| // Copyright 2017 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. |
| |
| #ifndef COMPONENTS_METRICS_SINGLE_SAMPLE_METRICS_H_ |
| #define COMPONENTS_METRICS_SINGLE_SAMPLE_METRICS_H_ |
| |
| #include "base/callback.h" |
| #include "components/metrics/public/interfaces/single_sample_metrics.mojom.h" |
| |
| namespace metrics { |
| |
| using CreateProviderCB = |
| base::RepeatingCallback<void(mojom::SingleSampleMetricsProviderRequest)>; |
| |
| // Initializes and sets the base::SingleSampleMetricsFactory for the current |
| // process. |create_provider_cb| is used to create provider instances per each |
| // thread that the factory is used on; this is necessary since the underlying |
| // providers must only be used on the same thread as construction. |
| // |
| // We use a callback here to avoid taking additional DEPS on content and a |
| // service_manager::Connector() for simplicity and to avoid the need for |
| // using the service test harness in metrics unittests. |
| // |
| // Typically this is called in the process where termination may occur without |
| // warning; e.g. perhaps a renderer process. |
| extern void InitializeSingleSampleMetricsFactory( |
| CreateProviderCB create_provider_cb); |
| |
| // Creates a mojom::SingleSampleMetricsProvider capable of vending single sample |
| // metrics attached to a mojo pipe. |
| // |
| // Typically this is given to a service_manager::BinderRegistry in the process |
| // that has a deterministic shutdown path and which serves as a stable endpoint |
| // for the factory created by the above initialize method in another process. |
| extern void CreateSingleSampleMetricsProvider( |
| mojom::SingleSampleMetricsProviderRequest request); |
| |
| } // namespace metrics |
| |
| #endif // COMPONENTS_METRICS_SINGLE_SAMPLE_METRICS_H_ |
