flowgraph = control_thread->flowgraph();
EXPECT_FALSE(flowgraph->running());
num_measurements = num_measurements + 1;
std::cout << "Just finished measurement " << num_measurements << ", which took " << ttff << " seconds.\n";
#if USE_GLOG_AND_GFLAGS
if (n < FLAGS_num_measurements - 1)
#else
if (n < absl::GetFlag(FLAGS_num_measurements) - 1)
#endif
{
std::random_device r;
std::default_random_engine e1(r());
std::uniform_real_distribution<float> uniform_dist(0, 1);
float random_variable_0_1 = uniform_dist(e1);
int random_delay_s = static_cast<int>(random_variable_0_1 * 25.0);
std::cout << "Waiting a random amount of time (from 5 to 30 s) to start new measurement... \n";
std::cout << "This time will wait " << random_delay_s + 5 << " s.\n"
<< '\n';
std::this_thread::sleep_until(std::chrono::system_clock::now() + std::chrono::seconds(5) + std::chrono::seconds(random_delay_s));
}
}
// Print TTFF report
#if USE_GLOG_AND_GFLAGS
if (FLAGS_config_file_ttff.empty())
#else
if (absl::GetFlag(FLAGS_config_file_ttff).empty())
#endif
{
print_TTFF_report(TTFF_v, config);
}
else
{
print_TTFF_report(TTFF_v, config2);
}
}
int main(int argc, char **argv)
{
std::cout << "Running Time-To-First-Fix test...\n";
int res = 0;
TTFF_v.clear();
try
{
testing::InitGoogleTest(&argc, argv);
}
catch (...)
{
} // catch the "testing::internal::<unnamed>::ClassUniqueToAlwaysTrue" from gtest
#if USE_GLOG_AND_GFLAGS
gflags::ParseCommandLineFlags(&argc, &argv, true);
google::InitGoogleLogging(argv[0]);
#else
absl::ParseCommandLine(argc, argv);
#endif
// Start queue thread
std::thread receive_msg_thread(receive_msg);
// Run the Tests
try
{
res = RUN_ALL_TESTS();
}
catch (...)
{
LOG(WARNING) << "Unexpected catch";
}
// Terminate the queue thread
key_t sysv_msg_key;
int sysv_msqid;
sysv_msg_key = 1101;
int msgflg = IPC_CREAT | 0666;
if ((sysv_msqid = msgget(sysv_msg_key, msgflg)) == -1)
{
std::cout << "GNSS-SDR can not create message queues!\n";
return 1;
}
ttff_msgbuf msg;
msg.mtype = 1;
msg.ttff = -1;
int msgsend_size;
msgsend_size = sizeof(msg.ttff);
msgsnd(sysv_msqid, &msg, msgsend_size, IPC_NOWAIT);
receive_msg_thread.join();
msgctl(sysv_msqid, IPC_RMID, nullptr);
#if USE_GLOG_AND_GFLAGS
gflags::ShutDownCommandLineFlags();
#endif
return res;
}
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