diff options
Diffstat (limited to 'toolkit/components/telemetry/build_scripts/gen_histogram_enum.py')
-rw-r--r-- | toolkit/components/telemetry/build_scripts/gen_histogram_enum.py | 94 |
1 files changed, 94 insertions, 0 deletions
diff --git a/toolkit/components/telemetry/build_scripts/gen_histogram_enum.py b/toolkit/components/telemetry/build_scripts/gen_histogram_enum.py new file mode 100644 index 0000000000..8d83e760c5 --- /dev/null +++ b/toolkit/components/telemetry/build_scripts/gen_histogram_enum.py @@ -0,0 +1,94 @@ +# This Source Code Form is subject to the terms of the Mozilla Public +# License, v. 2.0. If a copy of the MPL was not distributed with this +# file, You can obtain one at http://mozilla.org/MPL/2.0/. + +# Write out a C++ enum definition whose members are the names of +# histograms as well as the following other members: +# +# - HistogramCount +# +# The histograms are defined in files provided as command-line arguments. + +import sys + +import buildconfig +from mozparsers import parse_histograms +from mozparsers.shared_telemetry_utils import ParserError + +banner = """/* This file is auto-generated, see gen_histogram_enum.py. */ +""" + +header = """ +#ifndef mozilla_TelemetryHistogramEnums_h +#define mozilla_TelemetryHistogramEnums_h + +#include <cstdint> +#include <type_traits> + +namespace mozilla { +namespace Telemetry { +""" + +footer = """ +} // namespace mozilla +} // namespace Telemetry +#endif // mozilla_TelemetryHistogramEnums_h""" + + +def main(output, *filenames): + # Print header. + print(banner, file=output) + print(header, file=output) + + # Load the histograms. + try: + all_histograms = list(parse_histograms.from_files(filenames)) + except ParserError as ex: + print("\nError processing histograms:\n" + str(ex) + "\n") + sys.exit(1) + + # Print the histogram enums. + print("enum HistogramID : uint32_t {", file=output) + for histogram in all_histograms: + if histogram.record_on_os(buildconfig.substs["OS_TARGET"]): + print(" %s," % histogram.name(), file=output) + + print(" HistogramCount,", file=output) + + print("};", file=output) + + # Write categorical label enums. + categorical = filter(lambda h: h.kind() == "categorical", all_histograms) + categorical = filter( + lambda h: h.record_on_os(buildconfig.substs["OS_TARGET"]), categorical + ) + enums = [("LABELS_" + h.name(), h.labels(), h.name()) for h in categorical] + for name, labels, _ in enums: + print("\nenum class %s : uint32_t {" % name, file=output) + print(" %s" % ",\n ".join(labels), file=output) + print("};", file=output) + + print( + "\ntemplate<class T> struct IsCategoricalLabelEnum : std::false_type {};", + file=output, + ) + for name, _, _ in enums: + print( + "template<> struct IsCategoricalLabelEnum<%s> : std::true_type {};" % name, + file=output, + ) + + print("\ntemplate<class T> struct CategoricalLabelId {};", file=output) + for name, _, id in enums: + print( + "template<> struct CategoricalLabelId<%s> : " + "std::integral_constant<uint32_t, %s> {};" % (name, id), + file=output, + ) + + # Footer. + print(footer, file=output) + + +if __name__ == "__main__": + main(sys.stdout, *sys.argv[1:]) |