1 files changed, 181 insertions, 0 deletions
diff --git a/third-party/benchmark/bindings/python/google_benchmark/benchmark.cc b/third-party/benchmark/bindings/python/google_benchmark/benchmark.cc
new file mode 100644
index 000000000000..1b01fe7f7f0f
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+++ b/third-party/benchmark/bindings/python/google_benchmark/benchmark.cc
@@ -0,0 +1,181 @@
+// Benchmark for Python.
+
+#include <map>
+#include <string>
+#include <vector>
+
+#include "pybind11/operators.h"
+#include "pybind11/pybind11.h"
+#include "pybind11/stl.h"
+#include "pybind11/stl_bind.h"
+
+#include "benchmark/benchmark.h"
+
+PYBIND11_MAKE_OPAQUE(benchmark::UserCounters);
+
+namespace {
+namespace py = ::pybind11;
+
+std::vector<std::string> Initialize(const std::vector<std::string>& argv) {
+  // The `argv` pointers here become invalid when this function returns, but
+  // benchmark holds the pointer to `argv[0]`. We create a static copy of it
+  // so it persists, and replace the pointer below.
+  static std::string executable_name(argv[0]);
+  std::vector<char*> ptrs;
+  ptrs.reserve(argv.size());
+  for (auto& arg : argv) {
+    ptrs.push_back(const_cast<char*>(arg.c_str()));
+  }
+  ptrs[0] = const_cast<char*>(executable_name.c_str());
+  int argc = static_cast<int>(argv.size());
+  benchmark::Initialize(&argc, ptrs.data());
+  std::vector<std::string> remaining_argv;
+  remaining_argv.reserve(argc);
+  for (int i = 0; i < argc; ++i) {
+    remaining_argv.emplace_back(ptrs[i]);
+  }
+  return remaining_argv;
+}
+
+benchmark::internal::Benchmark* RegisterBenchmark(const char* name,
+                                                  py::function f) {
+  return benchmark::RegisterBenchmark(
+      name, [f](benchmark::State& state) { f(&state); });
+}
+
+PYBIND11_MODULE(_benchmark, m) {
+  using benchmark::TimeUnit;
+  py::enum_<TimeUnit>(m, "TimeUnit")
+      .value("kNanosecond", TimeUnit::kNanosecond)
+      .value("kMicrosecond", TimeUnit::kMicrosecond)
+      .value("kMillisecond", TimeUnit::kMillisecond)
+      .value("kSecond", TimeUnit::kSecond)
+      .export_values();
+
+  using benchmark::BigO;
+  py::enum_<BigO>(m, "BigO")
+      .value("oNone", BigO::oNone)
+      .value("o1", BigO::o1)
+      .value("oN", BigO::oN)
+      .value("oNSquared", BigO::oNSquared)
+      .value("oNCubed", BigO::oNCubed)
+      .value("oLogN", BigO::oLogN)
+      .value("oNLogN", BigO::oLogN)
+      .value("oAuto", BigO::oAuto)
+      .value("oLambda", BigO::oLambda)
+      .export_values();
+
+  using benchmark::internal::Benchmark;
+  py::class_<Benchmark>(m, "Benchmark")
+      // For methods returning a pointer tor the current object, reference
+      // return policy is used to ask pybind not to take ownership oof the
+      // returned object and avoid calling delete on it.
+      // https://pybind11.readthedocs.io/en/stable/advanced/functions.html#return-value-policies
+      //
+      // For methods taking a const std::vector<...>&, a copy is created
+      // because a it is bound to a Python list.
