| // Copyright 2014 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include <stdint.h> |
| |
| #include <map> |
| #include <string> |
| |
| #include "base/android/jni_android.h" |
| #include "base/android/jni_string.h" |
| #include "base/base_jni_headers/RecordHistogram_jni.h" |
| #include "base/metrics/histogram.h" |
| #include "base/metrics/statistics_recorder.h" |
| |
| namespace base { |
| namespace android { |
| |
| // This backs a Java test util for testing histograms - |
| // MetricsUtils.HistogramDelta. It should live in a test-specific file, but we |
| // currently can't have test-specific native code packaged in test-specific Java |
| // targets - see http://crbug.com/415945. |
| jint JNI_RecordHistogram_GetHistogramValueCountForTesting( |
| JNIEnv* env, |
| const JavaParamRef<jstring>& histogram_name, |
| jint sample) { |
| HistogramBase* histogram = StatisticsRecorder::FindHistogram( |
| android::ConvertJavaStringToUTF8(env, histogram_name)); |
| if (histogram == nullptr) { |
| // No samples have been recorded for this histogram (yet?). |
| return 0; |
| } |
| |
| std::unique_ptr<HistogramSamples> samples = histogram->SnapshotSamples(); |
| return samples->GetCount(static_cast<int>(sample)); |
| } |
| |
| jint JNI_RecordHistogram_GetHistogramTotalCountForTesting( |
| JNIEnv* env, |
| const JavaParamRef<jstring>& histogram_name) { |
| HistogramBase* histogram = StatisticsRecorder::FindHistogram( |
| android::ConvertJavaStringToUTF8(env, histogram_name)); |
| if (histogram == nullptr) { |
| // No samples have been recorded for this histogram. |
| return 0; |
| } |
| |
| return histogram->SnapshotSamples()->TotalCount(); |
| } |
| |
| } // namespace android |
| } // namespace base |