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#include <library/cpp/testing/gtest/gtest.h>
#include <library/cpp/yt/global/access.h>
#include <library/cpp/yt/global/mock_modules/module1_defs/direct_access.h>
#include <library/cpp/yt/global/mock_modules/module1_public/test_tag.h>
#include <optional>
#include <thread>
namespace NYT {
namespace {
////////////////////////////////////////////////////////////////////////////////
TEST(TGlobalVariableTest, JustWorks)
{
auto erasedVar = NGlobal::GetErasedVariable(TestTag1);
EXPECT_TRUE(erasedVar.has_value());
auto concreteVar = erasedVar->AsConcrete<int>();
EXPECT_EQ(concreteVar, GetTestVariable1());
SetTestVariable1(12344);
// NB: We copied variable, not a reference to it!
EXPECT_EQ(concreteVar, erasedVar->AsConcrete<int>());
EXPECT_EQ(NGlobal::GetErasedVariable(TestTag1)->AsConcrete<int>(), 12344);
}
TEST(TGlobalVariableTest, MissingTag)
{
static constexpr NGlobal::TVariableTag MissingTag = {};
EXPECT_FALSE(NGlobal::GetErasedVariable(MissingTag));
}
TEST(TGlobalVariableTest, ThreadLocal)
{
auto ensureConstructed = [] {
// NB: tls variable is constructed only after
// being referred to for the first time.
auto val = GetTlsVariable();
++val;
Y_UNUSED(val);
};
auto checkTls = [&ensureConstructed] (int val) {
ensureConstructed();
auto erasedVar = NGlobal::GetErasedVariable(ThreadLocalTag);
EXPECT_TRUE(erasedVar);
EXPECT_EQ(erasedVar->AsConcrete<int>(), 0);
EXPECT_EQ(GetTlsVariable(), 0);
SetTlsVariable(val);
EXPECT_EQ(erasedVar->AsConcrete<int>(), 0);
EXPECT_EQ(NGlobal::GetErasedVariable(ThreadLocalTag)->AsConcrete<int>(), val);
};
checkTls(42);
for (int idx = 0; idx < 42; ++idx) {
auto thread = std::thread(std::bind(checkTls, idx << 2));
thread.join();
}
}
////////////////////////////////////////////////////////////////////////////////
} // namespace
} // namespace NYT
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