Deprecated tbb::task_scheduler_init replaced with std::thread and tbb::global_control

unit_tests/contractor/graph_contractor.cpp

@@ -6,7 +6,12 @@
 #include <boost/test/test_case_template.hpp>
 #include <boost/test/unit_test.hpp>
 
+#include <tbb/tbb_stddef.h> // For version lookup
+#if TBB_VERSION_MAJOR == 2020
+#include <tbb/global_control.h>
+#else
 #include <tbb/task_scheduler_init.h>
+#endif
 
 using namespace osrm;
 using namespace osrm::contractor;
@@ -16,7 +21,11 @@ BOOST_AUTO_TEST_SUITE(graph_contractor)
 
 BOOST_AUTO_TEST_CASE(contract_graph)
 {
+#if TBB_VERSION_MAJOR == 2020
+    tbb::global_control scheduler(tbb::global_control::max_allowed_parallelism, 1);
+#else
     tbb::task_scheduler_init scheduler(1);
+#endif
     /*
      *                 <--1--<
      * (0) >--3--> (1) >--3--> (3)

unit_tests/library/contract.cpp

@@ -4,7 +4,7 @@
 #include "osrm/contractor.hpp"
 #include "osrm/contractor_config.hpp"
 
-#include <tbb/task_scheduler_init.h> // default_num_threads
+#include <thread>
 
 BOOST_AUTO_TEST_SUITE(library_contract)
 
@@ -13,7 +13,7 @@ BOOST_AUTO_TEST_CASE(test_contract_with_invalid_config)
     using namespace osrm;
 
     osrm::ContractorConfig config;
-    config.requested_num_threads = tbb::task_scheduler_init::default_num_threads();
+    config.requested_num_threads = std::thread::hardware_concurrency();
     BOOST_CHECK_THROW(osrm::contract(config),
                       std::exception); // including osrm::util::exception, etc.
 }

unit_tests/library/customize.cpp

@@ -4,7 +4,7 @@
 #include "osrm/customizer.hpp"
 #include "osrm/customizer_config.hpp"
 
-#include <tbb/task_scheduler_init.h> // default_num_threads
+#include <thread>
 
 BOOST_AUTO_TEST_SUITE(library_customize)
 
@@ -13,7 +13,7 @@ BOOST_AUTO_TEST_CASE(test_customize_with_invalid_config)
     using namespace osrm;
 
     osrm::CustomizationConfig config;
-    config.requested_num_threads = tbb::task_scheduler_init::default_num_threads();
+    config.requested_num_threads = std::thread::hardware_concurrency();
     BOOST_CHECK_THROW(osrm::customize(config),
                       std::exception); // including osrm::util::exception, etc.
 }

unit_tests/library/extract.cpp

@@ -4,14 +4,14 @@
 #include "osrm/extractor.hpp"
 #include "osrm/extractor_config.hpp"
 
-#include <tbb/task_scheduler_init.h> // default_num_threads
+#include <thread>
 
 BOOST_AUTO_TEST_SUITE(library_extract)
 
 BOOST_AUTO_TEST_CASE(test_extract_with_invalid_config)
 {
     osrm::ExtractorConfig config;
-    config.requested_num_threads = tbb::task_scheduler_init::default_num_threads();
+    config.requested_num_threads = std::thread::hardware_concurrency();
     BOOST_CHECK_THROW(osrm::extract(config),
                       std::exception); // including osrm::util::exception, osmium::io_error, etc.
 }
@@ -21,7 +21,7 @@ BOOST_AUTO_TEST_CASE(test_extract_with_valid_config)
     osrm::ExtractorConfig config;
     config.input_path = OSRM_TEST_DATA_DIR "/monaco.osm.pbf";
     config.UseDefaultOutputNames(OSRM_TEST_DATA_DIR "/monaco.osm.pbf");
-    config.requested_num_threads = tbb::task_scheduler_init::default_num_threads();
+    config.requested_num_threads = std::thread::hardware_concurrency();
     BOOST_CHECK_NO_THROW(osrm::extract(config));
 }
 

unit_tests/library/partition.cpp

@@ -4,7 +4,7 @@
 #include "osrm/partitioner.hpp"
 #include "osrm/partitioner_config.hpp"
 
-#include <tbb/task_scheduler_init.h> // default_num_threads
+#include <thread>
 
 BOOST_AUTO_TEST_SUITE(library_partition)
 
@@ -13,7 +13,7 @@ BOOST_AUTO_TEST_CASE(test_partition_with_invalid_config)
     using namespace osrm;
 
     osrm::PartitionerConfig config;
-    config.requested_num_threads = tbb::task_scheduler_init::default_num_threads();
+    config.requested_num_threads = std::thread::hardware_concurrency();
     BOOST_CHECK_THROW(osrm::partition(config),
                       std::exception); // including osrm::util::exception, etc.
 }

unit_tests/partitioner/recursive_bisection.cpp

@@ -9,8 +9,13 @@
 #include <boost/test/unit_test.hpp>
 
 // make sure not to leak in recursive bisection
+#if TBB_VERSION_MAJOR == 2020
+#include <tbb/global_control.h>
+tbb::global_control scheduler(tbb::global_control::max_allowed_parallelism, 2);
+#else
 #include <tbb/task_scheduler_init.h>
 tbb::task_scheduler_init init(2);
+#endif
 
 using namespace osrm::partitioner;
 using namespace osrm::util;

unit_tests/util/static_rtree.cpp

@@ -26,10 +26,14 @@
 #include <utility>
 #include <vector>
 
-#include <tbb/task_scheduler_init.h>
-
 // explicit TBB scheduler init to register resources cleanup at exit
+#if TBB_VERSION_MAJOR == 2020
+#include <tbb/global_control.h>
+tbb::global_control scheduler(tbb::global_control::max_allowed_parallelism, 2);
+#else
+#include <tbb/task_scheduler_init.h>
 tbb::task_scheduler_init init(2);
+#endif
 
 BOOST_AUTO_TEST_SUITE(static_rtree)