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// This file is part of OpenCV project.
// It is subject to the license terms in the LICENSE file found in the top-level directory
// of this distribution and at http://opencv.org/license.html.
// This is .hpp file included from test_utils.cpp
#include <thread> // std::thread
#include "opencv2/core/utils/tls.hpp"
namespace opencv_test { namespace {
class TLSReporter
{
public:
static int g_last_id;
static int g_allocated;
int id;
TLSReporter()
{
id = CV_XADD(&g_last_id, 1);
CV_XADD(&g_allocated, 1);
}
~TLSReporter()
{
CV_XADD(&g_allocated, -1);
}
};
int TLSReporter::g_last_id = 0;
int TLSReporter::g_allocated = 0;
template<typename T>
static void callNThreadsWithTLS(int N, TLSData<T>& tls)
{
std::vector<std::thread> threads(N);
for (int i = 0; i < N; i++)
{
threads[i] = std::thread([&]() {
TLSReporter* pData = tls.get();
(void)pData;
});
}
for (int i = 0; i < N; i++)
{
threads[i].join();
}
threads.clear();
}
TEST(Core_TLS, HandleThreadTermination)
{
const int init_id = TLSReporter::g_last_id;
const int init_allocated = TLSReporter::g_allocated;
const int N = 4;
TLSData<TLSReporter> tls;
// use TLS
ASSERT_NO_THROW(callNThreadsWithTLS(N, tls));
EXPECT_EQ(init_id + N, TLSReporter::g_last_id);
EXPECT_EQ(init_allocated + 0, TLSReporter::g_allocated);
}
static void testTLSAccumulator(bool detachFirst)
{
const int init_id = TLSReporter::g_last_id;
const int init_allocated = TLSReporter::g_allocated;
const int N = 4;
TLSDataAccumulator<TLSReporter> tls;
{ // empty TLS checks
std::vector<TLSReporter*>& data0 = tls.detachData();
EXPECT_EQ((size_t)0, data0.size());
tls.cleanupDetachedData();
}
// use TLS
ASSERT_NO_THROW(callNThreadsWithTLS(N, tls));
EXPECT_EQ(init_id + N, TLSReporter::g_last_id);
EXPECT_EQ(init_allocated + N, TLSReporter::g_allocated);
if (detachFirst)
{
std::vector<TLSReporter*>& data1 = tls.detachData();
EXPECT_EQ((size_t)N, data1.size());
// no data through gather after detachData()
std::vector<TLSReporter*> data2;
tls.gather(data2);
EXPECT_EQ((size_t)0, data2.size());
tls.cleanupDetachedData();
EXPECT_EQ(init_id + N, TLSReporter::g_last_id);
EXPECT_EQ(init_allocated + 0, TLSReporter::g_allocated);
EXPECT_EQ((size_t)0, data1.size());
}
else
{
std::vector<TLSReporter*> data2;
tls.gather(data2);
EXPECT_EQ((size_t)N, data2.size());
std::vector<TLSReporter*>& data1 = tls.detachData();
EXPECT_EQ((size_t)N, data1.size());
tls.cleanupDetachedData();
EXPECT_EQ((size_t)0, data1.size());
// data2 is not empty, but it has invalid contents
EXPECT_EQ((size_t)N, data2.size());
}
EXPECT_EQ(init_id + N, TLSReporter::g_last_id);
EXPECT_EQ(init_allocated + 0, TLSReporter::g_allocated);
}
TEST(Core_TLS, AccumulatorHoldData_detachData) { testTLSAccumulator(true); }
TEST(Core_TLS, AccumulatorHoldData_gather) { testTLSAccumulator(false); }
}} // namespace
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