| // Copyright 2020 The Chromium OS 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 DIAGNOSTICS_CROS_HEALTHD_FETCHERS_FAN_FETCHER_H_ |
| #define DIAGNOSTICS_CROS_HEALTHD_FETCHERS_FAN_FETCHER_H_ |
| |
| #include <vector> |
| |
| #include <base/callback_forward.h> |
| #include <base/files/file_path.h> |
| #include <base/memory/weak_ptr.h> |
| |
| #include "diagnostics/cros_healthd/system/context.h" |
| #include "mojo/cros_healthd_executor.mojom.h" |
| #include "mojo/cros_healthd_probe.mojom.h" |
| |
| namespace diagnostics { |
| |
| // Relative filepath used to determine whether a device has a Google EC. |
| constexpr char kRelativeCrosEcPath[] = "sys/class/chromeos/cros_ec"; |
| |
| // The FanFetcher class is responsible for gathering fan info reported by |
| // cros_healthd. |
| class FanFetcher { |
| public: |
| using FetchFanInfoCallback = |
| base::OnceCallback<void(chromeos::cros_healthd::mojom::FanResultPtr)>; |
| |
| explicit FanFetcher(Context* context); |
| FanFetcher(const FanFetcher&) = delete; |
| FanFetcher& operator=(const FanFetcher&) = delete; |
| ~FanFetcher(); |
| |
| // Returns either a list of data about each of the device's fans or the error |
| // that occurred retrieving the information. |
| void FetchFanInfo(const base::FilePath& root_dir, |
| FetchFanInfoCallback callback); |
| |
| private: |
| // Handles the executor's response to a GetFanSpeed IPC. |
| void HandleFanSpeedResponse( |
| FetchFanInfoCallback callback, |
| chromeos::cros_healthd_executor::mojom::ProcessResultPtr result); |
| |
| // Unowned pointer that outlives this FanFetcher instance. |
| Context* const context_ = nullptr; |
| |
| // Must be the last member of the class, so that it's destroyed first when an |
| // instance of the class is destroyed. This will prevent any outstanding |
| // callbacks from being run and segfaulting. |
| base::WeakPtrFactory<FanFetcher> weak_factory_{this}; |
| }; |
| |
| } // namespace diagnostics |
| |
| #endif // DIAGNOSTICS_CROS_HEALTHD_FETCHERS_FAN_FETCHER_H_ |