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library/cpp/lwtrace/example5/lwtrace_example5.cpp
30 строк
885 B
qkrorlqr
Initial NBS OpenSource export
28 апр 2023, 21:54
28 апр 2023, 21:54
783a858
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#include <library/cpp/lwtrace/all.h> #include <library/cpp/lwtrace/lwprobe.h> template <ui64 N> ui64 Fact() { ui64 result = N * Fact<N - 1>(); #ifndef LWTRACE_DISABLE // Note that probe is create on the first pass // LWTRACE_DECLARE_PROVIDER and LWTRACE_DEFINE_PROVIDER are not needed // (Provider is created implicitly) static NLWTrace::TLWProbe<ui64> factProbe( "LWTRACE_EXAMPLE_PROVIDER", "FactProbe_" + ToString(N), {}, {"result"}); LWPROBE_OBJ(factProbe, result); #endif // LWTRACE_DISABLE return result; } template <> ui64 Fact<0>() { return 1; } int main() { Fact<6>(); // First run is required to create probes we can use later in trace query NLWTrace::StartLwtraceFromEnv(); // parse trace query and create trace session Cout << Fact<6>() << Endl; // actually trigger probes return 0; }