+      // https://pybind11.readthedocs.io/en/stable/advanced/cast/stl.html
+      .def("unit", &Benchmark::Unit, py::return_value_policy::reference)
+      .def("arg", &Benchmark::Arg, py::return_value_policy::reference)
+      .def("args", &Benchmark::Args, py::return_value_policy::reference)
+      .def("range", &Benchmark::Range, py::return_value_policy::reference,
+           py::arg("start"), py::arg("limit"))
+      .def("dense_range", &Benchmark::DenseRange,
+           py::return_value_policy::reference, py::arg("start"),
+           py::arg("limit"), py::arg("step") = 1)
+      .def("ranges", &Benchmark::Ranges, py::return_value_policy::reference)
+      .def("args_product", &Benchmark::ArgsProduct,
+           py::return_value_policy::reference)
+      .def("arg_name", &Benchmark::ArgName, py::return_value_policy::reference)
+      .def("arg_names", &Benchmark::ArgNames,
+           py::return_value_policy::reference)
+      .def("range_pair", &Benchmark::RangePair,
+           py::return_value_policy::reference, py::arg("lo1"), py::arg("hi1"),
+           py::arg("lo2"), py::arg("hi2"))
+      .def("range_multiplier", &Benchmark::RangeMultiplier,
+           py::return_value_policy::reference)
+      .def("min_time", &Benchmark::MinTime, py::return_value_policy::reference)
+      .def("iterations", &Benchmark::Iterations,
+           py::return_value_policy::reference)
+      .def("repetitions", &Benchmark::Repetitions,
+           py::return_value_policy::reference)
+      .def("report_aggregates_only", &Benchmark::ReportAggregatesOnly,
+           py::return_value_policy::reference, py::arg("value") = true)
+      .def("display_aggregates_only", &Benchmark::DisplayAggregatesOnly,
+           py::return_value_policy::reference, py::arg("value") = true)
+      .def("measure_process_cpu_time", &Benchmark::MeasureProcessCPUTime,
+           py::return_value_policy::reference)
+      .def("use_real_time", &Benchmark::UseRealTime,
+           py::return_value_policy::reference)
+      .def("use_manual_time", &Benchmark::UseManualTime,
+           py::return_value_policy::reference)
+      .def(
+          "complexity",
+          (Benchmark * (Benchmark::*)(benchmark::BigO)) & Benchmark::Complexity,
+          py::return_value_policy::reference,
+          py::arg("complexity") = benchmark::oAuto);
+
+  using benchmark::Counter;
+  py::class_<Counter> py_counter(m, "Counter");
+
+  py::enum_<Counter::Flags>(py_counter, "Flags")
+      .value("kDefaults", Counter::Flags::kDefaults)
+      .value("kIsRate", Counter::Flags::kIsRate)
+      .value("kAvgThreads", Counter::Flags::kAvgThreads)
+      .value("kAvgThreadsRate", Counter::Flags::kAvgThreadsRate)
+      .value("kIsIterationInvariant", Counter::Flags::kIsIterationInvariant)
+      .value("kIsIterationInvariantRate",
+             Counter::Flags::kIsIterationInvariantRate)
+      .value("kAvgIterations", Counter::Flags::kAvgIterations)
+      .value("kAvgIterationsRate", Counter::Flags::kAvgIterationsRate)
+      .value("kInvert", Counter::Flags::kInvert)
+      .export_values()
+      .def(py::self | py::self);
+
+  py::enum_<Counter::OneK>(py_counter, "OneK")
+      .value("kIs1000", Counter::OneK::kIs1000)
+      .value("kIs1024", Counter::OneK::kIs1024)
+      .export_values();
+
+  py_counter
+      .def(py::init<double, Counter::Flags, Counter::OneK>(),
+           py::arg("value") = 0., py::arg("flags") = Counter::kDefaults,
+           py::arg("k") = Counter::kIs1000)
+      .def(py::init([](double value) { return Counter(value); }))
+      .def_readwrite("value", &Counter::value)
+      .def_readwrite("flags", &Counter::flags)
+      .def_readwrite("oneK", &Counter::oneK);
+  py::implicitly_convertible<py::float_, Counter>();
+  py::implicitly_convertible<py::int_, Counter>();
+
+  py::bind_map<benchmark::UserCounters>(m, "UserCounters");
+
+  using benchmark::State;
+  py::class_<State>(m, "State")
+      .def("__bool__", &State::KeepRunning)
+      .def_property_readonly("keep_running", &State::KeepRunning)
+      .def("pause_timing", &State::PauseTiming)
+      .def("resume_timing", &State::ResumeTiming)
+      .def("skip_with_error", &State::SkipWithError)
+      .def_property_readonly("error_occurred", &State::error_occurred)
+      .def("set_iteration_time", &State::SetIterationTime)
+      .def_property("bytes_processed", &State::bytes_processed,
+                    &State::SetBytesProcessed)
+      .def_property("complexity_n", &State::complexity_length_n,
+                    &State::SetComplexityN)
+      .def_property("items_processed", &State::items_processed,
+                    &State::SetItemsProcessed)
+      .def("set_label", (void (State::*)(const char*)) & State::SetLabel)
+      .def("range", &State::range, py::arg("pos") = 0)
+      .def_property_readonly("iterations", &State::iterations)
+      .def_readwrite("counters", &State::counters)
+      .def_readonly("thread_index", &State::thread_index)
+      .def_readonly("threads", &State::threads);
+
+  m.def("Initialize", Initialize);
+  m.def("RegisterBenchmark", RegisterBenchmark,
+        py::return_value_policy::reference);
+  m.def("RunSpecifiedBenchmarks",
+        []() { benchmark::RunSpecifiedBenchmarks(); });
+};
+}  // namespace