gecko/toolkit/components/telemetry/gen-histogram-enum.py
Nathan Froyd 96c870cc3d Bug 1204994 - part 2 - rename all USE_COUNTER_* histograms to USE_COUNTER2_* histograms; r=bz,vladan
We're changing the definition of each of the use counter histograms.
Therefore, they need new names, so as to not throw wrenches into the
server-side machinery.  This renaming is the most straightforward way to
do things and similar to how we have renamed other histograms before.
2015-09-15 20:44:37 -04:00

69 lines
2.6 KiB
Python

# 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
# - HistogramFirstUseCounter
# - HistogramLastUseCounter
# - HistogramUseCounterCount
#
# The histograms are defined in files provided as command-line arguments.
from __future__ import print_function
import histogram_tools
import itertools
import sys
banner = """/* This file is auto-generated, see gen-histogram-enum.py. */
"""
def main(output, *filenames):
print(banner, file=output)
print("enum ID : uint32_t {", file=output)
groups = itertools.groupby(histogram_tools.from_files(filenames),
lambda h: h.name().startswith("USE_COUNTER2_"))
seen_use_counters = False
# Note that histogram_tools.py guarantees that all of the USE_COUNTER2_*
# histograms are defined in a contiguous block. We therefore assume
# that there's at most one group for which use_counter_group is true.
for (use_counter_group, histograms) in groups:
if use_counter_group:
seen_use_counters = True
# The HistogramDUMMY* enum variables are used to make the computation
# of Histogram{First,Last}UseCounter easier. Otherwise, we'd have to
# special case the first and last histogram in the group.
if use_counter_group:
print(" HistogramFirstUseCounter,", file=output)
print(" HistogramDUMMY1 = HistogramFirstUseCounter - 1,", file=output)
for histogram in histograms:
cpp_guard = histogram.cpp_guard()
if cpp_guard:
print("#if defined(%s)" % cpp_guard, file=output)
print(" %s," % histogram.name(), file=output)
if cpp_guard:
print("#endif", file=output)
if use_counter_group:
print(" HistogramDUMMY2,", file=output)
print(" HistogramLastUseCounter = HistogramDUMMY2 - 1,", file=output)
print(" HistogramCount,", file=output)
if seen_use_counters:
print(" HistogramUseCounterCount = HistogramLastUseCounter - HistogramFirstUseCounter + 1", file=output)
else:
print(" HistogramFirstUseCounter = 0,", file=output)
print(" HistogramLastUseCounter = 0,", file=output)
print(" HistogramUseCounterCount = 0", file=output)
print("};", file=output)
if __name__ == '__main__':
main(sys.stdout, *sys.argv[1:])